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>> SPEAKER 1: All, dritt welcome back.

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Dan huwa CS50.

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U dan huwa l-bidu ta 'disa' ġimgħa.

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U dan huwa l-bidu tal-bqija tal-
ħin tiegħek CS50, li aħna

6
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transizzjoni issa, finalment, lill-web
aspett tal-kors, fejn inti ser

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issib li ħafna ta 'l-elementi fundamentali li
konna qed jesporta għal ġimgħat

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xorta terga 'lura biex iżuru,
jew haunt, us.

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Imma issa, inti ser issib li huwa ta '
ordni ta 'kobor aktar faċli biex

10
00:00:33,440 --> 00:00:36,540
twettaq ċerti kompiti u
isolvu ċerti problemi -

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tant li anki jekk int ħsibt
ċerti settijiet problematika kienu qegħdin gost fil tagħhom

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stess mod, naħseb li inti ser issib
li tistabbilixxi p 7, p stabbiliti 8, u mbagħad,

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finalment, il-proġett finali se jkun
l-aktar sodisfazzjoni għaliex inti taf

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issib li aħna jibdew jieħdu għal mogħtija
issa l-affarijiet bħall-ġestjoni tal-memorja, u

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pointers, u dak li għaddej
fuq taħt il-barnuża.

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U għal darb'oħra, tematiċi, kollha matul il-
semestru kienet din saffi

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u saffi.

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U issa aħna qed tip ta 'up
hawn, wieqfa fuq il-

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ispallejn tal ġimgħat li għaddew.

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>> Issa, jiġbor lura mingħand aħħar darba li aħna
tkellem dwar kif l-internet maħduma.

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U dan kien forsi
oversimplification, imma ftakar li

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kull kompjuter fid-dinja għandu IP
jindirizzaw, għalkemm dan l-daqsxejn ta '

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oversimplification xorta.

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U dawk l-indirizzi huma użati biex unikament
jidentifikaw magni b'tali mod li

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meta inti tibgħat l-informazzjoni, jew pakketti,
biex ngħidu hekk, huma jista 'jkollhom oriġini

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indirizz u l-indirizz destinazzjoni.

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U dawk l-istess indirizzi IP jistgħu jintużaw
kemm għall-ġid u wkoll għall-ħażen,

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li track inti, per eżempju.

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Fil-fatt, kull wieħed u waħda minnkom bil-laptop
miftuħa issa, jew telefon fil tiegħek

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but, għandha l-indirizz IP
fuq in-netwerk Harvard.

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U huwa mhux kollha li diffiċli li
jikkorrelataw li min u fejn inti

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huma dawn il-jiem.

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Iżda aktar fuq li forsi
fil-futur.

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>> Now I ħsibt I d jġib lura xi
memorji ta '[? itejbu?] u jagħtuk

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clip ieħor minn juru inti
tista 'ssib familjari.

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Jekk nistgħu dim-dwal
għal ftit ftit sekondi.

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Il Numb3rs juru.

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>> SPEAKER 2: Huwa indirizz IPP4 32-bit.

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>> SPEAKER 3: IPP, kif fil-internet?

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>> SPEAKER 2: Netwerk Privat.

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Biex netwerk privat Amita tal.

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Hija hekk aqwa.

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>> SPEAKER 3: Come on, Charlie.

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>> SPEAKER 2: Huwa.

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A indirizz IP mera.

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Hi kiri us jaraw dak
hi qed jagħmel fil-ħin reali.

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>> SPEAKER 1: OK, so a ftit affarijiet
ħażin ma 'din l-istampa.

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Allura wieħed, u dan huwa wieħed aċċettabbli,
dan huwa attwalment

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ma indirizz IP validu.

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A indirizz IP validu għandu jkun numri
tal-formola w.x.y.z, fejn kull waħda

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dawn l-ittri hija 0-255.

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Iżda li l-multa minħabba biss bħall-
movies meta dawn ikunu numri tat-telefon foloz,

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huma foloz indirizzi IP.

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Inti ma attwalment tolqot servers reali.

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>> Imma mind you, dan huwa browser.

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U browsers ma tibda outputting
kodiċi tal-kompjuter bħal dan.

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U jekk inħarsu ftit aktar profonda, avviż
li l-lingwa li dawn qed jaraw

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fuq l-iskrin hija lingwa msejħa
Għan Ċ, li hija l-lingwa li

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li apps iPhone huma miktuba,
partikolarment dawk li jinvolvu

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krejons, kif tista 'tara mill-
il-kodiċi tas-sors hawn.

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>> OK, ħsibt li dan kien umoristiċi.

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Allura dan snippet tal-kodiċi għandha assolutament
x'taqsam xejn ma 'kwalunkwe dan

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partikolari episodju kien madwar.

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Allura l-Joke huwa tip dwar il-folks
tieħu għal din tingħata.

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Iżda dan mhux kollox li diffiċli biex jiksbu
dawn id-dettalji tekniċi dritt.

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U nixtieq ninkoraġġukom.

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U fil-fatt, 50 tista 'tajjeb ħafna jħassru
ħafna ta 'juri TV u films jew inti

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għaliex inti ser issib li huwa biss
mhux possibbli dak li qed

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tagħmel fuq l-iskrin.

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Iżda fil-fatt, dan huwa l-kodiċi li inti
tista 'tara dan fl-applikazzjoni iPhone

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jew l-applikazzjoni OS Mac.

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Hija għandha x'taqsam xejn affattu
li tagħmel ma 'sigurtà.

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Allura żżomm għajnejk out għal aktar
dawn l-affarijiet divertenti bħal dik.

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>> Iżda llum aħna jibdew adsa verament
profondament għal firxa sħiħa ta 'lingwi.

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An tabilħaqq, wieħed mill-globali
takeaways ta dan il-porzjon tal-

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kors ma jitgħallmu kif program
fil-PHP, ma jitgħallmu SQL per se, ma

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jitgħallmu JavaScript per se, iżda pjuttost
biex jgħallmu lilek innifsek kif jgħallmu

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yourself lingwi ġodda għaliex, fil-fatt,
aħna tibda tieħu issa l-

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roti ta 'taħriġ off sabiex wara
aħħar course, inti ma jistennewx 20

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ispeċifikazzjoni paġna li tgħid kif inti
biex timplimenta uħud programm.

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Inti għandek l-ingredjenti biżżejjed fil tiegħek
moħħ, u għodod biżżejjed fil għodda tiegħek

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kit, li biex jibda jinbena
soluzzjonijiet għall-problemi ta 'interess għall-

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inti għal xi grupp istudenti, għal xi
proġett ta 'riċerka, jew verament xejn

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ta 'interess għalik.

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>> Allura lejn dak il-għan, ifakkar li dan kien
l-istampa fassalna dan aħħar darba.

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U dan huwa żewġ kompjuters, klijent u
qtugħ, jitkellmu ma 'xulxin.

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U l-protokoll, il-lingwa, hekk li
jitkellmu, li dawn iż-żewġ kompjuters jiġri

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li jitkellem huwa msejjaħ HTTP.

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U dan huwa biss il-protokoll użat mill-
kompjuters li tittrasferixxi informazzjoni fuq

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il-world wide web.

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Il-web, naturalment, huwa biss servizz wieħed
li timxi fuq quċċata ta 'l-

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hekk imsejħa internet.

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X'hemm servizz ieħor disponibbli fuq
quċċata tal-internet f'dawn il-jiem?

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Xi protokoll ieħor jew - dak li?

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>> UDJENZA: FTP.

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>> SPEAKER 1: FTP.

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Allura File Protokoll Trasferiment huwa ieħor.

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Ħafna mill inti probabilment ma jkunux użati.

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Iżda ħafna inti probabilment użati
affarijiet simili Gchat, jew instant

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messaġġi b'mod aktar ġenerali,
ċertament email.

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U dawk, wisq, huma servizzi li jimxu fuq
quċċata tal-internet għaliex, fil-

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aħħar tal-ġurnata, l-internet innifsu
verament biss tikseb data minn punt A sa

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punt B. U juża numru ta '
partiċelli nnifisha, wieħed minnhom jew tnejn

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minnhom aktar imsejħa TCP / IP ġenerali,
li huwa li jgħidu li wieħed kompjuter fuq

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l-internet jista 'attwalment tkun qiegħda tagħmel
affarijiet differenti, email,

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u web, u oħrajn.

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Google ma ħafna ta 'dan.

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Allura kif huma dawk is-servizzi unikament
identifikati, ma nistgħu ngħidu, fuq kompjuter

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li jistgħu fil-fatt tkun qiegħda tagħmel
affarijiet multipli?

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>> In-numru tal-port.

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U dawn huma biss tal-bniedem arbitrarja
konvenzjonijiet bħal 80 huwa web, 443 huwa

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encrypted web, 25 huwa email.

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U hemm għenieqed ta 'oħrajn.

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U dawn in-numri huma sempliċiment inklużi
dawn il-pakketti ta 'informazzjoni, dawk

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pakkett virtwali, li attwalment
fihom talba jew risposta.

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>> Allura meta ikollok lura 'risposta mill-
web, tipikament, inti ma tara l-ebda

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numri affattu f'termini tal-
kodiċi istat tar-rispons.

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Inti ma attwalment ara l-
ħidma interna ta 'l-

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pakketti li jiġu lura.

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Iżda 200 tassew ifisser OK.

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U dan ifisser kollox huwa tajjeb.

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Inti tista raw mazz ta 'dawn.

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Li hija probabbilment l-aktar komuni
inti stajt tidher fuq il-web?

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>> 404.

128
00:06:05,980 --> 00:06:07,330
Dan ifisser biss fajl ma nstabx.

129
00:06:07,330 --> 00:06:08,270
Dan ifisser xi ħadd invitat up.

130
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Inti ma mistyping mill-URL, jew xi ħadd
inkella ma billi jagħtik

131
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URL invalida, jew imħassra l-
fajl u l-URL għadu

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qed jintużaw minn nies.

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Allura kull numru ta 'raġunijiet jistgħu jispjegaw
għaliex fajl ma jinstabx.

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U tkun taf tara, fil-ġimgħat li ġejjin,
dawn kodiċi ta 'żbalji oħra, u tkun taf

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jieħdu vantaġġ ta 'xi wħud minnhom.

136
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L-agħar huwa 500.

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Jekk ikollok żball 500 fil-kodiċi inti ħadthom
bil-miktub, jaħsbu li bħala tip ta 'l-

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Analog ta 'difetti seg fil-
dinja ta 'programmazzjoni web.

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Huwa mhux daqshekk dire.

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Iżda dan ifisser biss li, x'imkien,
inti invitat up.

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Allura bil-ħerqa li dawk.

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>> Imma ejja ara jekk nistgħu
tara dawn fil-kuntest.

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Let me go għal browser hawn
u tagħmel dan li ġej.

144
00:06:43,460 --> 00:06:45,710
Allura dan huwa Chrome, li jiġri li
tkun installata fil-appliance.

145
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Iżda aktar minn darba kull browser dawn il-jiem għandha
xi funzjonalità ekwivalenti.

146
00:06:49,410 --> 00:06:52,610
Jien ser jitla 'menu tal-Chrome,
u mur Għodod, u jien se jmorru

147
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li Developer Tools.

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U tkun taf tara li dan il-panel ftit
jiftaħ fil-qiegħ tat-tieqa.

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Shortcut ieħor, li tkun onest, li jien
normalment juża myself huwa li Right click

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jew Control ikklikkja kullimkien fuq il-web
paġna u biss jmorru għall Spezzjona Element.

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U li mhux biss se tiftaħ
dan għandhom għalik.

152
00:07:07,440 --> 00:07:10,230
Din se tiftaħ, speċifikament,
il-porzjon Elementi fuq

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naħa tax-xellug.

154
00:07:11,430 --> 00:07:12,460
>> Allura aħna qed ovvjament jaraw Google.

155
00:07:12,460 --> 00:07:13,930
Huma mibdula logo tagħhom illum.

156
00:07:13,930 --> 00:07:20,200
Imma fuq jekk I iscroll up hawn, avviż
li taħt Elementi, tara

157
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dak li sejjaħ HTML, HyperText Markup
Lingwa, u dan huwa l-lingwa

158
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li dan u kollha paġni web,
verament, huma miktuba pulzieri

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Iżda huwa attwalment ifformattjat għat
us tant aktar readably

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milli normalment huwa.

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Fil-fatt, jekk I zoom out, u I minflok
biss Dritt ikklikkja jew kontroll Ikklikkja

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ikklikkja fuq il-paġna, u mbagħad mur View
Page Source, dan huwa litteralment dak

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Google mibgħuta sa browser tiegħi.

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00:07:42,150 --> 00:07:46,480
>> Allura xi persuna jew persuni kiteb
Google.com jużaw dan source code.

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Ħafna minn dan huwa ma HTML.

166
00:07:47,790 --> 00:07:49,340
Huwa fil-fatt lingwa msejħa
JavaScript, li

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aħna ser jaslu għal nhar l-Erbgħa.

168
00:07:50,880 --> 00:07:55,580
Imma dak Chrome, u dak li kull browser
tista 'tagħmel għalina, hija tip ta' tara

169
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passat kollha tal-distrazzjonijiet ta 'l-
sintassi crazy, u jerġgħu jdaħħlu l-ispazju abjad

170
00:07:59,610 --> 00:08:02,940
għalina, u anki sintassi jenfasizzaw,
jew colorize affarijiet għalina.

171
00:08:02,940 --> 00:08:06,470
Allura inti ser issib li dawn l-hekk imsejħa
għodod iżviluppatur mibnija fis browsers

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00:08:06,470 --> 00:08:10,830
se jagħmlu l-ħajja tiegħek sabiex, tant faċli
għaliex inti tista 'tesplora, permezz ta' din menu

173
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interface, eżattament dak li l-sottostanti
kodiċi ta 'sors għall

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kwalunkwe paġna fuq l-internet.

175
00:08:15,750 --> 00:08:19,070
U fil-fatt, dan huwa wieħed mill-aktar
modi effettivi biex jitgħallmu kif jagħmlu

176
00:08:19,070 --> 00:08:22,860
xi ħaġa ġdida, għall-inqas jekk il-paġna
mhuwiex tant kumplessa bħala li jisbqu, hija

177
00:08:22,860 --> 00:08:26,700
biex tibda poking madwar huwa HTML, tfittex
fil-hekk imsejħa CSS tagħha, li aħna ser jidħlu

178
00:08:26,700 --> 00:08:30,310
għal daqsxejn kif ukoll, biex tikseb
fehim ta 'kif dak programmer

179
00:08:30,310 --> 00:08:33,480
implimentati xi partikolari
karatteristika tal-paġna.

180
00:08:33,480 --> 00:08:36,530
>> Dritt iżda teknikament aktar interessanti
issa li għaddej biex jkun dan.

181
00:08:36,530 --> 00:08:39,429
Jekk immur għall-tab Netwerk,
ejja issa ċar dan.

182
00:08:39,429 --> 00:08:43,429
Jien ser ikklikkja l-ftit
jaqsmu simbolu hawn, u mbagħad

183
00:08:43,429 --> 00:08:45,630
mur sit ieħor.

184
00:08:45,630 --> 00:08:48,430
U jien biss se tip
fil Facebook.com.

185
00:08:48,430 --> 00:08:51,940
Nru HTTP, HTTPS ebda, no WWW.

186
00:08:51,940 --> 00:08:53,850
Ejja attwalment ara x'jiġri hawn.

187
00:08:53,850 --> 00:08:55,030
>> Ikteb.

188
00:08:55,030 --> 00:08:58,480
Issa avviż mazz sħiħ ta 'għalf biss
deher fil dan il-panel tal-qiegħ, fl

189
00:08:58,480 --> 00:09:00,285
Minbarra l-paġna web
jidhru fil-quċċata.

190
00:09:00,285 --> 00:09:04,890
Jien ser iscroll back up fil-
Network tab hawn, u jien ser

191
00:09:04,890 --> 00:09:06,080
ikklikkja fuq l-ewwel filliera.

192
00:09:06,080 --> 00:09:10,580
X'inhu din l-għodda se jiżvelaw lilna
huwa kull wieħed mill-talbiet HTTP

193
00:09:10,580 --> 00:09:13,550
li malajr biss marru lura u
lura bejn browser tiegħi

194
00:09:13,550 --> 00:09:14,930
u server Facebook.

195
00:09:14,930 --> 00:09:17,830
U hekk kull wieħed minn dawk ringieli
jirrappreżenta wieħed talba jew

196
00:09:17,830 --> 00:09:20,970
rispons, wieħed jew aktar ta '
dawk pakkett virtwali.

197
00:09:20,970 --> 00:09:24,080
Jew aktar każwali, huwa simili persuna
bħal persuna, klijent fil-

198
00:09:24,080 --> 00:09:26,710
restorant, titlob xi ħaġa
għal darb'oħra, u għal darb'oħra, u għal darb'oħra.

199
00:09:26,710 --> 00:09:29,400
U l-wejter jżomm jġibu
lura waħda kull darba.

200
00:09:29,400 --> 00:09:33,850
>> Allura issa, jekk I zoom fil dwar dan, avviż
u dan se jkun l-tip ta 'ħaġa

201
00:09:33,850 --> 00:09:36,600
li int jilqgħu għal u mħeġġa
li jilagħbu bil fuq tiegħek, għaliex aħna

202
00:09:36,600 --> 00:09:38,150
mhux se jmorru permezz kollox
fid-dettal ħafna.

203
00:09:38,150 --> 00:09:40,070
Imma avviż hemm
ftit tabs sub hawn -

204
00:09:40,070 --> 00:09:43,700
Headers, preview, Rispons,
Cookies, u ż-żmien.

205
00:09:43,700 --> 00:09:48,280
Jien biss ser tħares lejn headers
għal issa minħabba li dawn huma ftit

206
00:09:48,280 --> 00:09:53,600
ingredjenti ġewwa tal-pakkett li
jgħinu data tikseb lejn u minn postijiet.

207
00:09:53,600 --> 00:09:57,590
>> Allura l-ewwel, let me ikklikkja dan, View
Sors jmiss Headers Talba.

208
00:09:57,590 --> 00:10:01,910
Hemm talba li browser tiegħi,
Chrome, f'dan il-każ, mibgħuta ġewwa ta '

209
00:10:01,910 --> 00:10:02,910
dak il-pakkett virtwali.

210
00:10:02,910 --> 00:10:04,800
Int ser ikollok ifakkar aħħar ġimgħa I
ittajpjat manwalment waqt li

211
00:10:04,800 --> 00:10:06,380
feint tkun browser.

212
00:10:06,380 --> 00:10:09,980
Imbagħad fakkret lill-server li huwa
tfittex l-ospitanti imsejħa

213
00:10:09,980 --> 00:10:10,835
Facebook.com.

214
00:10:10,835 --> 00:10:13,630
U allura hemm ftit aktar arcane
informazzjoni li aħna ser mewġa

215
00:10:13,630 --> 00:10:14,830
idejn tagħna għal issa.

216
00:10:14,830 --> 00:10:18,640
>> Imma jekk nibda biex iscroll issa
din il-possibilità, let me jiksbu l-

217
00:10:18,640 --> 00:10:19,980
headers rispons.

218
00:10:19,980 --> 00:10:23,270
Dan kien x'hemm fil-virtwali
pakkett li daħlu lura mill-

219
00:10:23,270 --> 00:10:24,095
Facebook.com.

220
00:10:24,095 --> 00:10:27,390
U jekk I ikklikkja View Sors biss
biex tara t-test prima ta 'dan,

221
00:10:27,390 --> 00:10:28,400
avviż ftit affarijiet.

222
00:10:28,400 --> 00:10:32,130
Waħda, Facebook wkoll titkellem l-istess
protokoll, verżjoni 1.1 tagħha.

223
00:10:32,130 --> 00:10:33,390
Allura li sbieħ.

224
00:10:33,390 --> 00:10:36,820
Iżda kodiċi istat 301,
mċaqalqa b'mod permanenti.

225
00:10:36,820 --> 00:10:38,880
>> Ukoll, fejn l-Heck ma Facebook imorru?

226
00:10:38,880 --> 00:10:40,430
X'hemm dan tipprova twassal lilna?

227
00:10:40,430 --> 00:10:44,310
Ukoll, avviż stabbiliti hawn hemm ieħor
header imsejħa Location.

228
00:10:44,310 --> 00:10:51,050
Allura għaliex huwa Facebook javżak me li huma
mċaqalqa b'mod permanenti għal dak URL

229
00:10:51,050 --> 00:10:53,580
jmiss Location?

230
00:10:53,580 --> 00:10:54,962
I nesa l-www.

231
00:10:54,962 --> 00:10:56,250
>> Allura li kien l-għażla tiegħi.

232
00:10:56,250 --> 00:11:00,450
Fil-fatt, ħafna minna rari, probabbilment,
tip www.whatever.com dawn il-jiem.

233
00:11:00,450 --> 00:11:03,390
Iżda jirriżulta minn amministratur tas-sistema,
bħal Facebook, jistgħu

234
00:11:03,390 --> 00:11:06,800
kkonfigurat servers tagħhom b'tali mod
li jew Facebook.com taħdem, jew

235
00:11:06,800 --> 00:11:12,450
www.Facebook.com xogħlijiet, jew, tassew,
xi prefiss bħal quddiem tagħhom

236
00:11:12,450 --> 00:11:13,210
isem tad-dominju.

237
00:11:13,210 --> 00:11:14,500
Allura li ghamilt dan għalina.

238
00:11:14,500 --> 00:11:16,910
U huma ridirezzjonar magħna, probabbilment
għal xi teknika,

239
00:11:16,910 --> 00:11:18,100
xi raġunijiet marketing.

240
00:11:18,100 --> 00:11:21,570
Huma biss jixtiequ canonicalize
fuq www.Facebook.com.

241
00:11:21,570 --> 00:11:24,040
>> Iżda li mhux pjuttost dan.

242
00:11:24,040 --> 00:11:28,560
Jekk I iscroll hawn, ejja
tara x'jiġri.

243
00:11:28,560 --> 00:11:30,810
Dan huwa javżak me aħna
trasferiti permanentement

244
00:11:30,810 --> 00:11:33,450
http://www.Facebook.com.

245
00:11:33,450 --> 00:11:36,620
Mela ejja nħarsu lejn it-tieni talba
li browser tiegħi jibgħat.

246
00:11:36,620 --> 00:11:40,070
Sfortunatament, jidher qisu Facebook
mxiet mill-ġdid minħabba t-tieni

247
00:11:40,070 --> 00:11:44,420
talba, billi jintgħażel dak URL minflok,
jgħid li, wisq, mċaqalqa

248
00:11:44,420 --> 00:11:45,010
b'mod permanenti.

249
00:11:45,010 --> 00:11:48,140
U let me iscroll hawn
għall-headers rispons.

250
00:11:48,140 --> 00:11:51,530
Fejn ikun Facebook marret issa?

251
00:11:51,530 --> 00:11:52,680
>> Allura HTTPS.

252
00:11:52,680 --> 00:11:56,130
Allura issa Facebook bdiet,
partikolarment fid-dawl tal-kurrent

253
00:11:56,130 --> 00:11:59,750
avvenimenti fl-aħħar xhur, speċjalment u
wkoll fl-aħħar ftit ta 'snin

254
00:11:59,750 --> 00:12:03,670
biex iġġiegħel kollha ta 'utenti tagħhom, b'mod tajba
mod, l-użu HTTPS, li huwa aktar

255
00:12:03,670 --> 00:12:06,210
jiżguraw, għalkemm mhux kompletament sigura.

256
00:12:06,210 --> 00:12:10,000
U hekk issa page tiegħi, browser tiegħi huwa
ser titlob din it-tielet URL.

257
00:12:10,000 --> 00:12:14,710
U issa, finalment, irridu jiksbu l-
inkella ma tidhirx 200 OK.

258
00:12:14,710 --> 00:12:18,830
>> Allura dak li fid-dinja kollha jew ta '
dawn ringieli oħra stabbiliti hawn.

259
00:12:18,830 --> 00:12:22,630
I litteralment ittajpjat ħaġa waħda, u tiegħi
browser jidher li talbu simili

260
00:12:22,630 --> 00:12:23,840
20 xi affarijiet fard.

261
00:12:23,840 --> 00:12:24,640
X'inhu dan?

262
00:12:24,640 --> 00:12:25,810
>> UDJENZA: Scripts?

263
00:12:25,810 --> 00:12:28,460
>> SPEAKER 1: Skripts, fajls oħra hekk
miktuba f'lingwa imsejjaħ

264
00:12:28,460 --> 00:12:30,780
JavaScript, li, għal darb'oħra, aħna ser
tara daqsxejn ta 'nhar l-Erbgħa.

265
00:12:30,780 --> 00:12:32,760
X'aktar?

266
00:12:32,760 --> 00:12:33,390
Folji stil.

267
00:12:33,390 --> 00:12:36,350
Allura xi ħaġa f'lingwa imsejjaħ
CSS, li aħna ser tara fil-bit.

268
00:12:36,350 --> 00:12:40,690
Gifs, u JPEGs, u PNGs, u stampi,
u fajls movie - ikun x'ikun il-web page

269
00:12:40,690 --> 00:12:43,280
tkun x'aktarx isir
il-forma ta 'fajl.

270
00:12:43,280 --> 00:12:46,750
U hekk dak li aħna qed tara fuq ix-xellug
naħa hemm kollha tal-fajls

271
00:12:46,750 --> 00:12:50,280
li Chrome kellhom biex tniżżel,
recursively, jekk inti se, sabiex

272
00:12:50,280 --> 00:12:52,430
jikkomponu l-intier tal-paġna.

273
00:12:52,430 --> 00:12:56,210
>> Allura dak li rajna mument ilu ma 'Google,
jekk I ikklikkja fuq l-Elementi

274
00:12:56,210 --> 00:13:00,470
tab, dan, żgur, huwa l-HTML, l-
lingwa li composés din il-paġna.

275
00:13:00,470 --> 00:13:01,890
Iżda hemm għenieqed ta 'affarijiet oħra.

276
00:13:01,890 --> 00:13:02,640
Hemm logo.

277
00:13:02,640 --> 00:13:04,680
Hemm dawk blu ish
ikoni hemmhekk.

278
00:13:04,680 --> 00:13:07,610
U hemm elementi oħra għadhom fuq
il-paġna li nfushom jistgħu jkunu

279
00:13:07,610 --> 00:13:08,610
files separati.

280
00:13:08,610 --> 00:13:11,860
>> Allura x'hemm sbieħ dwar browser hija li
tħares lejn il-lingwa aħna qed tmur

281
00:13:11,860 --> 00:13:14,690
biex tibda tikteb, jew inti ħadthom diġà
kitba bdiet fl P sett 7, iċ-ċifri

282
00:13:14,690 --> 00:13:17,970
taf fejn dawk il-fajls ħajjin, u
tmur u grabs lilhom ukoll.

283
00:13:17,970 --> 00:13:21,010
U jien ma jistax jenfasizza biżżejjed, anki
għalkemm xi wħud dan jista 'tfittex ftit

284
00:13:21,010 --> 00:13:24,820
arcane jew enormi fl-ewwel daqqa t'għajn,
tagħlim kif program

285
00:13:24,820 --> 00:13:28,500
applikazzjonijiet għall-web, huwa
imprezzabbli li wieħed jifhem kif dawn

286
00:13:28,500 --> 00:13:29,410
għodod ftit xogħol.

287
00:13:29,410 --> 00:13:33,830
Dawn huma tip simili GDB bħal għodod,
iżda ferm aktar sempliċi, finalment, għall-użu -

288
00:13:33,830 --> 00:13:37,690
u verament jagħtik għajnejn lejn dak
aħna kont qed tieħu għall mogħtija għal

289
00:13:37,690 --> 00:13:39,170
żmien pjuttost twil issa.

290
00:13:39,170 --> 00:13:42,270
>> Allura x'nistgħu nagħmlu issa ma
din l-informazzjoni?

291
00:13:42,270 --> 00:13:44,875
Well, ejja fil-fatt tagħti ħarsa lejn
il-kunċetti sottostanti HTML.

292
00:13:44,875 --> 00:13:49,025
U aħna ser tiddifferixxi, kif diġà għandna, li
sezzjonijiet din il-ġimgħa, għall-problema

293
00:13:49,025 --> 00:13:53,260
stabbiliti 7 ispeċifikazzjoni, li xi wħud mill-aktar
dettalji ta 'dawn il-lingwi.

294
00:13:53,260 --> 00:13:57,020
Imma ejja ara jekk ma nkunux nistgħu żebgħa
stampa ta 'dak li inti għandek tifhem

295
00:13:57,020 --> 00:13:57,940
globali hawn.

296
00:13:57,940 --> 00:14:02,280
>> Allura HTML, HyperText Markup Language,
ma tkunx lingwa ta 'programmar.

297
00:14:02,280 --> 00:14:03,520
Dak li verament ma jfisser?

298
00:14:03,520 --> 00:14:05,690
Allura HTML tidher bħal dan.

299
00:14:05,690 --> 00:14:06,810
U xi wħud minnkom diġà jafu dan.

300
00:14:06,810 --> 00:14:08,130
Xi wħud minnkom qed tagħmel
dan għal xi żmien.

301
00:14:08,130 --> 00:14:10,270
Imma ejja ara jekk aħna ma jistgħux jimlew
f'xi blanks ukoll.

302
00:14:10,270 --> 00:14:11,760
Allura avviż ftit affarijiet hawn.

303
00:14:11,760 --> 00:14:13,030
Waħda, huwa biss test.

304
00:14:13,030 --> 00:14:15,960
Allura huwa biss bħal source code
C, jew xi lingwa oħra.

305
00:14:15,960 --> 00:14:17,750
>> Avviż li jidher
li hemm tendenza hawn.

306
00:14:17,750 --> 00:14:20,870
Hemm indentazzjoni, iżda teknikament
l-indentazzjoni huwa biss tal-bniedem

307
00:14:20,870 --> 00:14:21,205
konvenzjoni.

308
00:14:21,205 --> 00:14:24,980
A browsers ma care jekk hemm ġdida
linji u tabs simili naraw hemmhekk.

309
00:14:24,980 --> 00:14:27,410
Iżda avviż li hemm
symmetries hawn.

310
00:14:27,410 --> 00:14:31,180
Hemm dak I ser sejħa, fil-quċċata ta '
dan il-fajl, il-lametta miftuħ, jew il-bidu

311
00:14:31,180 --> 00:14:33,030
tag, imsejħa HTML.

312
00:14:33,030 --> 00:14:36,800
U mbagħad, stabbiliti hawn taħt, perfettament infurrati
up, ħafna bħal nagħmlu b'ċineg kaboċċi,

313
00:14:36,800 --> 00:14:40,910
naraw parentesi miftuħa, quddiem
mmejla, HTML, parentesi magħluqa.

314
00:14:40,910 --> 00:14:44,610
Allura dak l-għeluq korrispondenti
tikketta, jew tarf tag, għal dak ħaġa.

315
00:14:44,610 --> 00:14:47,990
>> Flimkien, kollox ġewwa tal-
hekk imsejħa tag miftuħ u qrib tag

316
00:14:47,990 --> 00:14:50,440
compose dak li aħna ser sejħa element.

317
00:14:50,440 --> 00:14:53,910
U aħna ser ara, b'mod ftit mument, huwa
verament bħal node fi siġar.

318
00:14:53,910 --> 00:14:57,470
Għaliex jekk inti taħseb dwar issa l-
Indentazzjoni thats implikat hawn, inti

319
00:14:57,470 --> 00:15:00,780
tip ta 'jkollhom, bħal, grandparent
node imsejħa HTML.

320
00:15:00,780 --> 00:15:06,870
Kif it-tfal ħafna jista you say, ibbażata
fuq din l-istampa, l-element HTML għandha?

321
00:15:06,870 --> 00:15:07,720
>> Allura probabbilment tnejn.

322
00:15:07,720 --> 00:15:10,240
Wieħed huwa l-element tar-ras, apparentament.

323
00:15:10,240 --> 00:15:11,710
U wieħed huwa l-element tal-ġisem.

324
00:15:11,710 --> 00:15:12,555
U għaliex żewġt itfal?

325
00:15:12,555 --> 00:15:15,840
Well, jien biss tip ta 'deduzzjoni li jekk
I jkollhom tikketta ras miftuħa u mbagħad

326
00:15:15,840 --> 00:15:17,820
tag ras qrib, li element.

327
00:15:17,820 --> 00:15:21,200
U mbagħad, jekk ikun hemm korp ieħor miftuħ
tag u tag korp qrib, li huwa simili

328
00:15:21,200 --> 00:15:22,340
element ieħor.

329
00:15:22,340 --> 00:15:26,000
Allura fis-sens li jekk I tip ta 'jduru
l-istampa fuq il-ġenb tiegħu, huwa

330
00:15:26,000 --> 00:15:29,910
simili li jkollhom tag HTML, u mbagħad
tag ras, u mbagħad tag ġisem, u

331
00:15:29,910 --> 00:15:34,290
imbagħad xi test, bonjour dinja, dangling
off tal-lametta korp innifsu.

332
00:15:34,290 --> 00:15:36,620
>> Allura nistgħu tfassal stampa li
tista 'tidher bħal dan.

333
00:15:36,620 --> 00:15:38,020
Il-forom huma arbitrarji.

334
00:15:38,020 --> 00:15:40,870
Iżda tinnota li stajt użati sort ta '
ellissi fil-quċċata li jirrappreżentaw il-

335
00:15:40,870 --> 00:15:41,860
dokument innifsu.

336
00:15:41,860 --> 00:15:45,980
Jirriżulta jista 'jkun hemm Jittieħed oħra
ġewwa ta 'paġna web li stajt ma

337
00:15:45,980 --> 00:15:46,940
mfassla hawn.

338
00:15:46,940 --> 00:15:50,800
Allura aħna qed tmur biex saħansitra hang l-HTML
node off ta 'l-hekk imsejħa dokument node.

339
00:15:50,800 --> 00:15:53,730
U allura għandna ras u
ġisem u titolu, avviż,

340
00:15:53,730 --> 00:15:55,360
li hija nested aktar.

341
00:15:55,360 --> 00:15:58,650
I ma jolqot tqegħid linja addizzjonali
waqfiet ġewwa tal-lametta tal-titolu.

342
00:15:58,650 --> 00:16:02,710
Hija biss qisni kien jkollna
a wisq verbose ftit.

343
00:16:02,710 --> 00:16:07,000
So I xellug f'linja waħda hemm, ma
titolu miftuħa, bonjour dinja, titolu qrib.

344
00:16:07,000 --> 00:16:09,380
U allura aħna għandna xi test
dangling off ta 'hawn.

345
00:16:09,380 --> 00:16:12,200
>> Allura din l-istampa se terga 'lura
għalina meta aħna adsa fis JavaScript.

346
00:16:12,200 --> 00:16:15,110
U intendiment li meta inti
tikteb HTML bħal dan, dak li

347
00:16:15,110 --> 00:16:16,250
hija browser tagħmel?

348
00:16:16,250 --> 00:16:19,290
Well, aħna ma jkollhomx għalfejn tinkwieta dwar
kif qed jagħmel dan, jew ma 'dak

349
00:16:19,290 --> 00:16:23,090
algoritmu, iżda fl-aħħar tal-ġurnata,
meta jirċievi browser HTML simili

350
00:16:23,090 --> 00:16:27,510
li, mill Facebook jew Google, huwa parses
dan, biex ngħidu hekk, jgħid dan,

351
00:16:27,510 --> 00:16:31,160
ma 'xi ħaġa bħal fread, fuq għal
qiegħ, xellug għal-lemin, u kif

352
00:16:31,160 --> 00:16:36,300
jirrealizza, oh, tag miftuħa, u mbagħad mill-qrib
tag, jibda malloc, biex ngħidu hekk,

353
00:16:36,300 --> 00:16:37,800
a node fil-siġra.

354
00:16:37,800 --> 00:16:41,130
U meta ssib, kif konna implikat
hawn mal-indentazzjoni, a

355
00:16:41,130 --> 00:16:45,400
node tfal, hija mallocs node għal dak
u mehmuża li għall-siġra.

356
00:16:45,400 --> 00:16:49,150
>> Allura l-istrutturi tas-siġar, siġar binarju,
siġar ternarji, u siġar akbar, li

357
00:16:49,150 --> 00:16:53,380
aħna glanced fil-ġimgħa jew tnejn ilu, avviż
li l-istess prinċipju huwa

358
00:16:53,380 --> 00:16:54,220
ġejjin lura lilna.

359
00:16:54,220 --> 00:16:57,590
U min implimentati, Chrome kwalunkwe
tim ma li, preżumibbilment kellha

360
00:16:57,590 --> 00:17:00,800
biex timplimenta xi tip ta 'struttura ta' siġra
taħt il-barnuża.

361
00:17:00,800 --> 00:17:05,329
U li hi stess hija probabbilment fil-
lingwa bħal C, jew C + +, jew inqas

362
00:17:05,329 --> 00:17:08,540
lingwa livell li aħna ser
issa jużaw atop-web.

363
00:17:08,540 --> 00:17:11,200
>> Allura issa, forsi, dan se
jagħmel aktar sens.

364
00:17:11,200 --> 00:17:15,420
Tatwaġġ attwali minn xi Guy li jistgħu
jiddispjaċina minnu eventwalment, tip ta '.

365
00:17:15,420 --> 00:17:17,359
OK, id-dritt, u għalhekk ħafna ta 'umoriżmu web.

366
00:17:17,359 --> 00:17:18,599
Mhuwiex verament se
fuq hekk ukoll illum.

367
00:17:18,599 --> 00:17:19,560
Allura aħna ser jimxu fuq.

368
00:17:19,560 --> 00:17:20,180
Kull dritt.

369
00:17:20,180 --> 00:17:22,760
>> Mela ejja tagħti ħarsa issa
fi ftit eżempji.

370
00:17:22,760 --> 00:17:24,660
L-aktar sempliċi possibbli
Ħaġa jista 'jkun dan.

371
00:17:24,660 --> 00:17:29,170
Jien ser jimxi 'l quddiem u tiftaħ fi
gedit fajl imsejjaħ hello.php.

372
00:17:29,170 --> 00:17:31,730

373
00:17:31,730 --> 00:17:36,330
U ġewwa ta 'hawn, jien ser malajr
biss tagħmel dan, printf, ikkwota

374
00:17:36,330 --> 00:17:38,590
unquote, "bonjour dinja."

375
00:17:38,590 --> 00:17:42,460
>> Allura avviż, u jien ser tagħmel backslash n tiegħi,
Stajt ma bothered li tiddikjara prinċipali.

376
00:17:42,460 --> 00:17:45,310
Jirriżulta, fil-PHP, u ħafna ta '
lingwi, inti m'għandekx bżonn prinċipali

377
00:17:45,310 --> 00:17:46,090
funzjoni per se.

378
00:17:46,090 --> 00:17:47,720
Tista 'biss tibda bil-miktub
program tiegħek.

379
00:17:47,720 --> 00:17:51,210
Issa, meta I ħlief dan il-fajl, avviż jien
ser ikollhom jagħmlu dan li ġej.

380
00:17:51,210 --> 00:17:55,360
Jien mhux ser tuża tagħmel, u jien ma
ser tuża clang għaliex PHP, b'differenza

381
00:17:55,360 --> 00:17:57,400
C, ma tkunx lingwa miġbura.

382
00:17:57,400 --> 00:18:01,400
Huwa dak li jissejjaħ interpretat
lingwa, li jfisser li inti run

383
00:18:01,400 --> 00:18:04,650
bħala input permezz tal-programm ieħor
jissejjaħ interpretu.

384
00:18:04,650 --> 00:18:08,150
U dak il-programm jaqraha, fuq għal
qiegħ, xellug għal-lemin, u ma

385
00:18:08,150 --> 00:18:09,290
tkun xi tkun għid li tagħmel.

386
00:18:09,290 --> 00:18:12,920
>> Allura f'dan il-każ hawnhekk għandi
linja waħda li tgħid printf.

387
00:18:12,920 --> 00:18:17,990
Allura meta I run dan is-sors kodiċi,
hello.php, għalkemm program li

388
00:18:17,990 --> 00:18:22,830
jiġri, konvenjenti, li għandu jissejjaħ PHP,
li PHP programm ser jinqara

389
00:18:22,830 --> 00:18:26,120
dan il-fajl, fuq għal isfel, xellug għal-lemin,
u li għaddej biex jagħmlu dak I

390
00:18:26,120 --> 00:18:30,110
għid li tagħmel - eżekuzzjoni kodiċi, u jekk
ma tirrikonoxxix xi ħaġa, biss

391
00:18:30,110 --> 00:18:31,320
tobżoq it out.

392
00:18:31,320 --> 00:18:34,940
Hekk jien ser jimxi 'l quddiem u
run PHP ta hello.php.

393
00:18:34,940 --> 00:18:37,110
Ikteb.

394
00:18:37,110 --> 00:18:39,690
>> U li mhux pjuttost dak I maħsub.

395
00:18:39,690 --> 00:18:40,530
Well, għaliex huwa li?

396
00:18:40,530 --> 00:18:43,910
Ukoll, PHP hija lingwa li attwalment
mfassla sabiex ikunu pjuttost

397
00:18:43,910 --> 00:18:46,150
marbuta mal-web.

398
00:18:46,150 --> 00:18:50,460
Meta jagħmlu paġni web ma 'din il-lingwa
PHP, kif aħna ser malajr tara, aħna ser

399
00:18:50,460 --> 00:18:54,560
trid tagħmel xi ħaġa simili istampar
out linji bħal dan.

400
00:18:54,560 --> 00:18:55,940
>> Hekk jien ser jagħmlu dan.

401
00:18:55,940 --> 00:19:00,810
Bracket miftuħa, marka kwistjoni, PHP, u
issa jien biss se inċiż biss biex iżommu

402
00:19:00,810 --> 00:19:01,960
affarijiet sbieħ.

403
00:19:01,960 --> 00:19:04,910
U issa jien se tagħmel mistoqsija
jimmarkaw parentesi magħluqa.

404
00:19:04,910 --> 00:19:06,270
Allura hemm daqsxejn ta 'assimetrija hawn.

405
00:19:06,270 --> 00:19:07,490
Inti ma tagħmel dan.

406
00:19:07,490 --> 00:19:10,530
U inti ma tagħmel slash, hekk
PHP huwa xi ftit differenti.

407
00:19:10,530 --> 00:19:14,610
>> Imma issa, jekk I terġa dan il-programm,
PHP hello.php, issa I

408
00:19:14,610 --> 00:19:16,090
fil-fatt tikseb World Hello.

409
00:19:16,090 --> 00:19:17,750
U aħna ser tara għaliex dan huwa ta 'valur.

410
00:19:17,750 --> 00:19:20,960
Wieħed, tippermetti lili biex jispeċifikaw,
super espliċitament, dan huwa

411
00:19:20,960 --> 00:19:22,480
kodiċi, tesegwixxi dan.

412
00:19:22,480 --> 00:19:25,480
U dan huwa tabilħaqq liema dawn
tags speċjali jimplikaw hawn.

413
00:19:25,480 --> 00:19:30,330
>> Iżda jfisser ukoll li jekk I biss tagħmel
xi ħaġa bħal I jimmiraw hawn fuq, li

414
00:19:30,330 --> 00:19:34,000
ifisser li, litteralment, li se biss
jiġu stampati mingħajr il-ħtieġa li

415
00:19:34,000 --> 00:19:36,850
attwalment sejħa printf, jew stampata,
jew kwalunkwe funzjoni simili.

416
00:19:36,850 --> 00:19:39,445
Allura aħna ser terga 'lura għal dik
fi ftit mument.

417
00:19:39,445 --> 00:19:40,470
>> Ewwelnett, ejja tagħmel dan.

418
00:19:40,470 --> 00:19:43,950
Ġewwa tal-appliance, għandna
direttorju imsejjaħ Vhosts, għall virtwali

419
00:19:43,950 --> 00:19:47,000
hosts, mmejla ospitanti lokali, mmejla pubbliku.

420
00:19:47,000 --> 00:19:50,240
Allura huwa verbose bit, iżda storja twila
qasir, l-appliance hija mfassla mhux

421
00:19:50,240 --> 00:19:53,770
biss għall-appoġġ C. Huwa wkoll
mfassla għall-appoġġ PHP.

422
00:19:53,770 --> 00:19:57,440
Imma hija wkoll maħsuba biex tkun web
server, u server database.

423
00:19:57,440 --> 00:20:00,230
U li huwa maħsub, u verament konfigurati,
li jkun reminixxenti ta 'kwalunkwe

424
00:20:00,230 --> 00:20:04,230
kummerċjali web hosting kumpanija li
inti tista 'tħallas $ 5 a xahar għal,

425
00:20:04,230 --> 00:20:05,040
$ 100 fix-xahar għal.

426
00:20:05,040 --> 00:20:08,200
Tkun xi tkun is-servizz huwa, huwa konfigurati
li huma simili ħafna għal

427
00:20:08,200 --> 00:20:10,170
reali server produzzjoni dinjija.

428
00:20:10,170 --> 00:20:13,485
>> U dak li tfisser hija li taħdem fuq
l-appliance huwa softwer server web.

429
00:20:13,485 --> 00:20:15,060
Dan jiġri li għandu jissejjaħ Apache.

430
00:20:15,060 --> 00:20:17,790
Huwa biss b'xejn, u sors miftuħ,
u popolari ħafna.

431
00:20:17,790 --> 00:20:23,260
U aħna għandna kkonfigurat Apache li tkun taf
li jekk I żjara URL ċerti, ma

432
00:20:23,260 --> 00:20:28,060
Chrome jew kwalunkwe browser ġewwa tal-
appliance, li tħares lejn dan id-direttorju

433
00:20:28,060 --> 00:20:31,030
għall-fajls li l-
utent qed titlob.

434
00:20:31,030 --> 00:20:32,790
>> Fi kliem ieħor, let me
imorru quddiem u tagħmel dan.

435
00:20:32,790 --> 00:20:36,890
Ġewwa ta 'direttorju pubbliku tiegħi, jien ser
jimxi 'l quddiem u toħloq fajl

436
00:20:36,890 --> 00:20:39,580
imsejħa index.html.

437
00:20:39,580 --> 00:20:41,000
Li tagħti me l-tab hawn.

438
00:20:41,000 --> 00:20:44,210
U jien se jmorru malajr ħafna
u jimxi 'l quddiem u bang out

439
00:20:44,210 --> 00:20:45,010
dan il-programm hawn.

440
00:20:45,010 --> 00:20:48,410
DOCTYPE HTML, li għal issa, biss
jassumi inti għandek tip.

441
00:20:48,410 --> 00:20:53,490
Huwa biss tag arcane, li mhux
verament tag HTML, li tispeċifika li

442
00:20:53,490 --> 00:20:55,050
hawnhekk jidħol xi HTML.

443
00:20:55,050 --> 00:20:57,400
>> Jien ser jimxi 'l quddiem u oħloq
dak rajna mument ilu.

444
00:20:57,400 --> 00:20:58,650
Hawn il-kap tal-paġna.

445
00:20:58,650 --> 00:21:01,170
Ġewwa l-ras kien l -

446
00:21:01,170 --> 00:21:01,890
hekk titolu.

447
00:21:01,890 --> 00:21:04,340
Allura aħna ser jgħidu bonjour, dinja.

448
00:21:04,340 --> 00:21:06,570
U mbagħad stabbiliti hawn kien l-tikketta ġisem.

449
00:21:06,570 --> 00:21:08,580
Let me tagħlaq il-tag ġisem.

450
00:21:08,580 --> 00:21:12,280
U mbagħad fil hawn I ser jgħidu wkoll,
biss għaċ-ċarezza, bonjour dinja.

451
00:21:12,280 --> 00:21:14,770
>> Allura dan huwa, forsi, l-eħfef
paġna web possibbli għalik

452
00:21:14,770 --> 00:21:15,770
tista 'tagħmel dan huwa validu.

453
00:21:15,770 --> 00:21:17,030
Huwa sintattikament validu.

454
00:21:17,030 --> 00:21:18,620
Dak kollu li huwa magħluq jinfetaħ.

455
00:21:18,620 --> 00:21:20,910
Kollox huwa nicely fl
styled u indentata.

456
00:21:20,910 --> 00:21:23,600
Mela ejja ara issa kif I
tista 'aċċess dan il-fajl.

457
00:21:23,600 --> 00:21:25,540
>> Well, let me mur Chrome hawn.

458
00:21:25,540 --> 00:21:35,050
U let me go għal
http://localhost/index.html.

459
00:21:35,050 --> 00:21:36,200
Allura x'hemm ospitanti lokali?

460
00:21:36,200 --> 00:21:39,400
Ukoll, ħafna kwalunkwe kompjuter fid-dinja,
Linux, Mac OS, Windows, għandu laqam

461
00:21:39,400 --> 00:21:40,680
imsejħa ospitanti lokali.

462
00:21:40,680 --> 00:21:42,900
Mela jekk inti qatt tixtieq li nitkellmu
lill-kompjuter tiegħek -

463
00:21:42,900 --> 00:21:45,140
għalkemm, oddly reflexively -

464
00:21:45,140 --> 00:21:47,080
inti sejħa yourself ospitanti lokali.

465
00:21:47,080 --> 00:21:50,390
X'ikun kompjuter tiegħek attwali hija
imsejħa, kemm jekk huwa MacBook David

466
00:21:50,390 --> 00:21:52,490
Arja, jew xi ħaġa aktar
verbose bħal dik.

467
00:21:52,490 --> 00:21:57,760
>> Allura dan il-URL li apparentament huwa ser tuża
l HTTP li tkellem lill-ospitanti lokali,

468
00:21:57,760 --> 00:22:00,800
l-istess kompjuter, l-appliance, u
li għaddej biex titlob, ħu

469
00:22:00,800 --> 00:22:02,570
raden, liema fajl?

470
00:22:02,570 --> 00:22:04,460
Index.html.

471
00:22:04,460 --> 00:22:08,650
Allura l-apparat ikun ikkonfigurat
javvanzaw li tkun taf li jekk jien tistaqsi

472
00:22:08,650 --> 00:22:13,460
għal xi ħaġa bħal index.html, tfittex
fil-folder imsejjaħ Vhosts, b'mod

473
00:22:13,460 --> 00:22:17,950
folder imsejjaħ localhost, fil-folder
hemmhekk imsejħa pubbliku.

474
00:22:17,950 --> 00:22:20,400
Li fejn kollha ta pubbliku tiegħi
fajls ser ikunu.

475
00:22:20,400 --> 00:22:22,610
Hekk jien issa ser jintlaqtu Ikteb.

476
00:22:22,610 --> 00:22:27,100
>> U kkritikat, hemm dik projbit
messaġġ, magħrufa wkoll bħala 403, l-

477
00:22:27,100 --> 00:22:28,490
kodiċi numeriku għaliha.

478
00:22:28,490 --> 00:22:30,130
Allura x'hemm ħażin hawn?

479
00:22:30,130 --> 00:22:33,210
Ukoll, mhuwiex biżżejjed li biss jitqiegħed
il-fajl ġewwa ta 'folder tiegħi.

480
00:22:33,210 --> 00:22:35,790
I bżonn fil-fatt jagħmlu dan li ġej.

481
00:22:35,790 --> 00:22:40,210
>> Let me jmorru fis Vhosts direttorju tiegħi, fis
localhost, fis pubbliku, u ħalli

482
00:22:40,210 --> 00:22:41,680
me do ls l sing.

483
00:22:41,680 --> 00:22:44,510
U hemm affarijiet oħra ftit
fil hawn għal skopijiet lum.

484
00:22:44,510 --> 00:22:50,540
Imma avviż fuq in-naħa tax-xellug, li jmiss
li index.html, aħna biss tara wieħed RW.

485
00:22:50,540 --> 00:22:53,560
U fil-passat, liema
tkun RW ilha għal?

486
00:22:53,560 --> 00:22:54,240
>> Just taqra jew tikteb.

487
00:22:54,240 --> 00:22:58,000
Il-fatt li jgħid rw fuq ix-xellug
ifisser I, is-sid ta 'dan il-fajl, jista'

488
00:22:58,000 --> 00:22:59,020
taqra jew tikteb.

489
00:22:59,020 --> 00:23:05,010
Imma I bżonn biex in-nies kollha fil-
dinja taqra dan, għalkemm mhux tiktibha.

490
00:23:05,010 --> 00:23:09,650
Hekk jien se jibdlu l-mod ta 'l-
fajl, chmod, r kollox plus li tagħti

491
00:23:09,650 --> 00:23:13,910
kulħadd jaqra permess fuq il-
inkartament imsejjaħ index.html.

492
00:23:13,910 --> 00:23:18,040
>> U jekk I issa retype l sing ls, avviż
li, minn hawn, ftit aktar

493
00:23:18,040 --> 00:23:19,160
Tal R popped up.

494
00:23:19,160 --> 00:23:21,090
U għal issa, il-spec tmur
aktar fid-dettall.

495
00:23:21,090 --> 00:23:24,450
Għal P sett 7, li ifisser biss kulħadd
issa tista 'taqra dan il-fajl.

496
00:23:24,450 --> 00:23:27,790
Jekk immur lura lill-browser tiegħi
issa u rikarigu, voila.

497
00:23:27,790 --> 00:23:28,750
Hello dinja.

498
00:23:28,750 --> 00:23:32,260
>> U nista 'anki tiftaħ għodod Chrome tiegħi
u ara, bħad ma 'Google u

499
00:23:32,260 --> 00:23:34,590
Facebook li hemm HTML tiegħi,
ifformattjat ftit

500
00:23:34,590 --> 00:23:35,930
colorized differenti u.

501
00:23:35,930 --> 00:23:40,450
Jekk immur għall-tab netwerk u rikarigu
il-paġna, avviż li hemm il-nikseb

502
00:23:40,450 --> 00:23:42,900
jitlob li Chrome hija li jibgħat
l-appliance.

503
00:23:42,900 --> 00:23:46,020
Hemm il-200 għal dak
partikolari fajl.

504
00:23:46,020 --> 00:23:49,340
Għalhekk fil-qosor, dan huwa kif dawn kollha
diversi biċċiet huma ġejjin flimkien.

505
00:23:49,340 --> 00:23:53,530
Dan biss hekk jiġri li l-web server
aħna qed jużaw id-dritt issa mhux remot,

506
00:23:53,530 --> 00:23:54,210
bħal Facebook.

507
00:23:54,210 --> 00:23:58,330
Huwa litteralment fuq l-istess kompjuter,
li huwa perfettament OK.

508
00:23:58,330 --> 00:24:00,590
>> Allura dak li aktar tista nagħmlu fil-paġna web?

509
00:24:00,590 --> 00:24:03,110
Well, just, ejja riħ permezz
koppja ta 'dawn l-affarijiet.

510
00:24:03,110 --> 00:24:07,860
Iżda let me imorru quddiem u terġa 'tiftaħ
Gedit ma index.html.

511
00:24:07,860 --> 00:24:13,980
U let me imorru quddiem u jgħidu bonjour CS50,
jiffranka dan il-fajl, mur lura għall-

512
00:24:13,980 --> 00:24:16,260
browser, bidla verament underwhelming.

513
00:24:16,260 --> 00:24:19,130
>> Imma x'jiġri jekk irridu li attwalment
link għal xi ħaġa issa?

514
00:24:19,130 --> 00:24:23,480
Għalhekk jirriżulta li jista 'jkollna l-
rabtiet fil HTML li huma biss tags

515
00:24:23,480 --> 00:24:24,140
infushom.

516
00:24:24,140 --> 00:24:27,320
Dan jiġri li jkun jismu l-
ankra tag. a href ugwali

517
00:24:27,320 --> 00:24:33,190
https://www.cs50.net, www.cs50.net
kwotazzjoni mill-qrib, parentesi magħluqa.

518
00:24:33,190 --> 00:24:35,230
U issa ejja ara dak
inkella jiġi jmiss.

519
00:24:35,230 --> 00:24:36,500
>> Stajt fetaħ il-tag.

520
00:24:36,500 --> 00:24:38,990
I issa jeħtieġ li tagħtiha
frażi bħal CS50.

521
00:24:38,990 --> 00:24:40,600
Let me tagħlaq il-tag.

522
00:24:40,600 --> 00:24:42,010
U avviż ftit affarijiet.

523
00:24:42,010 --> 00:24:45,270
Anki jekk hemm dan ħaġa cryptic
hawn, I ma ripetuti meta inti

524
00:24:45,270 --> 00:24:46,010
tagħlaq il-tag.

525
00:24:46,010 --> 00:24:48,230
Inti biss mill-qrib l-tikketta
bl-isem tagħha waħdu.

526
00:24:48,230 --> 00:24:50,940
U dan huwa dak magħruf bħala
attribut b'valur.

527
00:24:50,940 --> 00:24:56,070
Attributi biss jimmodifikaw l-imġiba
ta 'xi tag ġewwa ta' paġna.

528
00:24:56,070 --> 00:24:59,150
>> Allura dan huwa jispeċifika li l-iper
referenza, il-mod fancy ta 'tgħid l-

529
00:24:59,150 --> 00:25:03,660
URL għal dan ankra, għal dan
link, għandu jkun CS50.net.

530
00:25:03,660 --> 00:25:07,440
U t-test li aħna rridu li juru l-
utent ma tkunx dik URL prima, iżda pjuttost

531
00:25:07,440 --> 00:25:08,730
l-CS50 kelma.

532
00:25:08,730 --> 00:25:13,710
>> Mela jekk issa I rikarigu, let me zoom fl għal
ċarezza, let me rikarigu-paġna,

533
00:25:13,710 --> 00:25:16,460
avviż li aħna għandna din l-iskola antika
blu enfasizzat link.

534
00:25:16,460 --> 00:25:20,000
U jekk I imbagħad jerġgħu fuqha, u li għaddej
tkun iebsa biex tara, fil-qiegħ tax-xellug

535
00:25:20,000 --> 00:25:23,690
fuq tal-lemin tal-iskrin, avviż
li jgħid l-URL li

536
00:25:23,690 --> 00:25:24,430
Jien se jmorru.

537
00:25:24,430 --> 00:25:27,940
U jekk I ikklikkja hemmhekk, voila,
issa jien jagħmlu paġni web.

538
00:25:27,940 --> 00:25:30,140
U konna wassal lilna nfusna
għall-home page.

539
00:25:30,140 --> 00:25:32,670
>> Imma avviż liema potenzjal
dan joffri us.

540
00:25:32,670 --> 00:25:34,890
Sigurtà huwa ferm
Vogue dawn il-jiem.

541
00:25:34,890 --> 00:25:41,210
X'jiġri jekk I minflok ngħid xi ħaġa simili
dan, u I minflok tmur għal, per eżempju, ejja

542
00:25:41,210 --> 00:25:42,460
tara, fakeCS50.net.

543
00:25:42,460 --> 00:25:44,660

544
00:25:44,660 --> 00:25:46,360
Reload this page.

545
00:25:46,360 --> 00:25:50,180
>> OK, hekk avviż xorta qisu jien
ser CS50, sakemm għajnejk astute

546
00:25:50,180 --> 00:25:51,560
se Avviż jien ser CS50 foloz.

547
00:25:51,560 --> 00:25:54,550
Jien guessing dan id-dominju ma tittieħed.

548
00:25:54,550 --> 00:25:55,960
OK, dan mhuwiex disponibbli.

549
00:25:55,960 --> 00:25:56,600
Allura li tajjeb.

550
00:25:56,600 --> 00:25:57,900
Ħadd ma attwalment għandha dak dominju.

551
00:25:57,900 --> 00:26:00,380
>> Imma ejja jkun ftit aktar malizzjużi
għaliex dan huwa tip ta 'stupid.

552
00:26:00,380 --> 00:26:02,240
X'jiġri jekk nibdlu dan Paypal.

553
00:26:02,240 --> 00:26:09,960
U jekk dak li nsejħu dan, bħal,
www.paypal.badguy.com,

554
00:26:09,960 --> 00:26:12,070
ikun x'ikun l-dominju huwa.

555
00:26:12,070 --> 00:26:13,700
Li probabbilment jeżisti.

556
00:26:13,700 --> 00:26:16,260
Allura issa let me rikarigu-paġna.

557
00:26:16,260 --> 00:26:22,890
U hawn aħna għandna tip ta 'phishing
attakk, P-H-I-S-H-I-N-G, li hija l-

558
00:26:22,890 --> 00:26:26,760
kelma iblah mogħtija għal attakk li
tipprova informazzjoni ħut, jew, aħjar

559
00:26:26,760 --> 00:26:30,450
għadhom, flus, mill-poplu mill tricking
minnhom fis jipprovdu informazzjoni li

560
00:26:30,450 --> 00:26:31,990
dawn ma kieku kienu jwettqu.

561
00:26:31,990 --> 00:26:33,500
Dan jistenna totalment leġittimu, right?

562
00:26:33,500 --> 00:26:34,930
I għandu jkollhom rabta hawn biex Paypal.com.

563
00:26:34,930 --> 00:26:37,700

564
00:26:37,700 --> 00:26:40,430
Fl-ġustizzja, jekk I sexed it up ma 'xi
grafika, nistgħu jagħmluha ħarsa

565
00:26:40,430 --> 00:26:41,310
aktar bħal PayPal.

566
00:26:41,310 --> 00:26:41,510
Dritt?

567
00:26:41,510 --> 00:26:43,815
Minħabba I tista ', bħala twarrib,
I tista 'tmur għall Paypal.com.

568
00:26:43,815 --> 00:26:47,110
U aħna stajt biss jara kif nista '
tara kollha ta 'HTML tagħhom.

569
00:26:47,110 --> 00:26:50,560
I tista 'biss kopja u oħloq mill-
estetika ta Paypal aktar milli jmorru

570
00:26:50,560 --> 00:26:51,490
iskola antika hawn.

571
00:26:51,490 --> 00:26:55,010
Iżda avviż, naturalment, u huwa ftit
żgħir xorta, biss fil-qiegħ

572
00:26:55,010 --> 00:26:59,190
rokna tax-xellug, fil bħal punt 10
font, inti tara dak URL int

573
00:26:59,190 --> 00:27:01,310
fil-fatt se jiġu mġiegħla.

574
00:27:01,310 --> 00:27:06,580
>> U hekk jekk inti stajt qatt gotten spam qal
jimxi 'l quddiem, u int kont

575
00:27:06,580 --> 00:27:07,420
tkun ġiet kompromessa.

576
00:27:07,420 --> 00:27:10,615
Jekk jogħġbok ikklikkja din ir-rabta u jgħidilna
password tiegħek sabiex jirnexxielna niżguraw int

577
00:27:10,615 --> 00:27:13,010
inti, qatt ma tagħmel dan.

578
00:27:13,010 --> 00:27:14,180
Dawn l-affarijiet għandhom jimxi mingħajr ma tgħid.

579
00:27:14,180 --> 00:27:17,670
Iżda huwa wonderfully divertenti, u
traġiċi, kif kull sena dan jidher li

580
00:27:17,670 --> 00:27:19,660
jiġri li xi nuqqas ta 'żero
numru ta 'nies.

581
00:27:19,660 --> 00:27:21,400
>> U dak l-sbuħija
ta 'phishing.

582
00:27:21,400 --> 00:27:23,160
Tista 'tibgħat emails miljun.

583
00:27:23,160 --> 00:27:27,720
U anki jekk 0.01% tan-nies fil-fatt
ikklikkja fuq Paypal u jagħtuk tiegħek

584
00:27:27,720 --> 00:27:31,040
password, li għadu numru mhux żero
ta 'nies li ħadthom biss jagħtu

585
00:27:31,040 --> 00:27:32,200
flus tagħhom.

586
00:27:32,200 --> 00:27:36,170
U jibgħat emails, naturalment, huwa pjuttost
faċli u, essenzjalment, free

587
00:27:36,170 --> 00:27:36,970
dawn il-jiem.

588
00:27:36,970 --> 00:27:40,410
>> Allura storja twila fil-qosor, wonderfully
idea sbieħ, id-dritt?

589
00:27:40,410 --> 00:27:44,620
Snin ilu, dan kien l-aktar kmieni
web, li tippermetti web ta '

590
00:27:44,620 --> 00:27:46,330
hyperlinks bejn ir-riżorsi.

591
00:27:46,330 --> 00:27:49,520
Iżda hekk malajr jista 'jkun
użati għal skopijiet morda.

592
00:27:49,520 --> 00:27:54,100
U l-email, huwa biżżejjed li jingħad, dawn
jiem, kienu inkorporati ġewwa HTML.

593
00:27:54,100 --> 00:27:55,410
>> Well, let me biss ħaġa waħda oħra.

594
00:27:55,410 --> 00:27:58,640
U aħna ser tipposponi l-aktar għal sezzjoni
problema stabbiliti seba biex jippermettu li inti

595
00:27:58,640 --> 00:28:00,000
tesplora l-partikolaritajiet.

596
00:28:00,000 --> 00:28:01,990
Iżda let me imorru quddiem u
nagħmlu ftit affarijiet hawn.

597
00:28:01,990 --> 00:28:04,840
Jien se jmorru fi u tiddikjara
dak li sejjaħ a div, jew

598
00:28:04,840 --> 00:28:06,080
diviżjoni, tal-paġna.

599
00:28:06,080 --> 00:28:07,770
Let me tagħlaq dik tag div.

600
00:28:07,770 --> 00:28:11,460
>> U jien se ngħid up
hawn fuq tal-paġna.

601
00:28:11,460 --> 00:28:14,940
U allura hawn taħt dan, jien ser tagħmel
xi ħaġa bħal div ieħor, jagħlqu dan

602
00:28:14,940 --> 00:28:17,800
tag, u jagħmlu qiegħ tal-paġna.

603
00:28:17,800 --> 00:28:18,840
U ejja isalvawh.

604
00:28:18,840 --> 00:28:21,040
>> Allura issa ejja mmorru lura għall-fajl tiegħi.

605
00:28:21,040 --> 00:28:22,120
Underwhelming ħafna.

606
00:28:22,120 --> 00:28:25,520
Imma dak diviżjoni huwa użat għal,
taħt il-barnuża, huwa huwa attwalment

607
00:28:25,520 --> 00:28:26,920
element strutturali sbieħ.

608
00:28:26,920 --> 00:28:30,300
Huwa ma jkollu ebda estetika safejn
nistgħu naraw, minbarra, apparentement,

609
00:28:30,300 --> 00:28:31,890
tqegħid affarijiet fuq linji ġodda.

610
00:28:31,890 --> 00:28:36,290
>> Iżda l-avviż, bħala twarrib, biss laqtu
Ikteb ma taqtgħu fil HTML bhalu

611
00:28:36,290 --> 00:28:39,840
ma fl C. Għandek mnejn taħseb li dan huwa
se timplimenta distakk kbir bejn sbieħ

612
00:28:39,840 --> 00:28:41,300
il-quċċata u fil-qiegħ tal-paġna.

613
00:28:41,300 --> 00:28:43,420
Iżda huwa injorat.

614
00:28:43,420 --> 00:28:48,040
Ispazju White essenzjalment injorat
paġni web oħra mill-ewwel ħafna

615
00:28:48,040 --> 00:28:51,530
karattru bar-ispazju, jew ġarr ritorn,
li inti hit fuq il-keyboard.

616
00:28:51,530 --> 00:28:55,370
Jekk trid aktar linja pawżi, inti
jkollhom jispeċifikaw it yourself.

617
00:28:55,370 --> 00:28:59,080
>> Hekk jien ser nagħmlu ftit affarijiet
hawn biex turi x'inhu għaddej.

618
00:28:59,080 --> 00:29:02,700
Jien ser iżid attribut li
teżisti U għal darb'oħra, il-mod inti titgħallem

619
00:29:02,700 --> 00:29:07,110
dak attributi jeżisti, dak jeżistu tags,
verament, huwa referenzi online.

620
00:29:07,110 --> 00:29:09,750
HTML huwa t-tip tal-lingwa - huwa
mhux lingwa ta 'programmar.

621
00:29:09,750 --> 00:29:12,460
Huwa lingwa markup - li wara
tajba nofs siegħa, forsi, siegħa ma

622
00:29:12,460 --> 00:29:15,930
dan, inti ser żgur taqbadha, aktar
probabbli, l-idea bażika.

623
00:29:15,930 --> 00:29:20,350
U mbagħad Google search bogħod hija kollha
l-tags possibbli li inti jista 'jkun

624
00:29:20,350 --> 00:29:21,170
interessati pulzieri

625
00:29:21,170 --> 00:29:24,290
U kull l-spec, li huwa pjuttost
welcome u mħeġġa hawn.

626
00:29:24,290 --> 00:29:26,120
>> Allura issa let me imorru quddiem u
tagħmel xi ħaġa bħal din.

627
00:29:26,120 --> 00:29:28,690
Sfond bil-kulur.

628
00:29:28,690 --> 00:29:32,060
U issa, jien ser tagħmel xi ħaġa
bħall-aħmar, b'waqfa u virgola.

629
00:29:32,060 --> 00:29:33,970
U inti tista 'tagħmel dan fil-
modi differenti ftit.

630
00:29:33,970 --> 00:29:36,770
Jien biss tip ta 'ittajpjar bħala super
espliċitament kemm jista 'jkun.

631
00:29:36,770 --> 00:29:41,960
>> Iżda jirriżulta li dan il-valur hawnhekk huwa
dak li sejjaħ CSS, Cascading Style

632
00:29:41,960 --> 00:29:43,700
Folji, li huwa ieħor
lingwa għal kollox.

633
00:29:43,700 --> 00:29:46,770
CSS m'għandha x'taqsam xejn ma '
miftuħa tags u tikketti qrib.

634
00:29:46,770 --> 00:29:48,230
Hija għandha tagħmel il-proprjetajiet.

635
00:29:48,230 --> 00:29:52,660
>> U l-proprjetajiet huma sempliċement użu ewlieni
pari, li jfisser biss uħud kelma,

636
00:29:52,660 --> 00:29:54,680
kolon, u mbagħad ftit kelma oħra.

637
00:29:54,680 --> 00:29:57,940
U jekk għandek dawk multipli, jew biss
wieħed hawn, inti tista 'tispiċċa dan bil-

638
00:29:57,940 --> 00:29:59,390
virgola, biss għaċ-ċarezza.

639
00:29:59,390 --> 00:30:01,370
Iżda dan, wisq, se jaħdem hawn.

640
00:30:01,370 --> 00:30:02,500
>> Issa x'inhu dan se jagħmlu?

641
00:30:02,500 --> 00:30:03,610
Inti tista 'probabbilment raden.

642
00:30:03,610 --> 00:30:05,930
Let me imorru quddiem u rikarigu din il-paġna.

643
00:30:05,930 --> 00:30:07,300
U issa huwa verament ġejjin flimkien.

644
00:30:07,300 --> 00:30:09,150
Allura fuq tal-paġna tiegħi huwa aħmar.

645
00:30:09,150 --> 00:30:12,380
Imma x'hemm prinċipali hawnhekk hija li, semmejt
qabel, li div jagħtik

646
00:30:12,380 --> 00:30:13,220
diviżjoni tal-paġna.

647
00:30:13,220 --> 00:30:14,410
U li tassew dak li tagħmel.

648
00:30:14,410 --> 00:30:17,920
Hija essenzjalment taqsam il-paġna fil-
rettangolu li inti tista 'mbagħad

649
00:30:17,920 --> 00:30:18,720
jimmanipulaw.

650
00:30:18,720 --> 00:30:22,330
>> U dan il-kunċett ta 'rettangoli huwa tip ta'
konvinċenti peress li, jekk taħseb ta '

651
00:30:22,330 --> 00:30:26,410
aktar xi website, hemm probabilment
xi struttura lilha.

652
00:30:26,410 --> 00:30:29,620
Ħafna mill inti probabilment rarament li jseħħu
Homepage Facebook jekk int illoggjat

653
00:30:29,620 --> 00:30:30,440
fil-ħin kollu.

654
00:30:30,440 --> 00:30:33,920
>> Imma fuq home page Facebook, hemm
xi tip ta 'div tul il-quċċata.

655
00:30:33,920 --> 00:30:36,140
U jista 'ma jkunx sempliċi
bħala div wieħed, iżda hemm

656
00:30:36,140 --> 00:30:37,560
reġjun rettangolari hemm.

657
00:30:37,560 --> 00:30:40,290
Il-bqija tal-paġna huwa simili
a div enormi, bħal ħafna

658
00:30:40,290 --> 00:30:41,910
reġjun rettangolari akbar.

659
00:30:41,910 --> 00:30:44,540
Allura storja twila fil-qosor, biss billi
dawn il-blokok tal-bini ftit, l-

660
00:30:44,540 --> 00:30:49,250
abbiltà li affarijiet mudell bħala rettangoli,
jekk wiesgħa jew dejqa, inti tista 'ukoll

661
00:30:49,250 --> 00:30:53,680
jagħmlu kolonni potenzjalment, jippermettilek li
jistabbilixxu l-paġni, verament, madankollu inti

662
00:30:53,680 --> 00:30:54,100
jixtieq.

663
00:30:54,100 --> 00:30:56,170
Aħna verament ftit grif
il-wiċċ hawnhekk.

664
00:30:56,170 --> 00:30:59,820
>> Tabilħaqq, jekk I do wieħed ieħor,
let me imorru quddiem u tagħmel stil,

665
00:30:59,820 --> 00:31:05,410
isfond bil-kulur, aħna ser nagħmlu xi ħaġa
bħal blu, kwotazzjonijiet qrib.

666
00:31:05,410 --> 00:31:06,620
Ejja rikarigu dan.

667
00:31:06,620 --> 00:31:08,260
Allura issa huwa jkollna saħansitra uglier.

668
00:31:08,260 --> 00:31:11,520
Imma issa I jistgħu tip ta 'juru off
P tiegħi stabbiliti ħames ħiliet, id-dritt?

669
00:31:11,520 --> 00:31:12,690
Red.

670
00:31:12,690 --> 00:31:15,640
Huwa jfakkar me tal RGB, Red
Green triples Blue.

671
00:31:15,640 --> 00:31:19,330
Ukoll, jirriżulta fl-ipprogrammar tal-web,
jew disinn web, li huwa dan, konna

672
00:31:19,330 --> 00:31:21,650
għadha programmati xejn
per se, inti tista 'attwalment

673
00:31:21,650 --> 00:31:22,880
jkollhom kodiċi hexadeċimali.

674
00:31:22,880 --> 00:31:26,480
Allura xi ħaġa ħaġa, xi ħaġa
xi ħaġa, xi ħaġa ħaġa.

675
00:31:26,480 --> 00:31:30,650
Allura inti jista 'jkollhom sitt hexadecimal
karattri, jew tliet, f'xi każijiet,

676
00:31:30,650 --> 00:31:33,480
u kull waħda minn dawn trade marks in kwistjoni
Irid ikun hemm numri hexadecimal,

677
00:31:33,480 --> 00:31:34,985
żero permezz f.

678
00:31:34,985 --> 00:31:41,000
>> Jekk irrid li jkollhom ħafna ta 'aħmar, u
ebda aħdar, u l-ebda blu, x'inhu l-

679
00:31:41,000 --> 00:31:43,740
oppost ta 'zero meta jużaw hex?

680
00:31:43,740 --> 00:31:44,480
Huwa f.

681
00:31:44,480 --> 00:31:51,130
So I tista 'tagħmel ff, zero zero, zero zero,
Ħlief dan, u issa wasal stabbiliti hawn.

682
00:31:51,130 --> 00:31:52,700
U jien ma attwalment tara bidla.

683
00:31:52,700 --> 00:31:56,230
Allura unquote kwotazzjoni "aħmar" hija apparentement
sinonimu għal kulħadd aħmar,

684
00:31:56,230 --> 00:31:57,610
ebda aħdar, l-ebda blu.

685
00:31:57,610 --> 00:31:59,960
Sadanittant, ejja bidla deliberatament
dan wieħed li tkun xi ħaġa

686
00:31:59,960 --> 00:32:01,210
każwali, bħall ABCDF.

687
00:32:01,210 --> 00:32:03,790

688
00:32:03,790 --> 00:32:05,860
>> Ejja naraw dak li hu.

689
00:32:05,860 --> 00:32:08,530
Huwa tassew sbieħ blu,
attwalment, baby blu.

690
00:32:08,530 --> 00:32:11,820
Kull dritt, hekk dawn huma biss issa
kombinazzjonijiet kemmxejn każwali ta '

691
00:32:11,820 --> 00:32:12,210
karattri.

692
00:32:12,210 --> 00:32:13,410
Allura aħna mhux se tikseb bogged fil hawn.

693
00:32:13,410 --> 00:32:15,930
Iżda għal darb'oħra, dan titkellem mal-preċiżjoni
li inti tista 'tibda

694
00:32:15,930 --> 00:32:19,090
japplikaw - anki jekk int ħafna megħlub
mill-estetika.

695
00:32:19,090 --> 00:32:21,750
Fil-fatt, jekk int verament tixtieq li tkun
impressjonat, let me imorru quddiem u l-bidla

696
00:32:21,750 --> 00:32:23,500
id-daqs tat-tipa, per eżempju.

697
00:32:23,500 --> 00:32:25,960
U avviż-virgola, li
huwa meħtieġ hemmhekk.

698
00:32:25,960 --> 00:32:29,570
>> Daqs tat-tipa, nistgħu jkun biss redikoli
hawn, 96 punt.

699
00:32:29,570 --> 00:32:31,280
Ħlief dan.

700
00:32:31,280 --> 00:32:33,670
Ara naqra, li qies ta 'tipa kbira.

701
00:32:33,670 --> 00:32:35,490
Kull dritt, hekk huwa faċli ħafna.

702
00:32:35,490 --> 00:32:38,260
U fil-fatt, int essenzjalment tara
l-ewwel paġna web I magħmula

703
00:32:38,260 --> 00:32:40,060
snin ilu, meta I ewwel
tgħallmu dan il-għalf.

704
00:32:40,060 --> 00:32:42,190
Huwa faċli ħafna biex jagħmlu ħafna
affarijiet hideous malajr.

705
00:32:42,190 --> 00:32:46,115
>> U jekk int familjari ma 'l-Wayback
Magni fuq archive.org, inti

706
00:32:46,115 --> 00:32:48,210
tista 'ssib kollha hideous tiegħi
paġni web Undergrad.

707
00:32:48,210 --> 00:32:50,090
Wieħed kellu Kermit l-żrinġijiet fuq il-front.

708
00:32:50,090 --> 00:32:53,150
I marru permezz ta 'fażi fejn ħsibt
kien jibred li jieħu l-isfond ta '

709
00:32:53,150 --> 00:32:56,320
purtiera ħamra, meta tgħallimt kif inti
tista immaġini maduma darb'oħra, u għal darb'oħra, u

710
00:32:56,320 --> 00:32:59,540
għal darb'oħra, biex timla paġna ma
purtiera ħamra big tacky.

711
00:32:59,540 --> 00:33:03,120
U mbagħad, fuq quċċata ta 'dan, kien ikona
li inti kellhom ikklikkja biex jidħol dar tiegħi

712
00:33:03,120 --> 00:33:04,960
paġna minħabba li kien
ħafna fil Vogue.

713
00:33:04,960 --> 00:33:08,870
>> U allura l-ewwel programm tiegħi I qatt kiteb
ma kienx fil-PHP, iżda f'lingwa

714
00:33:08,870 --> 00:33:12,260
imsejħa Pearl, kiteb ktieb mistieden, li
hija ħaġa verament jibred li

715
00:33:12,260 --> 00:33:14,250
Ħafna nies jistennew li inti
li jkollhom fuq home-page.

716
00:33:14,250 --> 00:33:17,510
Meta ikollok il-paġna, huma jridu li inti
li jiffirma fis, u jgħidu min int,

717
00:33:17,510 --> 00:33:18,720
u għaliex int hemm.

718
00:33:18,720 --> 00:33:21,320
Dan huwa ferm 1990 web disinn stil.

719
00:33:21,320 --> 00:33:24,130
>> Iżda dawn il-ġranet, żgur, aħna ħadthom
come ħafna farther.

720
00:33:24,130 --> 00:33:27,560
U tkun taf tara, fis-sezzjoni, u anki
fil-problema stabbilita seba, billi

721
00:33:27,560 --> 00:33:31,570
lieva libreriji dawn il-ġranet,
huwa daqstant faċli li tagħmel

722
00:33:31,570 --> 00:33:33,400
affarijiet prettier malajr.

723
00:33:33,400 --> 00:33:36,550
Really hawn, aħna qed biss grif
il-wiċċ ta 'x'tista' tagħmel

724
00:33:36,550 --> 00:33:37,400
stylistically.

725
00:33:37,400 --> 00:33:41,660
>> U fil-fatt, diġà, let me jenfasizzaw
li dan diġà jkollna ikrah, ma

726
00:33:41,660 --> 00:33:46,030
biss estetikament, iżda wkoll f'termini
ta 'stil ta' kodiċi tiegħi, jew il-

727
00:33:46,030 --> 00:33:47,260
disinn tal-kodiċi tiegħi.

728
00:33:47,260 --> 00:33:52,350
I bħalissa għandhom comingled HTML, li
huwa l-tags miftuħa aħdar hemmhekk, ma

729
00:33:52,350 --> 00:33:55,160
Proprjetajiet CSS, li
huwa totalment leġittimu.

730
00:33:55,160 --> 00:33:57,200
Dan huwa verament fejn il-lingwa
kienet l-oriġini tagħha.

731
00:33:57,200 --> 00:34:01,030
>> Iżda fl-interess ta 'disinn nadif,
ferm simili bdejna Jittieħed factoring

732
00:34:01,030 --> 00:34:05,370
barra mill-fajls C fis. fajls h, let
me attwalment prattika li tip ta '

733
00:34:05,370 --> 00:34:07,990
prinċipju u jibdew jagħmlu
dan minflok.

734
00:34:07,990 --> 00:34:13,280
Let me tpoġġi tag stil up hawn, li
teżisti wkoll fil-HTML, u let me

735
00:34:13,280 --> 00:34:15,330
jispeċifikaw dan li ġej.

736
00:34:15,330 --> 00:34:16,360
Let me tħassar din.

737
00:34:16,360 --> 00:34:18,110
Isfond bil-kulur se jkun aħmar.

738
00:34:18,110 --> 00:34:19,800
Jien ser jitħassar dan kompletament.

739
00:34:19,800 --> 00:34:22,580
Jien ser jeħles mill-istil
attribut, u jien ser unikament

740
00:34:22,580 --> 00:34:24,620
jidentifikaw dan div ma 'kelma -

741
00:34:24,620 --> 00:34:28,750
arbitrarju, iżda raġonevolment, kwotazzjoni
unquote "top." U id huwa speċjali

742
00:34:28,750 --> 00:34:32,530
attribut li jiddefinixxi unikament
element HTML ċerti

743
00:34:32,530 --> 00:34:33,850
bħala li dik id.

744
00:34:33,850 --> 00:34:37,969
>> Jekk I issa jridu stilizzata dan, up hawn
il-kap tal-paġna tiegħi, ġewwieni tal-

745
00:34:37,969 --> 00:34:41,730
tag stil, avviż li
I tista 'tagħmel top hash.

746
00:34:41,730 --> 00:34:45,300
U mbagħad I tista 'tpoġġi ftit kaboċċi
braces, reminixxenti ta 'C, u mbagħad ħalli

747
00:34:45,300 --> 00:34:47,130
me paste f'dak stylization.

748
00:34:47,130 --> 00:34:49,929
U let me imorru quddiem u jantiċipaw hawn
fejn jien jmorru ma 'dan.

749
00:34:49,929 --> 00:34:53,380
Let me wkoll toħloq waħda
għall-div qiegħ.

750
00:34:53,380 --> 00:34:58,010
Let me grab dan il-kodiċi hideous minn isfel
hawn, poġġih fil hawn, u jien ser tkun

751
00:34:58,010 --> 00:35:00,770
ftit aktar anali issa u stilizzata li
bi ftit tqegħid affarijiet fuq tagħhom stess

752
00:35:00,770 --> 00:35:02,540
linja, li jintemm semicolons.

753
00:35:02,540 --> 00:35:04,430
Let me jeħles mill-istil tag.

754
00:35:04,430 --> 00:35:05,320
>> Imma jien ma isir s'issa.

755
00:35:05,320 --> 00:35:07,406
I bżonn tagħmel ħaġa waħda oħra.

756
00:35:07,406 --> 00:35:10,070
Yeah, id ugwali kwotazzjoni unquote, "qiegħ,"
jew kwalunkwe id Irrid

757
00:35:10,070 --> 00:35:11,740
jagħtu dak l-element.

758
00:35:11,740 --> 00:35:13,420
Issa, let me jmorru lura minn hawn.

759
00:35:13,420 --> 00:35:14,360
U dan huwa atroċi.

760
00:35:14,360 --> 00:35:15,805
I ma jistax jittratta ma 96 punt.

761
00:35:15,805 --> 00:35:16,960
Ejja nagħmlu 24 punt.

762
00:35:16,960 --> 00:35:18,320
Jew inti tista 'tkun aktar preċiża.

763
00:35:18,320 --> 00:35:21,800
Inti tista 'attwalment tuża pixels, PX, sabiex
li int verament tikseb qamħ ifjen

764
00:35:21,800 --> 00:35:23,220
kontroll fuq il-paġna tiegħek.

765
00:35:23,220 --> 00:35:26,860
>> Bħala twarrib, li mhux neċessarjament
l-aħjar ħaġa jekk l-utenti, għall-

766
00:35:26,860 --> 00:35:29,650
raġunijiet aċċessibbiltà, trid
tkun kapaċi li żżid daqsijiet.

767
00:35:29,650 --> 00:35:32,650
Allura jirrealizzaw li hemm modi ta 'kif isir
affarijiet li mhux bilfors

768
00:35:32,650 --> 00:35:34,230
kollox hard kodiċi.

769
00:35:34,230 --> 00:35:37,220
>> Kull dritt, hekk huwa akbar, 24 punt,
minn ikun x'ikun l-default.

770
00:35:37,220 --> 00:35:38,630
Iżda issa huwa aktar nadifa ftit.

771
00:35:38,630 --> 00:35:40,230
U let me jieħdu dan il-pass wieħed ulterjuri.

772
00:35:40,230 --> 00:35:47,220
Eżattament bħall-idea ta 'fajls header,
avviż aħna qed pass eqreb lejn dan.

773
00:35:47,220 --> 00:35:52,000
Għandi out fatturati, iżda xorta ħallew,
ġewwa tal-paġna tiegħi, dawk ir-regoli CSS.

774
00:35:52,000 --> 00:35:56,200
Għaliex jista I tixtieq li tieħu dan il-pass wieħed
ulterjuri, neħħi dan għal kollox, u

775
00:35:56,200 --> 00:35:59,860
poġġih fil-fajl separat?

776
00:35:59,860 --> 00:36:01,070
>> So I tista 'użu mill-ġdid, id-dritt?

777
00:36:01,070 --> 00:36:03,155
Dan huwa biss tip ta 'intwizzjoni
dritt issa.

778
00:36:03,155 --> 00:36:06,340
Qabel, I qal li kien biss
jkollna ikrah li l-istil

779
00:36:06,340 --> 00:36:08,480
attributi ġewwa tal-
divs infushom.

780
00:36:08,480 --> 00:36:09,750
Iżda biss tip ta 'jaħsbu li permezz.

781
00:36:09,750 --> 00:36:13,560
Kif page tiegħek jitbaxxa aktar u aktar, jekk
int tqegħid hawn, u hawn, u

782
00:36:13,560 --> 00:36:18,350
hawn, u hawn, dawn kollha differenti
kuluri, u daqsijiet font, u oħrajn bħal dawn

783
00:36:18,350 --> 00:36:22,550
attributi, il-paġna tiegħek huwa malajr ħafna
se ssir maniġjabbli għalik.

784
00:36:22,550 --> 00:36:24,570
>> Jekk xi ħadd jidħol sa inti u
jgħid, oh, inti taf liema?

785
00:36:24,570 --> 00:36:28,070
I d verament jixtieq li Tibdilx id-daqs tat-tipa
minn żewġ punti addizzjonali, inti

786
00:36:28,070 --> 00:36:31,275
jista 'jkollok tmur u ssib u jissostitwixxi
numru kbir ta 'linji ta' kodiċi.

787
00:36:31,275 --> 00:36:35,170
Huwa ħafna aktar konvinċenti li tiċċentralizza
kollha estetika bħal dawn hawn.

788
00:36:35,170 --> 00:36:38,850
Imma jekk inti tixtieq li użu mill-ġdid dawk
estetika fl paġni web multipli, kollha

789
00:36:38,850 --> 00:36:41,100
l-aktar konvinċenti biex, għal
Pereżempju, toħloq fajl

790
00:36:41,100 --> 00:36:45,290
imsejħa ma 'dawk kontenuti.

791
00:36:45,290 --> 00:36:46,680
>> U let me tagħmel dan.

792
00:36:46,680 --> 00:36:51,150

793
00:36:51,150 --> 00:36:51,920
Ħlief dan il-fajl.

794
00:36:51,920 --> 00:36:55,580
I say styles.css, arbitrarja,
iżda konvenzjonali.

795
00:36:55,580 --> 00:36:58,770
I ser poġġih fid-dar John Harvard
Direttorju issa għas-sempliċità.

796
00:36:58,770 --> 00:37:03,880
U dak I tista 'tagħmel fil-paġna web tiegħi huwa li tikseb
rid tal-lametta stil għal kollox,

797
00:37:03,880 --> 00:37:08,270
u kemmxejn unintuitively, uża link
tag, li ma jagħtuk rabta fil

798
00:37:08,270 --> 00:37:13,140
l-hyperlink, sens clickable, iżda
fejn I say link, href ugwali

799
00:37:13,140 --> 00:37:15,120
styles.css.

800
00:37:15,120 --> 00:37:20,050
U r-relazzjoni li dan l-element
jkun ma 'l-web page huwa li jservu bħala

801
00:37:20,050 --> 00:37:21,280
karta tal-istil tagħha.

802
00:37:21,280 --> 00:37:22,670
>> Allura kif ma naf dan?

803
00:37:22,670 --> 00:37:25,950
Waħda, inti biss aqra l-manwal,
jew inti Google madwar, u inti

804
00:37:25,950 --> 00:37:27,000
tħares lejn diversi riżorsi.

805
00:37:27,000 --> 00:37:30,520
I mean, li verament huwa kif inti pick up
tekniki bħal dan, u, konsistenti

806
00:37:30,520 --> 00:37:34,720
ma din l-idea tat-tagħlim lilu nnifsu ġdida
lingwi, għal darb'oħra, inti ser issib li

807
00:37:34,720 --> 00:37:38,830
hemm biss numru finit ta 'affarijiet
għal kwalunkwe lingwa li, ladarba ikollok

808
00:37:38,830 --> 00:37:41,310
minnhom, inti ser issib li jiġrilha
aktar mgħaġġel u aktar malajr li tikteb.

809
00:37:41,310 --> 00:37:44,180
Tabilħaqq, it-tagħlim ta 'programmazzjoni l-ġdid
lingwa hija tant mgħaġġla minn ġdida

810
00:37:44,180 --> 00:37:47,380
lingwa mitkellma minħabba dawn l-affarijiet
huma ħafna iżgħar u ħafna aktar

811
00:37:47,380 --> 00:37:48,820
iddefinit b'mod preċiż.

812
00:37:48,820 --> 00:37:51,590
>> Imma stajt enfasizzat daqsxejn
ta anomalija hawn.

813
00:37:51,590 --> 00:37:57,750
Għaliex I enfasizzaw dan
quddiem mmejla hawn?

814
00:37:57,750 --> 00:37:59,420
Minħabba I jkollhom mill-qrib l-tikketta.

815
00:37:59,420 --> 00:38:00,530
I għandhom tagħlaq il-tag.

816
00:38:00,530 --> 00:38:02,750
U inti ser issib riżorsi innumerabbli
online li ma

817
00:38:02,750 --> 00:38:04,080
neċessarjament tags qrib.

818
00:38:04,080 --> 00:38:08,770
U realistiku, mhuwiex strettament
meħtieġa għall teknika u hemm

819
00:38:08,770 --> 00:38:11,950
raġunijiet ta 'realtà, browsers huma biss
pjuttost tolleranti ta 'żbalji fil-web

820
00:38:11,950 --> 00:38:14,360
paġni, għall-aħjar jew għall-agħar,
imma l-aktar għall-agħar.

821
00:38:14,360 --> 00:38:18,830
>> Allura dan hawnhekk huwa biss mod cleaner ta '
tgħid xi ħaġa stupid bħal dan,

822
00:38:18,830 --> 00:38:22,330
fejn jekk inti tixtieq li tiftaħ il-link tag
iżda qrib dan, hemm verament ebda idea

823
00:38:22,330 --> 00:38:23,720
ta 'kontenut għal tag link.

824
00:38:23,720 --> 00:38:26,000
Dan ifisser biss tagħbija dan
fajl u poġġih hawn.

825
00:38:26,000 --> 00:38:30,610
Huwa simili sharp jinkludu fl C. Tista '
tiftaħ u tagħlaq tag kollha f'daqqa

826
00:38:30,610 --> 00:38:31,660
fl-istess tag.

827
00:38:31,660 --> 00:38:33,520
U hemm eżempji oħra ta 'dan.

828
00:38:33,520 --> 00:38:37,280
Dan mhuwiex il-mod biex isir dan, iżda
il-lametta br, għal pawżi linja, jekk I

829
00:38:37,280 --> 00:38:41,780
verament riedu jiksbu dak I kien
jippruvaw qabel billi jolqot Daħħal, jekk

830
00:38:41,780 --> 00:38:45,380
I espliċitament jgħidu linja break, linja break,
linja break, linja break, u

831
00:38:45,380 --> 00:38:49,100
allura rikarigu din il-paġna, issa inti ser ikollok avviż
li qiegħ tal-paġna hija,

832
00:38:49,100 --> 00:38:51,940
tabilħaqq, ħafna farther fl
il-qiegħ tal-paġna.

833
00:38:51,940 --> 00:38:55,840
Iżda anke li jista 'jsir ħafna aktar
nadif ma 'CSS, u b'marġini,

834
00:38:55,840 --> 00:38:58,120
u ma 'estetika ieħor
tekniki.

835
00:38:58,120 --> 00:38:59,940
>> Allura għal issa, il-takeaways huma dan.

836
00:38:59,940 --> 00:39:02,320
Fl HTML, għandna dawn
affarijiet imsejħa tags.

837
00:39:02,320 --> 00:39:04,830
Fl CSS, għandna dawn l-affarijiet
imsejħa proprjetajiet.

838
00:39:04,830 --> 00:39:08,700
Nistgħu comingle dawn iż-żewġ lingwi,
jew bl-użu tal-attribut stil,

839
00:39:08,700 --> 00:39:14,240
jew il-lametta istil, jew għadhom aħjar, factoring
it out għal kollox, kif nagħmlu

840
00:39:14,240 --> 00:39:17,270
fil-problema stabbilita 7.

841
00:39:17,270 --> 00:39:23,820
Mistoqsijiet, allura, dwar il-
baŜi kunċettwali hawn?

842
00:39:23,820 --> 00:39:24,740
>> UDJENZA: Għandi mistoqsija.

843
00:39:24,740 --> 00:39:25,630
>> SPEAKER 1: Oh, sorry.

844
00:39:25,630 --> 00:39:28,880
>> UDJENZA: Għaliex ma kienx dan kkulurita -

845
00:39:28,880 --> 00:39:31,410
>> SPEAKER 1: Oh, fil-tab oħra?

846
00:39:31,410 --> 00:39:32,232
Dan hawn?

847
00:39:32,232 --> 00:39:33,482
>> UDJENZA: Le, bħall--

848
00:39:33,482 --> 00:39:35,330

849
00:39:35,330 --> 00:39:39,480
>> SPEAKER 1: Oh, dan għaliex
I kien qed sloppy.

850
00:39:39,480 --> 00:39:41,350
I tpoġġi l-fajl fil-post żbaljat.

851
00:39:41,350 --> 00:39:47,840
Hekk jekk I attwalment poġġih hawn, u jien
chmod dan, r kollu + għall styles.css, u

852
00:39:47,840 --> 00:39:52,050
issa rikarigu-paġna, issa aħna
jiksbu l-stylization lura.

853
00:39:52,050 --> 00:39:54,530
U minħabba li l-font daqsijiet huma
differenti, aħna ma tara pjuttost kemm

854
00:39:54,530 --> 00:39:55,010
ispazju abjad.

855
00:39:55,010 --> 00:39:58,240
Aħna minflok tara x'inhu l-
default minflok.

856
00:39:58,240 --> 00:40:00,050
Good kwistjoni.

857
00:40:00,050 --> 00:40:00,846
Iva?

858
00:40:00,846 --> 00:40:02,630
>> UDJENZA: Għaliex il-link
tag ġewwa l-header?

859
00:40:02,630 --> 00:40:06,270
>> SPEAKER 1: Għaliex huwa l-links
ġewwa tag ta 'l-header -

860
00:40:06,270 --> 00:40:07,650
risposta qasira, sempliċement minħabba.

861
00:40:07,650 --> 00:40:08,930
Dan huwa dak li ġie deċiż.

862
00:40:08,930 --> 00:40:10,720
Li meta l-tags rabta imorru meta
għandek dak li jissejjaħ

863
00:40:10,720 --> 00:40:13,650
karta tal-istil esterna.

864
00:40:13,650 --> 00:40:16,430
Mistoqsijiet oħra?

865
00:40:16,430 --> 00:40:17,770
>> Kull dritt, ukoll ejja tagħmel dan.

866
00:40:17,770 --> 00:40:20,500
Għandna daqshekk gost li għandna quddiemna llum.

867
00:40:20,500 --> 00:40:22,480
Li jinsab biss grif
il-wiċċ ta 'CSS.

868
00:40:22,480 --> 00:40:23,010
Ejja nagħmlu dan.

869
00:40:23,010 --> 00:40:25,980
Ejja jieħu pawża ta 'ħames minuti hawn
għaliex, per email tiegħi, ejja hang fil

870
00:40:25,980 --> 00:40:27,200
hemm till 02:30 ish illum.

871
00:40:27,200 --> 00:40:28,540
Imma jekk inti ma jkollhom biex
leave, li l-multa.

872
00:40:28,540 --> 00:40:30,380
Iżda aħna ser nimxu 'l quddiem wara
waqfa ħames minuti.

873
00:40:30,380 --> 00:40:35,930
U aħna ser jitgħallmu ftit xi ħaġa
dwar PHP, MySQL, u aktar.

874
00:40:35,930 --> 00:40:44,520
>> Kull dritt, hekk ejja tipprova, issa, li jorbtu
ftit ta 'dawn l-ideat flimkien u jagħmlu,

875
00:40:44,520 --> 00:40:46,180
jiġifieri, search engine tagħna stess.

876
00:40:46,180 --> 00:40:48,570
I ndunat, pjuttost curiously,
dan li ġej.

877
00:40:48,570 --> 00:40:52,610
Meta inti fuq Google.com, int
tipikament fi URL bħal dan wieħed hawn

878
00:40:52,610 --> 00:40:54,870
ma 'xejn wara l-com dot.

879
00:40:54,870 --> 00:40:59,760
Imma jekk I tfittxija xi ħaġa stupid bħal
qtates, u hit Ikteb, aħna ser nikseb - mhux

880
00:40:59,760 --> 00:41:01,300
stupid, imma inti taf.

881
00:41:01,300 --> 00:41:05,410
>> OK, hekk avviż, fil-quċċata tal-paġna,
issa, il-URL ikun, naturalment, inbidlet.

882
00:41:05,410 --> 00:41:07,190
U dan mhux xejn
ġdid għal kull wieħed minna.

883
00:41:07,190 --> 00:41:09,290
Tikklikkja links u għalf
jiġri fuq il-web.

884
00:41:09,290 --> 00:41:11,420
Imma x'hemm interessanti hawn
huwa dan li ġej.

885
00:41:11,420 --> 00:41:14,500
Hemm lott kollu ta 'eki mhux mixtieqa, iżda let
me armih għalf li jien ma

886
00:41:14,500 --> 00:41:16,600
pjuttost jifhmu jew ma
verament tħares rilevanti.

887
00:41:16,600 --> 00:41:18,490
>> Let me teħles minn dan.

888
00:41:18,490 --> 00:41:20,030
Let me teħles minn dan.

889
00:41:20,030 --> 00:41:22,630
U let me biss jeħles
ta 'dan kollu.

890
00:41:22,630 --> 00:41:28,840
U issa avviż li l-qtates hija fil-URL,
segwit bi q, allura ugwali

891
00:41:28,840 --> 00:41:29,710
sinjal quddiem ta 'dan.

892
00:41:29,710 --> 00:41:32,110
Għalhekk jirriżulta li dan huwa kif l-
mod kif jaħdem meta niġu

893
00:41:32,110 --> 00:41:33,360
għall-input u output.

894
00:41:33,360 --> 00:41:37,510
>> Imxejna twil tkellem dwar
kaxxi suwed, id-dritt?

895
00:41:37,510 --> 00:41:41,650
Hekk jekk dan huwa funzjoni implimentata
hawn bħala kaxxa sewda, hija tieħu input

896
00:41:41,650 --> 00:41:45,290
u tipproduċi output, ukoll, il-mezzi
li bih inti tipprovdi input għal

897
00:41:45,290 --> 00:41:49,270
websajt huwa permezz, ta 'spiss, ta' URLs tagħha.

898
00:41:49,270 --> 00:41:52,850
Inti sempliċiment ipoġġu marka kwistjoni
u mbagħad ewlieni ugwali valur.

899
00:41:52,850 --> 00:41:56,740
U allura forsi ampersand, u mbagħad
ewlieni ieħor ugwali valur, allura forsi

900
00:41:56,740 --> 00:41:58,810
ampersand ieħor, ewlenin ugwali valur.

901
00:41:58,810 --> 00:42:03,030
Thats kif inti tgħaddi fil-ċwievet u
valuri, pari ta 'inputs.

902
00:42:03,030 --> 00:42:07,050
>> Mela jekk jien hit Ikteb issa, x'hemm
interessanti dwar Google hija li kollha

903
00:42:07,050 --> 00:42:10,420
li eki mhux mixtieqa I imħassar ma jidhirx
li jkun strettament neċessarju.

904
00:42:10,420 --> 00:42:15,120
All I bżonn li tibgħat lill-Google hija kwistjoni
mark q ugwali qtates biex tikseb

905
00:42:15,120 --> 00:42:16,160
lura xi qtates.

906
00:42:16,160 --> 00:42:20,160
Ukoll, l-implikazzjoni ta 'dan, allura,
hija jekk I pull up gedit, stajt beda

907
00:42:20,160 --> 00:42:24,360
jagħmlu search engine tiegħi stess hawn
fil-fajl imsejjaħ seach0.html.

908
00:42:24,360 --> 00:42:26,750
>> U let me imorru quddiem u ħassar
linja waħda aktar li inti

909
00:42:26,750 --> 00:42:27,910
ma kellhomx tara.

910
00:42:27,910 --> 00:42:31,070
U issa, let me go fil-browser tiegħi stess,
hekk ma Google, u mur

911
00:42:31,070 --> 00:42:34,900
http://localhost.

912
00:42:34,900 --> 00:42:36,220
U li għaddej biex jiksbu fil-mod.

913
00:42:36,220 --> 00:42:43,240
Allura aħna qed tmur biex ngħid addiju
li għal issa, jimxu dan hawn fuq,

914
00:42:43,240 --> 00:42:46,270
oh, issa aħna qed tmur biex ikollhom
jgħidu addiju għal dan il-fajl.

915
00:42:46,270 --> 00:42:51,700
>> Kull meta għandek fajl imsejjaħ
index.html jew index.php fil-

916
00:42:51,700 --> 00:42:54,980
direttorju, jekk il-web server huwa
konfigurati b'dan il-mod, dak li inti ser

917
00:42:54,980 --> 00:42:59,600
tara, awtomatikament, hija l-kontenut ta 'dik
fajl minflok ma tingħata lista ta 'l-

918
00:42:59,600 --> 00:43:02,330
direttorju, kif jien ridt hawn.

919
00:43:02,330 --> 00:43:03,750
Aktar dwar dan fil-spec.

920
00:43:03,750 --> 00:43:04,610
Inti ma tara li.

921
00:43:04,610 --> 00:43:06,360
>> Allura dan huwa dak I attwalment riedu.

922
00:43:06,360 --> 00:43:08,810
Iżda mument ilu, kien hemm
fajl f'dan folder imsejjaħ

923
00:43:08,810 --> 00:43:11,290
index.html u index.php.

924
00:43:11,290 --> 00:43:13,380
U għalhekk l-web server kien
juru lili dawn il-fajls.

925
00:43:13,380 --> 00:43:15,900
Minflok, nixtieq dan id-direttorju
jelenka hawn.

926
00:43:15,900 --> 00:43:18,340
>> Hekk jien se jmorru fil
CSS u mur search0.

927
00:43:18,340 --> 00:43:21,770
U jien jsostnu li dan huwa se jkun
il-bidu ta 'swieq kompetittivi tiegħi stess

928
00:43:21,770 --> 00:43:22,490
search engine.

929
00:43:22,490 --> 00:43:27,630
U biex tagħmel dan, jien se jmorru fil-
hawn, fil CSS, u jiftħu ma

930
00:43:27,630 --> 00:43:30,190
gedit, search 0.

931
00:43:30,190 --> 00:43:32,280
Iżda sfortunatament, hemm
mhux wisq jiġri hawn fuq.

932
00:43:32,280 --> 00:43:35,690
All I ma kien juża intestatura tikketta, li
jiġri li għandu jissejjaħ h1, li

933
00:43:35,690 --> 00:43:38,180
essenzjalment ifisser kbar u
grassa, u thats it.

934
00:43:38,180 --> 00:43:40,810
Iżda l-mezzi li bihom nistgħu
jipprovdu inputs huma permezz ta 'dawn

935
00:43:40,810 --> 00:43:42,180
affarijiet imsejħa formoli.

936
00:43:42,180 --> 00:43:46,040
>> So let me go quddiem u tinfetaħ u tingħalaq,
preemptively, tag formola hemmhekk.

937
00:43:46,040 --> 00:43:48,060
U let me imorru quddiem u tagħmel
xi ħaġa bħal din.

938
00:43:48,060 --> 00:43:51,430
Input, tip ugwali test.

939
00:43:51,430 --> 00:43:56,320
U mbagħad ejja qrib l-tikketta fi ħdan
il-parentesi nfushom.

940
00:43:56,320 --> 00:43:58,800
I m'għandhomx bżonn biex tibda qasam tat-test
u stop qasam test.

941
00:43:58,800 --> 00:44:01,080
Huwa biss se jkun hemm jew le.

942
00:44:01,080 --> 00:44:06,210
>> U allura hawn taħt li, ejja tagħmel
tip input ugwali jissottomettu.

943
00:44:06,210 --> 00:44:06,870
Ħlief dan.

944
00:44:06,870 --> 00:44:08,630
U issa ejja biss ma
sanità malajr check.

945
00:44:08,630 --> 00:44:09,820
Ejja rikarigu.

946
00:44:09,820 --> 00:44:10,890
>> OK, dan huwa mhux ħażin.

947
00:44:10,890 --> 00:44:13,260
Mhuwiex stil Google,
iżda huwa pjuttost qrib.

948
00:44:13,260 --> 00:44:13,920
Hemm qasam tat-test.

949
00:44:13,920 --> 00:44:17,190
I tista tip xi għalf fl, hit Ikteb,
iżda jiġri xejn s'issa.

950
00:44:17,190 --> 00:44:21,090
U dan għaliex jien mhux speċifikat
azzjoni għal din il-formola, biex ngħidu hekk.

951
00:44:21,090 --> 00:44:23,860
Mela jekk jien jmorru lura għall-element forma,
jirriżulta, u naf dan biss

952
00:44:23,860 --> 00:44:27,460
milli jkollhom aqra d-dokumentazzjoni, li
il-lametta forma jieħu attribut

953
00:44:27,460 --> 00:44:31,880
imsejjaħ azzjoni li l-URL
tal-websajt li inti

954
00:44:31,880 --> 00:44:34,790
trid tibgħat il-formola.

955
00:44:34,790 --> 00:44:37,610
>> I ma verament think we jkollhom il-ħin biex
jimplimentaw il-aħħar lura kollu għal

956
00:44:37,610 --> 00:44:38,570
tfittxija illum engine.

957
00:44:38,570 --> 00:44:41,900
Allura aħna qed biss se ngħid, eh,
mur google.com / tfittxija.

958
00:44:41,900 --> 00:44:43,450
U issa let me qrib kwotazzjonijiet tiegħi.

959
00:44:43,450 --> 00:44:46,070
U let me tispeċifika wkoll li
il-metodu li tuża va

960
00:44:46,070 --> 00:44:47,120
li għandu jissejjaħ tikseb.

961
00:44:47,120 --> 00:44:50,650
>> Long storja qasira, hemm żewġ modi, fi
inqas, li inti tista 'tissottometti informazzjoni

962
00:44:50,650 --> 00:44:51,880
mill-browser biex server.

963
00:44:51,880 --> 00:44:55,340
Wieħed hu li tikseb, u, għal skopijiet tal-lum,
li ifisser biss fil-URL.

964
00:44:55,340 --> 00:44:58,730
You see eżattament l-trade marks in kwistjoni, il-
ugwali sinjali, u ampersands li

965
00:44:58,730 --> 00:44:59,780
rajna qabel.

966
00:44:59,780 --> 00:45:02,890
Jew hemm xi imsejħa post alternattiv.

967
00:45:02,890 --> 00:45:06,490
Għal issa, jafu li post spiss jintuża
meta inti tixtieq li upload fajls, bħal

968
00:45:06,490 --> 00:45:09,820
stampi u oħrajn, jew meta inti tixtieq li
jissottomettu informazzjoni karta ta 'kreditu, jew

969
00:45:09,820 --> 00:45:13,810
passwords, xi ħaġa li hija ma
verament jagħmel sens, kunċettwalment, jew

970
00:45:13,810 --> 00:45:18,020
sigurtà għaqli, li jispiċċaw fil-URL tal
browser tiegħek, fejn snooping ġenituri,

971
00:45:18,020 --> 00:45:21,520
jew roommates, jew xi ħadd b'aċċess
lill-kompjuter tiegħek tista 'tara.

972
00:45:21,520 --> 00:45:23,110
>> Mela ejja ħlief li hawn.

973
00:45:23,110 --> 00:45:24,480
U għandi bżonn biex jagħmlu ħaġa waħda oħra.

974
00:45:24,480 --> 00:45:27,250
Ma biżżejjed biss biex
jgħidu jagħtu me qasam tat-test.

975
00:45:27,250 --> 00:45:29,850
I għandhom jagħtu dik kamp
valur isem.

976
00:45:29,850 --> 00:45:34,500
So let me jissellef għażla ta 'Google
ismijiet, q, u tispeċifika li t-tieni

977
00:45:34,500 --> 00:45:38,150
attribut I ma verament jimpurtak
l-isem tal-buttuna Submit.

978
00:45:38,150 --> 00:45:40,890
All I jimpurtahom qed jissottometti
Liema tipi l-utent pulzieri

979
00:45:40,890 --> 00:45:41,940
>> U issa dan huwa tip ta ikrah.

980
00:45:41,940 --> 00:45:42,820
Huwa biss jgħid jissottomettu.

981
00:45:42,820 --> 00:45:46,350
Jirriżulta, u naf dan mill-
dokumentazzjoni, I jistgħu attwalment ngħid

982
00:45:46,350 --> 00:45:51,710
valur ugwali kwotazzjoni unquote "cs50
SEACH, "kwotazzjoni qrib.

983
00:45:51,710 --> 00:45:53,030
Imbagħad ejja rikarigu-ġdid.

984
00:45:53,030 --> 00:45:57,020
So I iżommu laqtu Kmand-R, jew
Control-R fuq it-tastiera tiegħi biex jerġgħu jitgħabbew.

985
00:45:57,020 --> 00:45:58,605
>> Issa għandna aktar interessanti
search engine.

986
00:45:58,605 --> 00:46:00,340
Ma pjuttost dehra
Google għadhom, għalkemm.

987
00:46:00,340 --> 00:46:04,100
Mela ejja imorru quddiem fil hawn u
jagħmlu waqfa linja ftit.

988
00:46:04,100 --> 00:46:06,066
>> OK, hekk issa għandna Google.

989
00:46:06,066 --> 00:46:08,260
Aħna fil-fatt kważi do jkollhom Google.

990
00:46:08,260 --> 00:46:10,460
Allura issa x'inhu jiġri?

991
00:46:10,460 --> 00:46:12,220
Jien ser tip fil xi ħaġa
bħal Qtates.

992
00:46:12,220 --> 00:46:16,570
U l-browser se parse
dik il-forma li I definit.

993
00:46:16,570 --> 00:46:19,470
U li għaddej biex jibagħtu
l-utent finali għal din URL.

994
00:46:19,470 --> 00:46:23,420
Allura dan iż-żmien, għal xi raġuni kurjuż,
I ltqajna aktar informazzjoni dwar il-ħażniet

995
00:46:23,420 --> 00:46:24,410
minn madwar qtates attwali.

996
00:46:24,410 --> 00:46:30,580
Iżda li l-multa minħabba avviż aħna xorta
spiċċaw hawn, q ugwali qtates.

997
00:46:30,580 --> 00:46:35,200
>> Storja twila fil-qosor hekk, jidher pjuttost
trivjali biex tikseb input mill-utent.

998
00:46:35,200 --> 00:46:38,190
U li jkun ġust, hemm għenieqed
ta 'tipi oħra ta' forma oqsma.

999
00:46:38,190 --> 00:46:41,510
Hemm kaxxi kontroll, u ftit reċiprokament
buttuni tar-radju esklussiva, u

1000
00:46:41,510 --> 00:46:42,960
drop down menus, u aktar.

1001
00:46:42,960 --> 00:46:46,160
Iżda kollha ta 'dawn huma bħala relattivament
faċilment implimentati kif

1002
00:46:46,160 --> 00:46:48,040
f'dan il-qasam kien test.

1003
00:46:48,040 --> 00:46:52,050
U finalment, aħna biss għandhom jagħmlu
xi ħadd żgur huwa smigħ fuq l-oħra

1004
00:46:52,050 --> 00:46:56,490
aħħar tal-linja sabiex tikseb dik
informazzjoni pproċessata, b'xi, u

1005
00:46:56,490 --> 00:46:58,440
agħtina lura qtates tagħna.

1006
00:46:58,440 --> 00:47:00,840
>> Ejja nħarsu lejn ftit
eżempju aktar involuti.

1007
00:47:00,840 --> 00:47:06,020
Let me jmorru fil-direttorju Vhost tiegħi,
fis ospitanti lokali, pubbliku, u fejn I

1008
00:47:06,020 --> 00:47:06,980
tpoġġi source code tal-lum.

1009
00:47:06,980 --> 00:47:09,800
Kollha ta 'dan se jkun fuq li l-kors
website għalik biex tinker.

1010
00:47:09,800 --> 00:47:15,420
U jekk immur fis froshims, let me miftuħa
up dan il-fajl issa, froshim0.php.

1011
00:47:15,420 --> 00:47:18,460
Dan wieħed huwa a verbose ftit aktar, sabiex
aħna mhux se tikteb din mill-bidu.

1012
00:47:18,460 --> 00:47:21,970
Iżda biss tinnota issa kemmxejn ftit
karatteristiċi familjari.

1013
00:47:21,970 --> 00:47:24,550
>> Waħda, tag forma, azzjoni differenti.

1014
00:47:24,550 --> 00:47:25,670
Mhuwiex URL sħiħ.

1015
00:47:25,670 --> 00:47:29,930
Issa, huwa apparentement għall-fajl imsejjaħ
register0.php għaliex, fil-mument,

1016
00:47:29,930 --> 00:47:32,660
Jien ser jgħallem myself ftit
xi ħaġa dwar PHP, programmazzjoni

1017
00:47:32,660 --> 00:47:37,360
lingwa, għaliex PHP jistgħu jintużaw biex
jimplimentaw dak Google implimentat bħala

1018
00:47:37,360 --> 00:47:39,650
l-aħħar lura ta 'search engines tagħhom.

1019
00:47:39,650 --> 00:47:42,890
>> Google, fir-realtà, probabbilment juża
xi Python, xi C + +, u

1020
00:47:42,890 --> 00:47:44,230
għenieqed ta 'lingwi oħra.

1021
00:47:44,230 --> 00:47:48,230
Iżda nistgħu ċertament jimplimentaw tfittxija
riżultati billi tuża PHP jekk ridna.

1022
00:47:48,230 --> 00:47:49,610
Iżda għal issa, aħna ser jżommha sempliċi.

1023
00:47:49,610 --> 00:47:53,320
U dan huwa attwalment reminixxenti ta 'wieħed
mill-ewwel websites oħra I

1024
00:47:53,320 --> 00:47:54,490
magħmula sena ilu.

1025
00:47:54,490 --> 00:47:58,160
>> Lura fil-jum tiegħi, inti rreġistrat għal
isports intramurali bħala freshman minn

1026
00:47:58,160 --> 00:48:00,880
jimla biċċa karta, mixi
madwar l-tarzna, u twaqqigħ fil

1027
00:48:00,880 --> 00:48:04,890
l-mailbox ta 'Proctor b'mod
Wigglesworth, u li kien kif inti

1028
00:48:04,890 --> 00:48:05,460
reġistrati.

1029
00:48:05,460 --> 00:48:09,650
U hekk proġett tiegħi ftit wara CS50,
kien li tikkontesta din, li jagħmel perfetta

1030
00:48:09,650 --> 00:48:13,460
sens, fuq il-web, li ma kienx
kif Vogue allura kif inhu issa.

1031
00:48:13,460 --> 00:48:17,510
Imma kollox aħna kellha tagħmel kien joħolqu,
essenzjalment, forma HTML.

1032
00:48:17,510 --> 00:48:19,640
>> U li jiffurmaw ħares
bejn wieħed u ieħor bħal dan.

1033
00:48:19,640 --> 00:48:22,480
I kellhom kontribut għall-
Isem freshman tal.

1034
00:48:22,480 --> 00:48:27,780
Kelli ieħor kaxxa kontroll għal jekk
jew le ried li jkun kaptan, liema

1035
00:48:27,780 --> 00:48:30,400
sess tagħhom kien, u
dak dorm tagħhom kien.

1036
00:48:30,400 --> 00:48:33,370
U mbagħad I hard kodifikati fl-affarijiet
bħal Apley Qorti, u Canaday,

1037
00:48:33,370 --> 00:48:34,880
Grays, u oħrajn.

1038
00:48:34,880 --> 00:48:36,300
>> Għalhekk għal darb'oħra, tags ġodda.

1039
00:48:36,300 --> 00:48:39,820
Ma bbenefikawx dawn qabel, ġodda
attributi, iżda pjuttost aċċessibbli.

1040
00:48:39,820 --> 00:48:42,360
Ladarba inti tara eżempju, inti tista 'tip
ta tissellef dik l-idea u jagħmlu qatra

1041
00:48:42,360 --> 00:48:43,820
down menu għal xejn aktar.

1042
00:48:43,820 --> 00:48:46,350
Imma x'hemm importanti huwa li kull wieħed
dawn l-affarijiet għandhom ismijiet.

1043
00:48:46,350 --> 00:48:49,720
U fil-qiegħ ta 'din il-formola, hemm
buttuna issottometti li tikketta,

1044
00:48:49,720 --> 00:48:51,510
jew il-valur, huwa reġistru.

1045
00:48:51,510 --> 00:48:52,670
>> Mela ejja mur din il-paġna.

1046
00:48:52,670 --> 00:48:55,050
Let me jmorru lura fil-
elenkar tad-direttorju.

1047
00:48:55,050 --> 00:48:59,410
Let me go fis froshims,
u mur froshim0.php.

1048
00:48:59,410 --> 00:49:01,150
Allura huwa hideous, li tkun ġusta.

1049
00:49:01,150 --> 00:49:03,950
So I jistgħu definittivament stylize dan
ma 'xi CSS, I tista' tagħmel xi

1050
00:49:03,950 --> 00:49:06,890
grafika, forsi żid ftit kuluri,
u tagħmel dan prettier.

1051
00:49:06,890 --> 00:49:10,530
Imma funzjonalment, I d jargumentaw li dan
huwa attwalment pretty kompluta.

1052
00:49:10,530 --> 00:49:15,190
>> Sfortunatament, meta I timla dan out,
David, Kaptan, Male, aħna ser jagħżlu,

1053
00:49:15,190 --> 00:49:20,510
ejja ngħidu Matthews, reġistru,
dak kollu li jiġri huwa dan.

1054
00:49:20,510 --> 00:49:21,910
Iżda tinnota ftit takeaways.

1055
00:49:21,910 --> 00:49:27,130
Waħda, liema fajl lura dawk
riżultati, apparentement?

1056
00:49:27,130 --> 00:49:29,470
Għalhekk huwa, tabilħaqq, register0.php.

1057
00:49:29,470 --> 00:49:34,570
Allura l-fatt li rajna din l-azzjoni
valur mument ilu għal register0, dan

1058
00:49:34,570 --> 00:49:37,500
jikkorrobora li aħna tassew ntemmet
up fuq dan il-fajl partikolari.

1059
00:49:37,500 --> 00:49:39,040
>> Issa dan huwa biss test ikrah.

1060
00:49:39,040 --> 00:49:42,810
Iżda avviż li dan it-test huwa
ġejjin minn ospitanti lokali,

1061
00:49:42,810 --> 00:49:44,170
li hija mill-appliance.

1062
00:49:44,170 --> 00:49:46,350
Aħsbu fil-appliance issa biss bħala
a web server li jista 'jkun fil-

1063
00:49:46,350 --> 00:49:46,910
Science Center.

1064
00:49:46,910 --> 00:49:48,060
Dan jista 'jkun fuq il-web attwali.

1065
00:49:48,060 --> 00:49:49,850
Allura huwa aċċessibbli għall-pubbliku.

1066
00:49:49,850 --> 00:49:55,480
>> Allura ċar, hemm xi mod li tgħaddi
jiffurmaw inputs qasam għal server

1067
00:49:55,480 --> 00:49:56,840
sabiex ikun jista 'jagħmel xi ħaġa magħhom.

1068
00:49:56,840 --> 00:49:59,020
Sfortunatament, register0
huwa pretty stupid.

1069
00:49:59,020 --> 00:50:01,870
Kull ma huwa jistampa firxa
li tidher bħal dan.

1070
00:50:01,870 --> 00:50:04,790
U m'humiex firxa fil-
sens li nafuh.

1071
00:50:04,790 --> 00:50:08,760
Jirriżulta li PHP, u ħafna ta '
lingwi, mhux biss numerikament

1072
00:50:08,760 --> 00:50:12,350
arrays indiċjati li għandhom indiċi ewwel hija
żero, allura wieħed, allura żewġ, imbagħad dot,

1073
00:50:12,350 --> 00:50:13,780
dot, dot, n minus 1.

1074
00:50:13,780 --> 00:50:16,400
>> Dan huwa dak li jissejjaħ
firxa assoċjattiva.

1075
00:50:16,400 --> 00:50:21,150
Firxa assoċjattiva huwa wieħed fejn
inti jista 'jaħżen valur pari ewlenin fejn

1076
00:50:21,150 --> 00:50:23,160
il-muftieħ huwa mhux neċessarjament numru.

1077
00:50:23,160 --> 00:50:25,580
Dan fil-fatt jista 'jkun string, kelma.

1078
00:50:25,580 --> 00:50:28,230
U hekk dan jista 'jiġi implimentat,
taħt il-barnuża, jirriżulta,

1079
00:50:28,230 --> 00:50:31,896
permezz ta 'struttura data magħrufa bħala?

1080
00:50:31,896 --> 00:50:33,600
Ħsieb xi ħaġa drammatiku
kien wasal biex jiġri -

1081
00:50:33,600 --> 00:50:34,840
tabella hash.

1082
00:50:34,840 --> 00:50:38,955
>> Allura tabella hash, irtirar, dawk tal inti
li ma kien għal P sett 6, jew saħansitra lura

1083
00:50:38,955 --> 00:50:44,110
dan, mill-inqas anki jekk inti ma jipprova, a
tabella hash, fl-użu tagħna, intuża biex

1084
00:50:44,110 --> 00:50:45,090
biss taħżen kliem.

1085
00:50:45,090 --> 00:50:47,980
Imma verament, inti kienu ħażna
ċwievet u valuri.

1086
00:50:47,980 --> 00:50:51,940
Jekk inti implimenta tabella hash għal P
stabbiliti dizzjunarju 6, il-ċwievet kienu l-

1087
00:50:51,940 --> 00:50:56,890
kliem stess, u l-valuri
kienu vera jew falza b'mod effettiv.

1088
00:50:56,890 --> 00:51:00,190
Iva, hawn, jew impliċitament,
ebda, mhux hawn.

1089
00:51:00,190 --> 00:51:02,140
>> Well, nistgħu tiġġeneralizza dik l-idea.

1090
00:51:02,140 --> 00:51:06,230
U aħna jistgħu jużaw data simili ħafna
istruttura biex jaħżnu mhux l-sekwenza

1091
00:51:06,230 --> 00:51:10,180
ruħha waħidha fit-tabella hash tiegħek, iżda
jissoponi li f'kull wieħed mill hash tiegħek

1092
00:51:10,180 --> 00:51:11,130
lymph mejda tal.

1093
00:51:11,130 --> 00:51:14,210
U inti tista 'anki tagħmel dan jipprova
aktar milli biss ikollhom bool.

1094
00:51:14,210 --> 00:51:15,350
Jista 'jkollok xi ħaġa oħra.

1095
00:51:15,350 --> 00:51:19,590
X'jiġri jekk iċ-ċavetta ma kienx Maxwell, għal
Pereżempju, imma kwotazzjoni unquote "isem," jew

1096
00:51:19,590 --> 00:51:22,900
nikkwota unquote "kaptan." U ġewwa ta '
istruttura tiegħek data C, inti tpoġġi

1097
00:51:22,900 --> 00:51:26,170
valur, mhux biss Boolean, iżda ta 'valur
kwotazzjoni simili unquote "David," jew

1098
00:51:26,170 --> 00:51:28,690
"M," jew "Matthews," u oħrajn.

1099
00:51:28,690 --> 00:51:33,170
>> Allura dawk l-istrutturi tad-data istess aħna użati
apparentement jeżistu f'lingwi oħra.

1100
00:51:33,170 --> 00:51:37,650
U I d jargumentaw li qed attwalment ħafna,
ferm aktar sempliċi għall-aċċess hawn.

1101
00:51:37,650 --> 00:51:40,300
Ejja fil-fatt tagħti ħarsa
issa f'xi sintassi bħal dan.

1102
00:51:40,300 --> 00:51:43,120
>> Jien ser tmur ġo direttorju PHP.

1103
00:51:43,120 --> 00:51:48,390
U jien ser tiftaħ aħjar
verżjoni tal bonjour-0 minn qabel.

1104
00:51:48,390 --> 00:51:50,270
Avviż li kollha I ma kien
żid xi kummenti.

1105
00:51:50,270 --> 00:51:52,530
Allura nistgħu teħles minn dik distrazzjoni.

1106
00:51:52,530 --> 00:51:57,610
>> U dan il-programm tabilħaqq prints
bonjour għaliex stajt speċifikati bejn

1107
00:51:57,610 --> 00:52:01,420
tags li nixtieq li teżegwixxi dan il-kodiċi.

1108
00:52:01,420 --> 00:52:03,380
Issa, aħna ser tara fil-mument
għaliex dan ikun utli.

1109
00:52:03,380 --> 00:52:05,630
Imma ejja tiftaħ eżempju wieħed ieħor hawn.

1110
00:52:05,630 --> 00:52:10,430
Let me imorru quddiem u tiftaħ jgħidu,
gedit ta 'kondizzjonijiet waħda.

1111
00:52:10,430 --> 00:52:12,970
>> Dan huwa mod lura fil-ħin issa.

1112
00:52:12,970 --> 00:52:16,320
Iżda ġimgħat ilu, I think, fil-ġimgħa waħda jew
ġimgħatejn, kellna eżempju imsejħa

1113
00:52:16,320 --> 00:52:18,470
conditions1.c.

1114
00:52:18,470 --> 00:52:22,050
U I iddeċieda li reimplement fil PHP,
biss it-tip ta 'jenfasizza li

1115
00:52:22,050 --> 00:52:26,500
PHP, sintattikament, huwa kważi identiku
li C. Din mhix qabża kbira

1116
00:52:26,500 --> 00:52:27,840
minn ġimgħa li għaddiet biex dan.

1117
00:52:27,840 --> 00:52:31,230
>> Avviż fil-quċċata ta 'dan il-programm, li
jibda, bħal qabel, b'xi

1118
00:52:31,230 --> 00:52:34,260
kummenti, li jien ser jeħles
ta bħala distrazzjoni.

1119
00:52:34,260 --> 00:52:37,410
Avviż li jien fil-PHP
mod li dan il-fajl.

1120
00:52:37,410 --> 00:52:40,160
Allura dan il-kodiċi, Ser naraw,
se tikseb esegwiti.

1121
00:52:40,160 --> 00:52:42,670
Avviż li hemm readline,
li probabbilment hija l-

1122
00:52:42,670 --> 00:52:46,230
Analog PHP ta getstring.

1123
00:52:46,230 --> 00:52:47,390
Avviż huwa ftit differenti.

1124
00:52:47,390 --> 00:52:51,410
Inti fil-fatt tispeċifika pront lill-
funzjoni msejħa linja jinqraw, u li l-

1125
00:52:51,410 --> 00:52:52,180
dak l-utent jara.

1126
00:52:52,180 --> 00:52:53,520
Allura inti ma għandekx printf manwalment.

1127
00:52:53,520 --> 00:52:54,860
Iżda li mhux big deal.

1128
00:52:54,860 --> 00:52:59,150
Jien ser taħżen, ġewwa ta '$ n, il-
ritorn valur ta 'dan, sabiex ikun x'ikun il-

1129
00:52:59,150 --> 00:53:00,490
tipi utent fil huwa int tagħhom.

1130
00:53:00,490 --> 00:53:01,660
U hawnhekk kurżità ieħor.

1131
00:53:01,660 --> 00:53:05,810
Jirriżulta, fil-PHP, kwalunkwe varjabbli
biss għandha jkollha prefissi

1132
00:53:05,810 --> 00:53:06,970
b'sinjal dollaru.

1133
00:53:06,970 --> 00:53:08,110
Huwa ftit annoying.

1134
00:53:08,110 --> 00:53:10,870
Imma avviż dak I ma jkunux għamlu fil-PHP.

1135
00:53:10,870 --> 00:53:13,980
X'hemm nieqes mill-naħa tax-xellug
naħa tal-ugwali sinjal?

1136
00:53:13,980 --> 00:53:15,430
>> Ma ssemmiet l-tip.

1137
00:53:15,430 --> 00:53:19,400
Allura dan huwa differenti minn C. Għal aħjar
jew għall-agħar, PHP huwa laxk

1138
00:53:19,400 --> 00:53:20,550
lingwa ittajpjat.

1139
00:53:20,550 --> 00:53:22,010
Huwa ma jkollu numri.

1140
00:53:22,010 --> 00:53:23,240
Huwa ma jkollu kordi.

1141
00:53:23,240 --> 00:53:24,015
Huwa ma jkollu Booleans.

1142
00:53:24,015 --> 00:53:26,220
U dan ma jkollu ftit
tipi ta 'data oħra.

1143
00:53:26,220 --> 00:53:30,570
Imma inti, l-programmer, normalment
ma jkollhom jimpurtahom minnhom.

1144
00:53:30,570 --> 00:53:34,010
Il-rasu ta 'dan huwa li jagħmel
hija ftit aktar faċli għall-programm.

1145
00:53:34,010 --> 00:53:35,380
Inti tista 'taħseb ftit inqas.

1146
00:53:35,380 --> 00:53:39,840
Il-tnaqqis huwa li tiftaħ ukoll inti sa
bugs potenzjali jekk inti aċċidentalment

1147
00:53:39,840 --> 00:53:43,080
jittrattaw numru bħala string, a string
bħala numru, potenzjalment, iżda anke

1148
00:53:43,080 --> 00:53:46,150
allura, PHP, u ħafna ta 'lingwi,
huma pjuttost tolleranti.

1149
00:53:46,150 --> 00:53:49,050
Huma se jużaw dak li sejjaħ
casting impliċita.

1150
00:53:49,050 --> 00:53:55,220
U jekk inti tipprova tuża n fil-kuntest
ta 'sitwazzjoni numerika, se

1151
00:53:55,220 --> 00:53:58,040
jikkonvertu dak hawn se tkun
spag, għaliex jekk it-tipi tal-utent

1152
00:53:58,040 --> 00:54:01,570
xi ħaġa, u inti tikseb ir-riżultat,
kif ma readline, jew tikseb string,

1153
00:54:01,570 --> 00:54:02,910
li għaddej biex jirritorna string.

1154
00:54:02,910 --> 00:54:07,360
>> Iżda l-avviż, linji koppja aktar tard, I
jiċċekkjaw jekk n hija akbar minn żero.

1155
00:54:07,360 --> 00:54:13,370
Allura PHP se impliċitament jitfa tiegħi
"String" 123, jew kull utent

1156
00:54:13,370 --> 00:54:14,860
tipi fil, fi int.

1157
00:54:14,860 --> 00:54:18,730
Għalhekk fil-qosor, Jittieħed biss xogħlijiet
ħafna aktar intuwittivament.

1158
00:54:18,730 --> 00:54:23,410
Allura aħna issa jibdew jirrilassaw ftit tal-
affarijiet li aħna ghamilt fil-passat.

1159
00:54:23,410 --> 00:54:24,780
>> A lott ta 'dan il-għalf huwa
l-istess, għalkemm.

1160
00:54:24,780 --> 00:54:26,340
Għadhom ugwali ugwali.

1161
00:54:26,340 --> 00:54:30,350
Bħala twarrib PHP wkoll ugwali ugwali
ugwali, iżda aktar fuq li, forsi, fil

1162
00:54:30,350 --> 00:54:30,850
il-futur.

1163
00:54:30,850 --> 00:54:31,150
Dan kien.

1164
00:54:31,150 --> 00:54:35,660
Typo iżda tnejn ugwali sinjali tfisser l-istess
Ħaġa bħal qabel, għall-paragun.

1165
00:54:35,660 --> 00:54:37,060
printf tfisser l-istess ħaġa bħal qabel.

1166
00:54:37,060 --> 00:54:39,160
Backslash n tfisser l-istess
Ħaġa bħal qabel.

1167
00:54:39,160 --> 00:54:40,390
>> Allura kif nista run dan il-programm?

1168
00:54:40,390 --> 00:54:44,400
Ukoll, bħal qabel, jekk I do PHP,
conditions1.php, u tip

1169
00:54:44,400 --> 00:54:46,560
numru bħall 123.

1170
00:54:46,560 --> 00:54:47,720
C'est numru pożittiv.

1171
00:54:47,720 --> 00:54:49,510
Jekk I tip 0, I pick 0.

1172
00:54:49,510 --> 00:54:53,700
U jekk I tip 123 negattiv, I nikseb
back numru negattiv, li huwa biss

1173
00:54:53,700 --> 00:54:59,050
jiġifieri, sintattikament, PHP
huwa super, super simili.

1174
00:54:59,050 --> 00:55:03,250
>> Allura għaliex huwa dan issa utli
f'kuntest web?

1175
00:55:03,250 --> 00:55:06,710
Well, ejja mmorru lura għal dan froshims
eżempju, li ħares,

1176
00:55:06,710 --> 00:55:08,600
għal darb'oħra, bħal dan hawn.

1177
00:55:08,600 --> 00:55:11,580
U ejja attwalment pull up il-paġna web
għal darb'oħra, li dehru qishom dan.

1178
00:55:11,580 --> 00:55:14,930
X'nistgħu nagħmlu mal-
data thats sottomessa?

1179
00:55:14,930 --> 00:55:18,770
>> Well, let me jiftħu aktar ġodda
verżjoni ta 'dan.

1180
00:55:18,770 --> 00:55:20,920
U tkun taf tara li l-problema
ispeċifikazzjoni settijiet mixjiet inti

1181
00:55:20,920 --> 00:55:22,850
permezz ta 'ftit ta' dawn.

1182
00:55:22,850 --> 00:55:29,610
Pjuttost milli tibda bil żero,
ejja nħarsu lejn froshims3,

1183
00:55:29,610 --> 00:55:31,410
li ma daqsxejn aktar.

1184
00:55:31,410 --> 00:55:34,780
>> Avviż ewwel, fil-fatt, ejja tiftaħ
up dak 0 kien, sabiex inti tara

1185
00:55:34,780 --> 00:55:37,170
dak ir-reġistru 0 kien.

1186
00:55:37,170 --> 00:55:40,040
Avviż dak reġistru 0 għamlet.

1187
00:55:40,040 --> 00:55:41,730
Waħda, għandi l-kummenti fil-quċċata.

1188
00:55:41,730 --> 00:55:43,900
Ħassar dawk u tiffoka biss fuq dan.

1189
00:55:43,900 --> 00:55:48,730
Ħafna mill-kontenut ta 'register0.php
huma, ovvjament, liema lingwa?

1190
00:55:48,730 --> 00:55:49,980
Just PHP prima.

1191
00:55:49,980 --> 00:55:53,430
>> Allura avviż, dan il-fajl ma tibda
ma ', fil-mument, parentesi miftuħa,

1192
00:55:53,430 --> 00:55:54,970
kwistjoni mark, PHP.

1193
00:55:54,970 --> 00:55:59,800
PHP ma jippermetti li inti intermingle
Kodiċi PHP ma HTML tags.

1194
00:55:59,800 --> 00:56:04,130
Imma jien ghamilt li hawn ġewwa
tal-paġna hawn fuq.

1195
00:56:04,130 --> 00:56:08,180
>> Issa, għal darb'oħra, youd taf biss dan mill-
li ħarist lejn l-manwal. print_r,

1196
00:56:08,180 --> 00:56:13,410
jirriżulta, huwa print_recursive.
_recursive U dan huwa biss handy

1197
00:56:13,410 --> 00:56:16,780
funzjoni utilità li biss tistampa,
recursively, tkun xi tkun inti jagħtih.

1198
00:56:16,780 --> 00:56:18,760
Jekk inti jagħtih firxa,
dan ser jistampaw firxa.

1199
00:56:18,760 --> 00:56:20,180
Jekk inti jagħtih numru,
dan ser jistampa numru.

1200
00:56:20,180 --> 00:56:21,570
Jagħtih string, dan ser
stampar ta 'sekwenza.

1201
00:56:21,570 --> 00:56:24,500
Jekk inti jagħtih tabella hash, huwa
se jistampa tabella hash.

1202
00:56:24,500 --> 00:56:26,730
Inti ma jkollhom jiktbu kollha
tal-imsemmi kodiċi yourself.

1203
00:56:26,730 --> 00:56:29,490
>> Issa avviż li jien jidħlu
PHP modalità hawn fuq.

1204
00:56:29,490 --> 00:56:32,070
Jien joħorġu mod PHP hawn fuq.

1205
00:56:32,070 --> 00:56:35,950
Allura meta l-web server taqra dan il-fajl
fuq għal isfel, xellug għal-lemin, minħabba li

1206
00:56:35,950 --> 00:56:40,750
dan jispiċċa fi file imsejħa. PHP,
x'ikun mhux ġewwa tal tags PHP huwa

1207
00:56:40,750 --> 00:56:42,820
biss se tkun bżiq
out, bħal HTML prima.

1208
00:56:42,820 --> 00:56:43,630
No big deal.

1209
00:56:43,630 --> 00:56:49,280
Iżda hekk kif l-avviżi tal-web server
dan, li għaddej biex ngħid, I m'għandhomx

1210
00:56:49,280 --> 00:56:51,850
bżiq, litteralment, print_r tal-posta.

1211
00:56:51,850 --> 00:56:54,910
I għandu jesegwixxi li ġej
linja tal-kodiċi.

1212
00:56:54,910 --> 00:56:59,850
>> Allura l-aħħar mistoqsija, allura, dan il-fajl
huwa, ukoll, dak l-Heck huwa dan?

1213
00:56:59,850 --> 00:57:00,530
Ħu raden.

1214
00:57:00,530 --> 00:57:04,230
X'inhu $ _POST, probabbilment?

1215
00:57:04,230 --> 00:57:07,070
>> UDJENZA: [inaudible]

1216
00:57:07,070 --> 00:57:08,830
>> SPEAKER 1: Yeah, id-data stazzjonati.

1217
00:57:08,830 --> 00:57:11,350
Recall, ejja iscroll lura fl
żmien għal ftit mument.

1218
00:57:11,350 --> 00:57:13,165
froshim0, għal darb'oħra, dehru qishom dan.

1219
00:57:13,165 --> 00:57:15,640
Maġġoranza super ta 'dan huwa biss HTML.

1220
00:57:15,640 --> 00:57:18,410
Għal darb'oħra, xi tags int ma
tidher għadhom, jew li magħhom

1221
00:57:18,410 --> 00:57:19,360
inti diġà huma familjari.

1222
00:57:19,360 --> 00:57:21,990
Imma l-ħaġa interessanti kien dan.

1223
00:57:21,990 --> 00:57:27,270
Din il-linja waħda huwa dak li verament jgħaqqad
huwa għall-fajl register0.php tagħna.

1224
00:57:27,270 --> 00:57:29,200
Jien sottomissjoni permezz metodu post.

1225
00:57:29,200 --> 00:57:33,130
U dan ifisser li l-parametri
it-tipi utent fil m'humiex

1226
00:57:33,130 --> 00:57:35,150
ser jispiċċaw fejn.

1227
00:57:35,150 --> 00:57:36,175
>> Huma qed mhux se
juru up fil-URL.

1228
00:57:36,175 --> 00:57:39,020
Huma għadhom għaddejjin li jintbagħtu mill-
klijent, mill-browser, għall-

1229
00:57:39,020 --> 00:57:42,080
server, iżda biss permezz xi oħra
mekkaniżmu li aħna ser jirrinunzjaw idejn tagħna

1230
00:57:42,080 --> 00:57:44,330
fil għal-lum, iżda mhux fil-URL.

1231
00:57:44,330 --> 00:57:47,630
Iżda avviż-relazzjoni issa ma
post, li, b'konvenzjoni, hu

1232
00:57:47,630 --> 00:57:49,160
zghar hawn.

1233
00:57:49,160 --> 00:57:54,090
>> Imma jekk I jiftħu register0.php,
Jien apparentement istampar dan.

1234
00:57:54,090 --> 00:57:56,450
Allura dan huwa tip ta 'stramb
tismija konvenzjoni.

1235
00:57:56,450 --> 00:58:01,430
Imma x'hemm sbieħ fil-PHP huwa li meta
użu PHP f'kuntest web, mhux fuq

1236
00:58:01,430 --> 00:58:04,480
kmand linja bħal I ma mument ilu,
meta int fil-fatt tużaha fil-web

1237
00:58:04,480 --> 00:58:10,580
paġna, f'direttorju Vhost kif aħna,
awtomatikament se jimlew din PHP

1238
00:58:10,580 --> 00:58:15,560
ħaġa, li hija firxa assoċjattiva,
biex ngħidu hekk, tabella hash, ma

1239
00:58:15,560 --> 00:58:17,290
kollox l-utent ittajpjat pulzieri

1240
00:58:17,290 --> 00:58:22,000
>> Fil-qosor, $ _POST fil-limiti kollha hija
varjabbli globali li PHP biss

1241
00:58:22,000 --> 00:58:25,050
magically joħloq għalik meta
użu PHP f'kuntest web.

1242
00:58:25,050 --> 00:58:29,160
U li tqiegħed ġewwa ta 'dan kollu ta' l-
ismijiet ta 'parametri fil-forma li

1243
00:58:29,160 --> 00:58:33,200
ġie ppreżentat lill dan il-fajl u kollha ta '
il-valuri li l-utent ittajpjat pulzieri

1244
00:58:33,200 --> 00:58:37,790
Għalhekk idejn lilek dak l-utent
ttajpjata għal dik il-forma.

1245
00:58:37,790 --> 00:58:42,210
>> Għalhekk qabel, sirna output verament stupid
ta 'ftit jaraw dan minħabba I kollha ma

1246
00:58:42,210 --> 00:58:44,400
kienet recursively ipprintja din array.

1247
00:58:44,400 --> 00:58:46,060
Il-muftieħ huwa l-isem, il-valur huwa David.

1248
00:58:46,060 --> 00:58:46,980
Il-muftieħ huwa Kaptan.

1249
00:58:46,980 --> 00:58:47,970
Il-valur huwa fuq.

1250
00:58:47,970 --> 00:58:52,300
U l-vleġġa doppja u l-angolu
bracket hemm, dan huwa biss arbitrarju.

1251
00:58:52,300 --> 00:58:53,270
Dan huwa mhux il-kodiċi.

1252
00:58:53,270 --> 00:58:57,690
Dan huwa biss mod PHP ta 'turi li inti
dak il-valur ta 'xi muftieħ huwa.

1253
00:58:57,690 --> 00:59:03,000
>> Imma issa let me tipproponi li fl-
froshIMs3, huwa kważi identiku

1254
00:59:03,000 --> 00:59:04,950
ħlief hija tqis li dan il-fajl.

1255
00:59:04,950 --> 00:59:08,570
U għal darb'oħra, aħna qed tmur biex tip ta 'ftit
t'għajn fil dan, biss biex tara xi

1256
00:59:08,570 --> 00:59:12,040
sintassi, imma avviż liema
dan il-fajl ma.

1257
00:59:12,040 --> 00:59:14,930
Ħu raden biss ibbażat fuq il-linji ta '
kodiċi, li probabbilment huma look like

1258
00:59:14,930 --> 00:59:17,410
Grieg, sa ċertu punt,
huwa apparentement tagħmel.

1259
00:59:17,410 --> 00:59:20,580

1260
00:59:20,580 --> 00:59:23,110
>> Dan il-fajl huwa b'xi mod relatati
għall-posta, email.

1261
00:59:23,110 --> 00:59:24,770
Allura dak li huwa dan il-programm tagħmel?

1262
00:59:24,770 --> 00:59:28,740
F'dan il-verżjoni, jekk kienu I li attwalment
jimlew din il-formola - u let me go għal

1263
00:59:28,740 --> 00:59:30,760
froshIMs3, mhux froshIMs0 -

1264
00:59:30,760 --> 00:59:33,280

1265
00:59:33,280 --> 00:59:34,540
il-forma jistenna l-istess.

1266
00:59:34,540 --> 00:59:37,980
David, kaptan, raġel, dorm, Matthews.

1267
00:59:37,980 --> 00:59:42,980
Imma jekk I tissottometti dan, dan il-fajl huwa
se jmorru għall register3.php.

1268
00:59:42,980 --> 00:59:46,330
>> U nitlob, billi tħares lejn huwa
kodiċi tas-sors, li għaddej biex

1269
00:59:46,330 --> 00:59:47,650
b'xi jinvolvu email.

1270
00:59:47,650 --> 00:59:49,620
Let me imorru quddiem u tiftaħ dan
up fil-tieqa akbar, hekk aħna

1271
00:59:49,620 --> 00:59:51,030
tista 'tara aktar nadif.

1272
00:59:51,030 --> 00:59:57,220
Aħna fil Vhosts, ospitanti lokali,
pubbliku, froshims.

1273
00:59:57,220 --> 00:59:58,680
Jien ser tiftaħ differenti
programm, biss hekk aħna

1274
00:59:58,680 --> 01:00:00,160
tista 'tara aktar f'daqqa.

1275
01:00:00,160 --> 01:00:03,100
>> Allura issa hawn, avviż ftit affarijiet.

1276
01:00:03,100 --> 01:00:06,530
Fil-quċċata tal-fajl huwa miftuħ
parentesi, kwistjoni mark, PHP.

1277
01:00:06,530 --> 01:00:08,920
Imbagħad hemm mazz ta 'kummenti,
li nistgħu ninjoraw, huwa

1278
01:00:08,920 --> 01:00:10,450
uninteresting għal issa.

1279
01:00:10,450 --> 01:00:11,300
>> Issa hemm dan.

1280
01:00:11,300 --> 01:00:14,200
Jirriżulta PHP għandha ħafna
tal-kodiċi imsejħa jeħtieġu.

1281
01:00:14,200 --> 01:00:19,110
Dan huwa simili ħafna fl-ispirtu li l-C
jinkludu, hash jinkludu, li

1282
01:00:19,110 --> 01:00:21,980
essenzjalment grabs l-kontenuti ta 'ċerti
fajl ieħor u biss plops lilhom hawnhekk,

1283
01:00:21,980 --> 01:00:22,930
sabiex inti tista 'tużahom.

1284
01:00:22,930 --> 01:00:27,060
F'dan il-każ, l-appliance għandha,
installat minn qabel, librerija, ħielsa u

1285
01:00:27,060 --> 01:00:29,900
open librerija sors imsejjaħ PHP
mailer li kulħadd jista '

1286
01:00:29,900 --> 01:00:30,770
tniżżel mill-internet.

1287
01:00:30,770 --> 01:00:32,000
Aħna biss għamlu dan għalik.

1288
01:00:32,000 --> 01:00:36,130
U dan ifisser I issa għandhom email
funzjonalità għad-dispożizzjoni tiegħi.

1289
01:00:36,130 --> 01:00:38,170
>> Issa, avviż ftit affarijiet.

1290
01:00:38,170 --> 01:00:41,120
Jien ser jivvalida l-
sottomissjoni forma ta.

1291
01:00:41,120 --> 01:00:45,980
Jirriżulta PHP, wieħed, għandha exclamation
punti għall-mhux-operatur, bħad

1292
01:00:45,980 --> 01:00:49,810
C. Iżda PHP wkoll funzjoni
imsejħa vojta.

1293
01:00:49,810 --> 01:00:53,920
>> Empty jirritorna veru jekk il-valur
tal-ħaġa inti jagħtih fl

1294
01:00:53,920 --> 01:00:57,190
parentesi hija vojta, bħall-
l-utent ma tip xejn pulzieri

1295
01:00:57,190 --> 01:01:02,680
Allura dan huwa qal, u avviż-
sintassi, ħafna reminixxenti ta 'C, jekk il-

1296
01:01:02,680 --> 01:01:07,730
isem ewlieni, sabiex il-kamp isem fil-forma,
li ġiet ippreżentata bil-posta, minn

1297
01:01:07,730 --> 01:01:13,010
l-utent, mhuwiex li vojta, u d-
sessi mhux vojta fil-forma kif

1298
01:01:13,010 --> 01:01:15,980
ukoll, u dorm tagħhom ma tkunx vojta -

1299
01:01:15,980 --> 01:01:19,980
imma avviż I ma jimpurtahom dwar Kaptan,
allura dak li aħna se jagħmlu?

1300
01:01:19,980 --> 01:01:21,990
>> Jien ser tesegwixxi
din il-linja tal-kodiċi.

1301
01:01:21,990 --> 01:01:24,100
U inti tista 'taħseb dan it-tip ta'
bħal malloc, iżda huwa ftit

1302
01:01:24,100 --> 01:01:24,800
fancier minn dak.

1303
01:01:24,800 --> 01:01:29,200
Iżda għal issa dan jagħti me a speċjali
Struct tat-tip PHP mailer.

1304
01:01:29,200 --> 01:01:31,410
Iżda jinjora l-keyword ġodda għal-lum.

1305
01:01:31,410 --> 01:01:35,670
>> Issa jien ser sejħa funzjoni msejħa
IsSMTP, li jgħid, l-użu SMTP.

1306
01:01:35,670 --> 01:01:39,380
Dan huwa port 25, bħad-video
aħħar ġimgħa, meta l-ħaġa kienet jitfg

1307
01:01:39,380 --> 01:01:40,710
emails fil-firewall.

1308
01:01:40,710 --> 01:01:42,440
Port 25 huwa SMTP.

1309
01:01:42,440 --> 01:01:44,410
SMTP ifisser tuża l-server tal-posta.

1310
01:01:44,410 --> 01:01:46,215
Liema wieħed, nistgħu nużaw l-Harvard
SMTP.fas.harvard.edu.

1311
01:01:46,215 --> 01:01:48,850

1312
01:01:48,850 --> 01:01:51,590
>> Aħna tista 'tistabbilixxi l-indirizz minn
li jkun John Harvard.

1313
01:01:51,590 --> 01:01:55,090
Jekk I iscroll aktar, I tista 'tistabbilixxi
l-indirizz tal-benefiëjarju, biss

1314
01:01:55,090 --> 01:01:56,840
arbitrarju, li jkun John
Harvard kif ukoll.

1315
01:01:56,840 --> 01:01:59,210
Hekk hu għaddej biex jiġu email innifsu.

1316
01:01:59,210 --> 01:02:01,600
>> Now I tista 'tistabbilixxi is-suġġett
li jkun reġistrazzjoni.

1317
01:02:01,600 --> 01:02:03,700
U I tista 'tistabbilixxi l-korp
ta 'email kif ġej.

1318
01:02:03,700 --> 01:02:06,500
Din il-linja jistenna ftit aktar cryptic,
iżda li biss għaliex hemm ħafna

1319
01:02:06,500 --> 01:02:07,450
ta 'informazzjoni fiha.

1320
01:02:07,450 --> 01:02:10,670
Waħda, hemm operatur dot.

1321
01:02:10,670 --> 01:02:14,510
Xi ħadd għandhom ikunu jafu liema diġà
l-operatur dot ma.

1322
01:02:14,510 --> 01:02:15,436
Huwa konkatenazzjoni.

1323
01:02:15,436 --> 01:02:19,240
Mela jekk inti tixtieq li tieħu string fil-PHP,
u tehmeż, jew prepend dan, li

1324
01:02:19,240 --> 01:02:23,500
string ieħor fil-PHP, nirringrazzjaw 'l Alla inti
ma jkollhom jużaw strcopy u malloc,

1325
01:02:23,500 --> 01:02:25,490
u kollha ta 'dan aktar.

1326
01:02:25,490 --> 01:02:28,765
>> Jekk inti tixtieq li concatenate żewġ kordi,
quién dwar il-memorja.

1327
01:02:28,765 --> 01:02:30,850
Ħalli figura PHP li out għalik.

1328
01:02:30,850 --> 01:02:35,200
What PHP se tagħmel mal-operatur dot
hawnhekk huwa biss tagħmel sentenza big out

1329
01:02:35,200 --> 01:02:37,900
ta 'din il-linja, il-linja,
din il-linja, il-linja.

1330
01:02:37,900 --> 01:02:40,460
U issa l-avviż, li għaddej
ikunu fejn jitwaħħal fil-valuri.

1331
01:02:40,460 --> 01:02:43,680
Allura l-email li John Harvard għaddej
li jirċievu hija litteralment se ngħid

1332
01:02:43,680 --> 01:02:49,450
isem, kolon, xi ħaġa, pjuttost, allura aħna
tagħlaq il-spag u concatenate fuq

1333
01:02:49,450 --> 01:02:52,220
ikun x'ikun l-utent ittajpjat
fi, imbagħad linja ġdida.

1334
01:02:52,220 --> 01:02:54,570
>> Imbagħad, fuq il-linja li jmiss ta 'John Harvard
email, li għaddej biex ngħid

1335
01:02:54,570 --> 01:02:55,910
Kaptan, Fuq jew Xejn.

1336
01:02:55,910 --> 01:02:57,810
Huwa ser ngħid sess,
maskili jew femminili.

1337
01:02:57,810 --> 01:02:59,680
Dorm se tkun Matthews
fil-każ tiegħi.

1338
01:02:59,680 --> 01:03:03,400
U mbagħad avviż semicolon familjari
fl-aħħar nett.

1339
01:03:03,400 --> 01:03:07,830
U mbagħad, stabbiliti hawn, avviż, kemmxejn
cryptic xorta, iżda għal darb'oħra, wara

1340
01:03:07,830 --> 01:03:12,730
mudell li se jsiru aktar familjari
wara P stabbiliti 7, jekk jibgħat il-posta

1341
01:03:12,730 --> 01:03:16,610
prospetti falz, imbagħad imorru quddiem u jmutu.

1342
01:03:16,610 --> 01:03:19,610
>> Allura PHP għandha funzjoni msejħa die,
li, litteralment, biss joqtol il-

1343
01:03:19,610 --> 01:03:22,830
website u biss tistampa kwalunkwe
inti tgħid - tagħha hija tmut

1344
01:03:22,830 --> 01:03:24,280
kliem, biex ngħidu hekk.

1345
01:03:24,280 --> 01:03:28,310
U li, fil-każ, se print
barra dak l-info żball hija għal

1346
01:03:28,310 --> 01:03:29,860
x'ikun ġara li jmorru ħażin.

1347
01:03:29,860 --> 01:03:34,490
Allura storja twila fil-qosor hawnhekk, dak li għandna
huwa eżempju fejn meta l-utent

1348
01:03:34,490 --> 01:03:39,150
tissottometti l-formola, froshim0,
froshims3.php, din tmur għall-

1349
01:03:39,150 --> 01:03:40,760
register3.php.

1350
01:03:40,760 --> 01:03:45,290
Iżda register3.php mbagħad tipproċedi
biex tesegwixxi kollha ta 'dawn il-linji.

1351
01:03:45,290 --> 01:03:46,620
>> Allura hemm xi aways 'jieħu ftit hawn.

1352
01:03:46,620 --> 01:03:50,380
Wieħed, huwa apparentement pjuttost faċli,
programmatically, li tibgħat emails,

1353
01:03:50,380 --> 01:03:50,830
li hija tajba.

1354
01:03:50,830 --> 01:03:53,500
Meta l-utenti jirreġistraw għall-sit tiegħek, fil-
F'dan il-każ, meta huma jirreġistraw għall tiegħek

1355
01:03:53,500 --> 01:03:56,220
isport, inti tista 'email l freshman
Procter, jew John

1356
01:03:56,220 --> 01:03:57,650
Harvard, f'dan il-każ.

1357
01:03:57,650 --> 01:04:01,630
>> Iżda dan ifisser ukoll li inti tista 'tagħmel dak?

1358
01:04:01,630 --> 01:04:03,970
Jibgħat emails minn xi ħadd għal ħadd.

1359
01:04:03,970 --> 01:04:05,430
U dan huwa ħafna minnu.

1360
01:04:05,430 --> 01:04:08,580
Dan huwa mhux bħala faċilment isir jekk
int użati biex jużaw Gmail.

1361
01:04:08,580 --> 01:04:11,310
Imma jekk inti stajt qatt jintużaw Eudora jew
Outlook, inti tista pretty ħafna tgħid

1362
01:04:11,310 --> 01:04:13,720
mail server li inti
xi ħadd li tixtieq.

1363
01:04:13,720 --> 01:04:16,450
U dan huwa fejn I bżonn li jitpoġġew fuq
li hat u jgħidu, ma tagħmel dan.

1364
01:04:16,450 --> 01:04:21,140
Iżda din hija xhieda ta 'kemm huwa faċli
trid li twettaq attakki phishing, u

1365
01:04:21,140 --> 01:04:24,310
jibgħat emails anonimi, u
spam, b'mod aktar ġenerali.

1366
01:04:24,310 --> 01:04:27,330
U verament jeħodna għall-
fatt li kull ma għandek bżonn huwa xi

1367
01:04:27,330 --> 01:04:28,500
aċċess programmatiku.

1368
01:04:28,500 --> 01:04:31,940
>> Bħala twarrib, eqreb jiltaqgħu tiegħi ma
il-bord ad, proprji sena freshman tiegħi,

1369
01:04:31,940 --> 01:04:34,320
kien meta I skopriet dan berred
trick li, wow, inti tista '

1370
01:04:34,320 --> 01:04:36,850
jibgħat emails minn xi ħadd.

1371
01:04:36,850 --> 01:04:39,770
U hekk konna jkollhom xi stupid
argument, litteralment, fil-Matthews,

1372
01:04:39,770 --> 01:04:40,790
fost grupp Procter tiegħi.

1373
01:04:40,790 --> 01:04:42,470
Jien ma anki tiftakar
dak li l-kwistjoni kienet.

1374
01:04:42,470 --> 01:04:44,970
Imma jien ridt li tipprova tpoġġi l-
tmiem dan id-dibattitu stupid.

1375
01:04:44,970 --> 01:04:48,580
>> So I iddeċieda I se biss tibgħat email
għall-grupp Procter tiegħi, feint tkun

1376
01:04:48,580 --> 01:04:52,000
il-Guy-oħra, li ma 'l-opinjoni I
qablux, u jkollhom lilu qagħditx li

1377
01:04:52,000 --> 01:04:54,680
kwalunkwe opinjoni tiegħi kien
dan id-dibattitu partikolari.

1378
01:04:54,680 --> 01:04:59,320
U so I falsifikati din l-email bl-użu
teknika simili fl-ispirtu għal dan.

1379
01:04:59,320 --> 01:05:01,256
Iżda kien fil-fatt aktar faċli
fil-ħin.

1380
01:05:01,256 --> 01:05:02,435
Hit tibgħat.

1381
01:05:02,435 --> 01:05:06,660
Hu ma kienx kuntent, u lanqas ma
kienu l-bord ad.

1382
01:05:06,660 --> 01:05:10,280
>> U I kien malajr ħafna maqbuda fl
sekondi għaliex, kif tafu, I jiffirmaw

1383
01:05:10,280 --> 01:05:11,420
emails tiegħi fil b'ċertu mod.

1384
01:05:11,420 --> 01:05:14,200
U għalkemm I tagħmel dan manwalment, fil-kbar
parti, 15-il sena aktar tard minħabba I kien

1385
01:05:14,200 --> 01:05:15,080
trawmatizzati minn dak.

1386
01:05:15,080 --> 01:05:16,960
I ma jkollhomx firma
fuq email tiegħi issa.

1387
01:05:16,960 --> 01:05:20,440
Iżda fl-1995, I biss kellhom sig,
'firma email tiegħi.

1388
01:05:20,440 --> 01:05:24,630
Allura kien hemm din in-nota qal, Dear
Grupp Procter, I qagħditx opinjoni tiegħi

1389
01:05:24,630 --> 01:05:31,240
u jaqblu ma 'David, iffirmat hekk u
hekk, linja ġdida, linja ġdida, DJM.

1390
01:05:31,240 --> 01:05:36,220
>> Allura ma tagħmel dan jew, b'mod ġenerali, jieħu
vantaġġ ta 'din it-teknika.

1391
01:05:36,220 --> 01:05:39,950
Iżda meta jagħmlu websajt, bħal per
proġett finali tiegħek, meta jagħmlu

1392
01:05:39,950 --> 01:05:43,460
website għal xi ħaġa intraprenditorjali,
dan huwa kif, pragmatiku, inti tista '

1393
01:05:43,460 --> 01:05:47,000
lieva servizzi oħra fuq l-internet
bħal mail u mbagħad fil-fatt

1394
01:05:47,000 --> 01:05:49,440
tibgħat affarijiet jużaw kodiċi.

1395
01:05:49,440 --> 01:05:51,240
>> Allura kif nistgħu jtejbu fuq dan?

1396
01:05:51,240 --> 01:05:54,370
Ukoll, l-ewwel ejja tagħti tour malajr ta '
xi wħud mill-affarijiet li inti ser tara,

1397
01:05:54,370 --> 01:05:56,170
u mbagħad tagħti ħarsa lejn
ftit eżempji.

1398
01:05:56,170 --> 01:05:59,500
Allura wieħed, biex iserraħ ras, minħabba
aħna qed jtajru permezz PHP.

1399
01:05:59,500 --> 01:06:02,470
U naf, f'xi punt, inti ser ikollok
li attwalment tibda tikteb dan jekk inti

1400
01:06:02,470 --> 01:06:03,460
ma jkunux diġà.

1401
01:06:03,460 --> 01:06:06,220
Jirrealizzaw li, wieħed, prinċipali huwa tip
tal-tieqa ma PHP.

1402
01:06:06,220 --> 01:06:09,420
Jekk inti tixtieq li jikteb il-kodiċi li gets
esegwiti, inti biss tibda bil-miktub fil

1403
01:06:09,420 --> 01:06:13,970
fajl imsejjaħ. php sakemm
inti għandek il-kategorija miftuħa

1404
01:06:13,970 --> 01:06:15,620
kwistjoni mark PHP tag.

1405
01:06:15,620 --> 01:06:19,730
>> Iżda avviż dawn huma
kundizzjonijiet fil-PHP.

1406
01:06:19,730 --> 01:06:22,610
Avviż, dan huwa l-istess slide eżatt
kellna fil-ġimgħa meta kellna

1407
01:06:22,610 --> 01:06:25,670
kondizzjonijiet fil Kundizzjonijiet C.
PHP huma strutturalment u

1408
01:06:25,670 --> 01:06:27,140
sintattikament-istess.

1409
01:06:27,140 --> 01:06:30,290
Unika differenza reali hija jekk inti ħadthom ltqajna
varjabbli involuti, għandek dawk

1410
01:06:30,290 --> 01:06:31,600
sinjali dollaru.

1411
01:06:31,600 --> 01:06:33,970
>> Sadanittant, espressjonijiet Boolean
tfittex biss bħal dan għal

1412
01:06:33,970 --> 01:06:35,725
jew Ing jew u-Ing flimkien.

1413
01:06:35,725 --> 01:06:37,780
Swiċċijiet ħarsa eżattament l-istess.

1414
01:06:37,780 --> 01:06:42,180
X'hemm sbieħ fil-PHP, billi C,
swiċċijiet għandhom ikunu każijiet fuq

1415
01:06:42,180 --> 01:06:46,380
primitives bħal ints jew jaħraq, b'mod PHP
dikjarazzjonijiet każ tiegħek jista 'attwalment jiġi

1416
01:06:46,380 --> 01:06:48,430
fuq kordi sħiħ, li huwa
attwalment tip ta 'sbieħ.

1417
01:06:48,430 --> 01:06:49,480
Jiffranka inti xi żmien.

1418
01:06:49,480 --> 01:06:50,820
Ma setgħux jagħmlu dan fl C.

1419
01:06:50,820 --> 01:06:52,880
>> Hawn loop fil PHP.

1420
01:06:52,880 --> 01:06:53,740
Huwa identiċi.

1421
01:06:53,740 --> 01:06:55,400
Jista 'jkollha xi sinjali dollaru
għall-varjabbli.

1422
01:06:55,400 --> 01:06:57,530
Inti ma għandekx nsemmux li
xi ħaġa hija int.

1423
01:06:57,530 --> 01:07:00,580
Inti biss tiddikjaraha b'sinjal dollaru
u l-isem tal-varjabbli.

1424
01:07:00,580 --> 01:07:01,430
Iżda għall loop huwa l-istess.

1425
01:07:01,430 --> 01:07:02,760
A loop filwaqt li huwa l-istess.

1426
01:07:02,760 --> 01:07:04,870
A tagħmel filwaqt loop huwa l-istess.

1427
01:07:04,870 --> 01:07:06,170
>> Dan huwa xi ftit differenti.

1428
01:07:06,170 --> 01:07:12,410
Allura ma PHP, ma 'firxa, inti tista'
statikament jiddikjara firxa, kif fis-C,

1429
01:07:12,410 --> 01:07:14,420
imma tuża parentesi kwadri.

1430
01:07:14,420 --> 01:07:17,060
Fl C, inti tuża ċingi kaboċċi,
jekk inti anki taf li.

1431
01:07:17,060 --> 01:07:20,910
Iżda dan huwa attwalment komuni ħafna fil-PHP
li jiddikjara firxa, f'dan il-każ,

1432
01:07:20,910 --> 01:07:23,640
ta 'numri, u jitolbu l-
numri varjabbli.

1433
01:07:23,640 --> 01:07:25,300
>> Varjabbli infushom teżamina bħal dan.

1434
01:07:25,300 --> 01:07:28,710
Hawnhekk huwa string, nikkwota unquote "bonjour
dinja. "Inti jista 'jkollhom backslash n.

1435
01:07:28,710 --> 01:07:30,950
I sempliċiment ma f'dan il-każ.

1436
01:07:30,950 --> 01:07:32,640
>> Issa dan huwa tibni interessanti.

1437
01:07:32,640 --> 01:07:33,700
C ma jkollhiex dan.

1438
01:07:33,700 --> 01:07:34,700
Iżda dan huwa super utli.

1439
01:07:34,700 --> 01:07:38,160
U tkun taf tara dan P sett 7
spec - a għal kull jinbena.

1440
01:07:38,160 --> 01:07:41,800
Jekk inti tixtieq li jtennu fuq kollha ta 'l-
elementi l-firxa, inti ma għandekx

1441
01:07:41,800 --> 01:07:45,500
biex jittrattaw $ i $ u n,
u + +, u dak kollu.

1442
01:07:45,500 --> 01:07:47,640
Tista 'litteralment tgħid, fil-PHP, dan -

1443
01:07:47,640 --> 01:07:51,890
għal kull numri bħala numru, hekk
Jien wieħed jassumi li $ numri

1444
01:07:51,890 --> 01:07:53,380
huwa firxa ta 'numri.

1445
01:07:53,380 --> 01:07:56,460
U meta ngħid għal kull numri
bħala numru, dan se

1446
01:07:56,460 --> 01:08:00,505
awtomatikament, kif loop tiegħi tesegwixxi,
jaġġornaw, fuq kull iterazzjoni, il-valur

1447
01:08:00,505 --> 01:08:03,260
ġewwa ta 'numru sinjal dollaru -

1448
01:08:03,260 --> 01:08:07,730
għal darb'oħra, u għal darb'oħra, u għal darb'oħra mixi
għalija matul dak array.

1449
01:08:07,730 --> 01:08:08,735
Allura hija biss jiffranka us kodiċi.

1450
01:08:08,735 --> 01:08:12,250
Ebda semicolons, l-ebda + + "i, l-ebda i s,
ebda tal n, huwa biss sbieħ.

1451
01:08:12,250 --> 01:08:13,700
>> Iżda PHP wkoll dan.

1452
01:08:13,700 --> 01:08:14,830
U dan huwa super qawwija.

1453
01:08:14,830 --> 01:08:17,410
U inti ser tuża dan, idejn
fuq, f'P sett 7.

1454
01:08:17,410 --> 01:08:21,990
U firxa assoċjattiva huwa ddikjarat ukoll
ma parentesi kwadri.

1455
01:08:21,990 --> 01:08:23,569
Iżda avviż-sintassi issa.

1456
01:08:23,569 --> 01:08:26,880
Huwa reminixxenti ta 'dak li rajna
ma print_r mument ilu.

1457
01:08:26,880 --> 01:08:31,810
Kemm ċwievet, bħala verifika sanità ftit,
ma dan array jidhru li jkollhom.

1458
01:08:31,810 --> 01:08:32,689
>> Għalhekk għandha żewġ.

1459
01:08:32,689 --> 01:08:33,830
U I call dan array.

1460
01:08:33,830 --> 01:08:36,760
Iżda jekk dan jgħin, inti tista 'taħseb
ta 'din it-tabella bħala hash, jew bħala

1461
01:08:36,760 --> 01:08:37,930
firxa assoċjattiva.

1462
01:08:37,930 --> 01:08:39,580
Iżda din hija biss differenti
tip ta 'firxa.

1463
01:08:39,580 --> 01:08:41,080
U għal darb'oħra, lingwi differenti
jkollhom dawn.

1464
01:08:41,080 --> 01:08:43,810
Aħna ser tara xi ħaġa simili
fl JavaScript ukoll.

1465
01:08:43,810 --> 01:08:44,609
Hemm żewġ keys.

1466
01:08:44,609 --> 01:08:48,390
Wieħed huwa unquote kwotazzjoni, "simbolu," wieħed huwa
nikkwota unquote "prezz." U dawk keys

1467
01:08:48,390 --> 01:08:49,250
kull wieħed ikollhom valur.

1468
01:08:49,250 --> 01:08:54,420
F'dan il-każ il-valur simbolu huwa FB, għal
Valur Facebook, u l-prezz huwa 49, 26,

1469
01:08:54,420 --> 01:08:56,899
li kienet istokk Facebook
prezz ta 'dalgħodu.

1470
01:08:56,899 --> 01:09:00,170
>> Allura dak li huwa utli dwar
firxa assoċjattiva.

1471
01:09:00,170 --> 01:09:02,620
I seta 'kellu numerikament
array indiċjati mal biss

1472
01:09:02,620 --> 01:09:04,120
parentesi kwadri sempliċi.

1473
01:09:04,120 --> 01:09:09,380
U I seta 'kellu sinjal dollaru
kwotazzjoni ugwali biss dan.

1474
01:09:09,380 --> 01:09:10,529
Let me fatt jagħmlu dan.

1475
01:09:10,529 --> 01:09:14,796
Ejja ngħidu I minflok sempliċiment iddikjarata
dan array bħal dik.

1476
01:09:14,796 --> 01:09:17,590
Dan huwa perfettament valida,
sintattikament.

1477
01:09:17,590 --> 01:09:20,569
Ma jitlef l-ebda informazzjoni,
per se.

1478
01:09:20,569 --> 01:09:24,760
I xorta tara li s-simbolu jkun fb,
u li l-prezz huwa 49, 26.

1479
01:09:24,760 --> 01:09:28,939
Allura għaliex huma assoċjattiva
arrays konvinċenti?

1480
01:09:28,939 --> 01:09:30,189
>> UDJENZA: Inti ma għandekx tiftakar
fejn inti tpoġġi Jittieħed.

1481
01:09:30,189 --> 01:09:32,050

1482
01:09:32,050 --> 01:09:34,130
>> SPEAKER 1: Eżattament, inti ma għandekx
li tiftakar fejn inti tpoġġi Jittieħed.

1483
01:09:34,130 --> 01:09:37,670
Inti ma għandekx tiftakar arbitrarjament
dak is-simbolu istokk huwa fil-bracket żero,

1484
01:09:37,670 --> 01:09:41,479
u l-prezzijiet istokk huwa fil-bracket waħda,
li huwa partikolarment perikolużi jekk inti

1485
01:09:41,479 --> 01:09:43,220
ibiddlu l-affarijiet, eventwalment.

1486
01:09:43,220 --> 01:09:46,399
Huwa ħafna nicer li jassoċjaw
dak li aħna ser sejħa metadata

1487
01:09:46,399 --> 01:09:48,340
d-data attwali tiegħek.

1488
01:09:48,340 --> 01:09:52,399
I d jargumentaw li dak li aħna verament kura
dwar hawn huwa fb u 49, 26.

1489
01:09:52,399 --> 01:09:57,020
Is-simbolu u l-prezz huwa metadata
li jiddeskrivi d-data we

1490
01:09:57,020 --> 01:09:58,180
attwalment jimpurtahom.

1491
01:09:58,180 --> 01:10:01,910
Iżda din hija biss tant
aktar faċli għall-aċċess.

1492
01:10:01,910 --> 01:10:04,090
>> Issa, bħala twarrib x'hemm
il-prezz li nħallsu?

1493
01:10:04,090 --> 01:10:06,600
Imxejna qed tagħmel dan
fil CS50 għal ġimgħat.

1494
01:10:06,600 --> 01:10:10,740
Din il-karatteristika għandha toħroġ f'xi spejjeż.

1495
01:10:10,740 --> 01:10:11,350
Memorja.

1496
01:10:11,350 --> 01:10:13,830
Allura int mhux biss jaħżen 32-bit
numru sħiħ, per eżempju.

1497
01:10:13,830 --> 01:10:17,980
Inti ħażna simbolu / 0, probabbilment.

1498
01:10:17,980 --> 01:10:19,160
Allura inti qed tuża memorja aktar.

1499
01:10:19,160 --> 01:10:22,540
>> U x'inhu l-prestazzjoni ta '
tfittex xi ħaġa up fi

1500
01:10:22,540 --> 01:10:24,822
firxa assoċjattiva, probabbilment?

1501
01:10:24,822 --> 01:10:26,590
Huwa probabbilment aktar bil-mod.

1502
01:10:26,590 --> 01:10:29,670
Aċċess bl-addoċċ huwa sbieħ, speċjalment
meta inti tista 'tagħmel tfittxija binarja.

1503
01:10:29,670 --> 01:10:33,380
Imma jekk int fil-fatt issa qed ifittxu li ma
għan-numri, iżda għal kordi, dan

1504
01:10:33,380 --> 01:10:37,630
verament huwa implimentat taħt il-
barnuża, probabbilment bħala tabella hash, fejn

1505
01:10:37,630 --> 01:10:42,950
tuża jew tabella hash
ma ikkatenar separata.

1506
01:10:42,950 --> 01:10:46,040
Jew tuża jipprova li attwalment
jaħżnu l-valuri.

1507
01:10:46,040 --> 01:10:50,550
Allura forsi inti tista 'tagħmel ħin kostanti, iżda
inti xorta għandek tfittex fil S-Y-M-B-O-L,

1508
01:10:50,550 --> 01:10:54,510
potenzjalment, minflok sempliċiment 32
bits biex tfittex xi ħaġa up.

1509
01:10:54,510 --> 01:10:58,430
Għalhekk għal darb'oħra, dawk l-istess ideat li ġejjin
lura li jerġa 'jiġri f'dan il-kuntest.

1510
01:10:58,430 --> 01:11:02,120
>> Iżda għal darb'oħra, PHP issa għandha xi super
globals li, jirriżulta, huma

1511
01:11:02,120 --> 01:11:02,900
arrays assoċjattiva.

1512
01:11:02,900 --> 01:11:05,590
Rajna wieħed mument ilu, $ _POST.

1513
01:11:05,590 --> 01:11:08,400
U li jinħtieġu sforzi globali super
ċwievet u valuri.

1514
01:11:08,400 --> 01:11:10,550
Speċifikament, il-keys
line up ma 'dak?

1515
01:11:10,550 --> 01:11:14,520
Fejn l-ċwievet $ _POST jiġu minn?

1516
01:11:14,520 --> 01:11:15,380
Just biex terġa?

1517
01:11:15,380 --> 01:11:16,480
>> UDJENZA: Isem.

1518
01:11:16,480 --> 01:11:17,900
>> SPEAKER 1: Isem, fejn?

1519
01:11:17,900 --> 01:11:19,860
>> UDJENZA: [inaudible]

1520
01:11:19,860 --> 01:11:20,750
>> SPEAKER 1: Isem l-attribut.

1521
01:11:20,750 --> 01:11:23,480
Ukoll fejn, meta ma huma
oriġinarjament ġejjin minn?

1522
01:11:23,480 --> 01:11:24,120
Il-forma.

1523
01:11:24,120 --> 01:11:30,140
Mela jekk page HTML għandha tag forma,
ġewwieni tagħhom huma xi inputs, bħal

1524
01:11:30,140 --> 01:11:34,760
kaxxi verifika, kaxxi test, drop down
menus, kull wieħed minnhom għandu l-isem, dawk

1525
01:11:34,760 --> 01:11:40,260
ismijiet jispiċċaw bħala ċwievet fil $ _POST, u,
franchement, għal dik il-kwistjoni, $ _GET.

1526
01:11:40,260 --> 01:11:42,130
Jekk il-metodu huwa get, l-istess idea.

1527
01:11:42,130 --> 01:11:43,830
Huwa biss fil-super globali differenti.

1528
01:11:43,830 --> 01:11:47,620
U l-valuri, naturalment, jiġu minn
x'ikun l-utent ittajpjat f'mill tiegħu jew

1529
01:11:47,620 --> 01:11:48,890
browser tagħha.

1530
01:11:48,890 --> 01:11:49,830
>> Iżda hemm ftit oħrajn.

1531
01:11:49,830 --> 01:11:52,140
Hemm cookie, li aħna ser
terga 'lura biex eventwalment.

1532
01:11:52,140 --> 01:11:56,050
Iżda dawk huma l-affarijiet li taf
il-web għal xi użi tajjeb jew ħażin.

1533
01:11:56,050 --> 01:11:57,420
Iżda aħna ser terga 'lura għal dan.

1534
01:11:57,420 --> 01:12:01,720
Server u sessjoni, u dawk iż-żewġ
għandhom xi utilità speċjali.

1535
01:12:01,720 --> 01:12:03,940
>> Imma ejja tagħti ħarsa lejn dan.

1536
01:12:03,940 --> 01:12:13,330
Let me imorru quddiem u tiftaħ eżempju
imsejħa mvc0.php Allura MVC

1537
01:12:13,330 --> 01:12:14,900
stands għal dan li ġej.

1538
01:12:14,900 --> 01:12:19,390
U aħna jintroduċu dan qabel huwa
tipiku, verament, inti tikseb tfassil

1539
01:12:19,390 --> 01:12:22,180
Sett problema 7, u wkoll proġetti finali,
fil-tip ta 'industrija

1540
01:12:22,180 --> 01:12:23,670
mod standard, u l-mod nadif.

1541
01:12:23,670 --> 01:12:24,820
Huwa disinn tajjeb.

1542
01:12:24,820 --> 01:12:29,090
>> Allura int ser tara, u tkun taf
esperjenza, b'mod P sett 7, paradigma, sort

1543
01:12:29,090 --> 01:12:32,260
ta 'mentalità programmazzjoni, li jistenna
ftit xi ħaġa bħal din.

1544
01:12:32,260 --> 01:12:35,570
M għal Mudell, C għall Kontrollur,
V għall View.

1545
01:12:35,570 --> 01:12:39,690
Long storja qasira, MVC huwa biss tip
ta 'metodoloġija, mod ta' teħid

1546
01:12:39,690 --> 01:12:43,360
websajts, b'mod partikolari, fejn inti
jitqiegħdu kollha ta 'tiegħek, frażi stupid -

1547
01:12:43,360 --> 01:12:44,970
loġika tan-negozju -

1548
01:12:44,970 --> 01:12:49,710
kollha tal-proprjetà intellettwali tiegħek
dak li sejjaħ kontrollur, fajl

1549
01:12:49,710 --> 01:12:54,840
bħal index.php, jew aħna ser tara,
quote.php, jew buy.php.

1550
01:12:54,840 --> 01:12:59,570
>> Fil-kuntest ta 'sett Problem 7, tiegħek
mudelli tipikament fihom data tiegħek,

1551
01:12:59,570 --> 01:13:03,860
kull ħaġa relatati ma 'database, kif aħna ser
eventwalment tara, u l-fehmiet tiegħek

1552
01:13:03,860 --> 01:13:07,510
fihom l-estetika tal tiegħek
sit, l-HTML, CSS.

1553
01:13:07,510 --> 01:13:10,420
Allura aħna diġà raw dan fis-C ftit
daqsxejn bl-użu. fajls h.

1554
01:13:10,420 --> 01:13:15,010
Aħna verament raw dan mument ilu ma CSS,
mill factoring l stylization CSS

1555
01:13:15,010 --> 01:13:16,520
Jittieħed out ta HTML tagħna.

1556
01:13:16,520 --> 01:13:20,730
>> Allura MVC huwa verament biss dwar tfassil
linji fil-ramel u qal, l-

1557
01:13:20,730 --> 01:13:25,400
kodiċi ta 'programmazzjoni interessanti għall tiegħek
website jappartjeni fil dak li aħna inneħħu sejħa tal-

1558
01:13:25,400 --> 01:13:26,400
kontrollur.

1559
01:13:26,400 --> 01:13:29,280
Jittieħed relatati ma 'database tipikament
jispiċċa fil-mudell.

1560
01:13:29,280 --> 01:13:33,070
Imma inti taf tara, fil-sett Problem 7, aħna
jingħaqdu C u M li jżommha sempliċi.

1561
01:13:33,070 --> 01:13:37,630
Iżda ħsieb huwa fejn kollha ta 'HTML tiegħek
u l-estetika tipikament jmorru.

1562
01:13:37,630 --> 01:13:39,160
>> Allura dak li jfisser dan f'termini reali?

1563
01:13:39,160 --> 01:13:45,980
Well, let me go fis MVC tagħna
direttorju kif ġej.

1564
01:13:45,980 --> 01:13:48,880
U tkun taf tara aktar minn dawn
daret kollu jgħaddi spec.

1565
01:13:48,880 --> 01:13:53,200
Għalhekk fl mvc0, I jsostnu li din hija, bħal,
Verżjoni 0 ta 'websajts CS50 tal.

1566
01:13:53,200 --> 01:13:56,670
>> Kollha għandna huwa xi HTML, bħal
tag h1 big, apparentement.

1567
01:13:56,670 --> 01:13:57,800
U mbagħad lista bulleted.

1568
01:13:57,800 --> 01:13:59,860
Stajt qatt lista bulleted
qabel, iżda l-ebda big deal.

1569
01:13:59,860 --> 01:14:01,590
Ejja malajr tħares lejn il-kodiċi sors.

1570
01:14:01,590 --> 01:14:06,610
Jinstabx lista unordered mal-balal
hija miftuħa ul bracket ma 'wieħed jew

1571
01:14:06,610 --> 01:14:09,065
oġġetti aktar lista, li.

1572
01:14:09,065 --> 01:14:10,650
Allura avviż hawnhekk hija tag ankra.

1573
01:14:10,650 --> 01:14:12,130
Rajna li mument ilu.

1574
01:14:12,130 --> 01:14:13,810
>> Allura dan huwa kif I implimentati
din il-paġna.

1575
01:14:13,810 --> 01:14:18,460
Stajt ltqajna żewġ links, żewġ oġġetti lista, wieħed
ul għal-lista unordered, u t-tmiem

1576
01:14:18,460 --> 01:14:22,700
riżultat, estetikament, hija din ħafna
website pretty, verżjoni 0 hawn.

1577
01:14:22,700 --> 01:14:26,840
Imma x'hemm interessanti issa hija kif dan
huwa implimentat taħt il-barnuża.

1578
01:14:26,840 --> 01:14:33,590
>> Let me go fis gedit u jiftħu dan
ewwel eżempju li jagħti stampa.

1579
01:14:33,590 --> 01:14:37,070
U aħna ser tħares lejn x'hemm difettuż,
potenzjalment, fil hawn.

1580
01:14:37,070 --> 01:14:43,260
Issa jekk immur fis localhost, pubbliku,
MVC, avviż fajls ftit.

1581
01:14:43,260 --> 01:14:45,780
Jien ser sejħa dawn, għall-
mument, kontrolluri kollha.

1582
01:14:45,780 --> 01:14:48,640
Iżda li l-daqsxejn ta 'abbuż minħabba
tkun taf tara dak kollu s mħallta

1583
01:14:48,640 --> 01:14:49,620
ġewwa minnhom.

1584
01:14:49,620 --> 01:14:52,330
>> U let me go ġewwa tal index.php.

1585
01:14:52,330 --> 01:14:54,700
U naraw, litteralment, l-istess HTML.

1586
01:14:54,700 --> 01:14:57,970
Allura anke jekk dan il-fajl tispiċċa fl
. PHP, Huwa ma jfissirx li għandha

1587
01:14:57,970 --> 01:14:59,500
xi kodiċi PHP.

1588
01:14:59,500 --> 01:15:02,290
Hija tista 'sempliċement tkun HTML prima, għalkemm
dan huwa tip ta 'iblah.

1589
01:15:02,290 --> 01:15:07,650
Imma avviż hemm ebda bracket PHP miftuħa
tag, ħlief għal dan, li, franchement,

1590
01:15:07,650 --> 01:15:09,160
huwa biss hemm biex isservi bħala kumment.

1591
01:15:09,160 --> 01:15:12,080
Imma dak li mhux funzjonalment
anke dik interessanti.

1592
01:15:12,080 --> 01:15:12,960
>> Iżda Avviż dan.

1593
01:15:12,960 --> 01:15:15,400
X'hemm interessanti issa huwa dak
bidliet f'din il-paġna.

1594
01:15:15,400 --> 01:15:16,650
Let me ikklikkja Lectures.

1595
01:15:16,650 --> 01:15:18,560
U avviż tad-URL wasal biex jinbidel.

1596
01:15:18,560 --> 01:15:20,930
Issa jien fil lectures.php.

1597
01:15:20,930 --> 01:15:22,630
Let me ikklikkja żero.

1598
01:15:22,630 --> 01:15:27,200
Issa jien fil week0.php U issa ejja
me tiftaħ dawn il-fajls fil gedit.

1599
01:15:27,200 --> 01:15:30,120
Mhux biss indiċi, iżda let
me jiftħu lectures.

1600
01:15:30,120 --> 01:15:33,900
U let me jeħles mill-kummenti
li tiffoka fuq din il-parti biss.

1601
01:15:33,900 --> 01:15:37,680
>> U issa let me jiftħu biss waħda aktar,
week0.php, armih-kummenti,

1602
01:15:37,680 --> 01:15:39,910
biss biex tnaddaf dan up.

1603
01:15:39,910 --> 01:15:41,720
U issa avviż li ġej.

1604
01:15:41,720 --> 01:15:47,340
Thinking verament tip ta 'bir-reqqa dwar
disinn, u ejja jagħmilha linja

1605
01:15:47,340 --> 01:15:52,013
l-istess, x'jista 'jsir
aħjar hawnhekk, taħseb?

1606
01:15:52,013 --> 01:15:56,450

1607
01:15:56,450 --> 01:15:57,780
>> Kif ma nagħmel ġimgħa?

1608
01:15:57,780 --> 01:15:58,480
Kif dwar dan.

1609
01:15:58,480 --> 01:16:00,450
Allura dan huwa kif I magħmula ġimgħa.

1610
01:16:00,450 --> 01:16:08,290
I marru sa File, New, Paste, Save,
week1.php, u mbagħad I marru fil hawn.

1611
01:16:08,290 --> 01:16:09,875
U I mibdula waħda -

1612
01:16:09,875 --> 01:16:11,646
dak li kien dan, wieħed sal-Ġimgħa.

1613
01:16:11,646 --> 01:16:14,430

1614
01:16:14,430 --> 01:16:15,810
I biddel il-żerijiet għal wieħed.

1615
01:16:15,810 --> 01:16:17,150
I mibdula din għal wieħed.

1616
01:16:17,150 --> 01:16:20,350
>> OK, hekk issa tħares lejn fajls tiegħi.

1617
01:16:20,350 --> 01:16:22,100
X'jista 'jsir b'mod differenti?

1618
01:16:22,100 --> 01:16:25,310
Fejn hi l-opportunità, forsi?

1619
01:16:25,310 --> 01:16:28,330
Allura hemm l-opportunità li jibdew
factoring dan il-għalf out.

1620
01:16:28,330 --> 01:16:32,950
Let me jiftħu, bħala spoiler, għal
dak li inti ser tara fil P sett 7.

1621
01:16:32,950 --> 01:16:38,750
Jekk I jiftħu, issa, index.php fil-verżjoni
ħamsa ta 'dan, jidher mod

1622
01:16:38,750 --> 01:16:40,730
aktar cryptic, ċertament.

1623
01:16:40,730 --> 01:16:43,710
>> Iżda dan, issa, huwa dak I ser sejħa
kontrollur thats kontroll tal-

1624
01:16:43,710 --> 01:16:44,770
loġika tal-paġna tiegħi.

1625
01:16:44,770 --> 01:16:48,510
U inti tista 'tip ta' rikostruzzjoni,
intuwittivament, forsi, x'inhu għaddej.

1626
01:16:48,510 --> 01:16:50,630
Fuq l-ewwel linja, huwa
ftit cryptic.

1627
01:16:50,630 --> 01:16:54,040
Imma avviż jien jeħtieġu, bħal ma
sharp jinkludu, fajl imsejjaħ

1628
01:16:54,040 --> 01:16:55,930
helpers.php.

1629
01:16:55,930 --> 01:16:59,980
U allura jien ssejjaħ, apparentement, a
funzjoni, imsejħa jirrendi, li jgħaddi b'mod

1630
01:16:59,980 --> 01:17:00,850
żewġ argumenti.

1631
01:17:00,850 --> 01:17:02,440
>> Wieħed huwa unquote kwotazzjoni, header.

1632
01:17:02,440 --> 01:17:04,800
U l-oħra, liema tip ta '
tip ta 'data hija din, ibbażata

1633
01:17:04,800 --> 01:17:07,180
fuq sintassi tagħna qabel?

1634
01:17:07,180 --> 01:17:08,160
Huwa ta 'firxa assoċjata.

1635
01:17:08,160 --> 01:17:11,730
Speċifikament, huwa jgħaddi fit-titolu
ma 'xi metadata li jfakkar

1636
01:17:11,730 --> 01:17:13,430
me dak li hu u l-valur tagħha.

1637
01:17:13,430 --> 01:17:16,340
Imbagħad I tara hard kodifikati
ul, għalhekk xi HTML prima.

1638
01:17:16,340 --> 01:17:20,020
Imma allura jien lura fil-modalità PHP
ssejjaħ jirrendi funzjoni.

1639
01:17:20,020 --> 01:17:24,390
Għalhekk anki jekk inti stajt qatt jintużaw HTML jew PHP
qabel, u anki jekk dan jistenna

1640
01:17:24,390 --> 01:17:27,480
scarier, għaliex huwa probabbli li dan
disinn aħjar?

1641
01:17:27,480 --> 01:17:31,310
X'hemm aħjar dwar dan,
ibbażata fuq inferenza?

1642
01:17:31,310 --> 01:17:32,130
>> UDJENZA: [inaudible]

1643
01:17:32,130 --> 01:17:35,750
>> SPEAKER 1: Inqas żejda f'dak
hemm l-ebda lametta aktar HTML, mhux aktar

1644
01:17:35,750 --> 01:17:38,410
irjus, lametta korp mhux aktar
f'kull fajl kkritikat.

1645
01:17:38,410 --> 01:17:41,860
Minflok, stajt fatturati l-
affarijiet komuni u preżumibbilment jpoġġuhom

1646
01:17:41,860 --> 01:17:45,150
fis-fajl relatat b'xi mod
għal header.

1647
01:17:45,150 --> 01:17:48,500
U istess ħaġa għall-korp mill-qrib
tag, il-lametta HTML qrib.

1648
01:17:48,500 --> 01:17:52,165
Li probabbilment isfel hawn ġewwa
tal-footer x'imkien.

1649
01:17:52,165 --> 01:17:57,050
U tkun taf ara, b'mod sett Problem 7,
tour ftit permezz ta 'dan.

1650
01:17:57,050 --> 01:17:58,070
>> Allura dak li jinsab quddiem?

1651
01:17:58,070 --> 01:18:03,390
L-unika ħaġa li għandna ma l-abbiltà
għadu għal huwa li attwalment jaħżnu data.

1652
01:18:03,390 --> 01:18:06,110
U għalhekk dak li aħna ser tibda tara
L-Erbgħa, per eżempju, huwa li tiegħek

1653
01:18:06,110 --> 01:18:08,450
qodma ħabib Excel, jew numri,
jippermettilek li taħżen lottijiet ta '

1654
01:18:08,450 --> 01:18:10,060
data fir-ringieli u kolonni.

1655
01:18:10,060 --> 01:18:12,570
Jinstabx inti tista 'tagħmel dan fil x'hemm
imsejħa 'database, programmatically.

1656
01:18:12,570 --> 01:18:16,620
manija U jirriżulta, wara li,
aħna ser tkun kapaċi li jaħżen affarijiet simili

1657
01:18:16,620 --> 01:18:20,550
dan, li tkun taf tara mill-ġdid fl P sett
7, mazz sħiħ ta 'usernames u

1658
01:18:20,550 --> 01:18:23,690
passwords, b'dawn tal-aħħar huma
attwalment encrypted, simili ħafna huma

1659
01:18:23,690 --> 01:18:25,550
kienu fl-edizzjoni Hacker P sett 2 ta.

1660
01:18:25,550 --> 01:18:29,600
U eventwalment, inti ser timplimenta dan,
stess website Etrade-like tiegħek li

1661
01:18:29,600 --> 01:18:32,220
timplimenta kollettivament CS50 finanzi.

1662
01:18:32,220 --> 01:18:36,000
>> Fl-aħħar nett, peress li inti qagħdu hawn tant tard
illum, jekk inti terga 'lura għal din il-parti

1663
01:18:36,000 --> 01:18:41,120
ta 'kampus, fil 04:00 llum, aħna se
jagħtuk mhux biss parir, fuq il-SCEs

1664
01:18:41,120 --> 01:18:44,200
Jingħataw pariri Ġust, fil 16:00 fil-
Maxwell-Dworkin, aħna ser jagħtuk xi

1665
01:18:44,200 --> 01:18:47,470
Americone Dream, Cherry Garcia,
Ċikkulata Fudge Brownie, Ċikkulata

1666
01:18:47,470 --> 01:18:50,840
Għaġina cookie ċippa, u, meta inti Google
Monkey chunky, ikollok dan.

1667
01:18:50,840 --> 01:18:53,620
Allura kollha ta 'dak jistenna fi 4:00
PM fil Maxwell-Dworkin.

1668
01:18:53,620 --> 01:18:56,736
Ara inti fuq l-Erbgħa ukoll.

1669
01:18:56,736 --> 01:18:59,960
>> SPEAKER 2: Fil-li jmiss
CS50, RJ jorqod pulzieri

1670
01:18:59,960 --> 01:19:03,656

1671
01:19:03,656 --> 01:19:04,906
>> RJ: taqsima My!

1672
01:19:04,906 --> 01:19:07,727

1673
01:19:07,727 --> 01:19:08,977
Ha!

1674
01:19:08,977 --> 01:19:12,056

1675
01:19:12,056 --> 01:19:13,306
Oh,

1676
01:19:13,306 --> 01:19:16,374