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>> [Daqq ta mużika]

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00:00:03,920 --> 00:00:11,760

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>> DAVID J. Malan: Kull dritt.

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Dan huwa CS50.

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00:00:15,640 --> 00:00:17,620
Dan huwa l-bidu ta 'tmien ġimgħat.

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U inti tista 'tfakkar li aħna jitħalla' off
aħħar darba tħares lejn lingwa ġdida

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00:00:22,440 --> 00:00:23,240
għal kollox.

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00:00:23,240 --> 00:00:25,905
Fil-fatt, wieħed li pjuttost
ħfief u mhuwiex anki

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00:00:25,905 --> 00:00:26,940
lingwa ta 'programmar.

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00:00:26,940 --> 00:00:31,100
Huwa lingwa markup li tikri us
attwalment istruttura u l-paġni web.

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00:00:31,100 --> 00:00:33,350
U meta inti xi ħaġa oħra
flimkien ma this--

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jew inti dalwaqt se, jekk
inti ma jkunux diġà.

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00:00:35,670 --> 00:00:38,530
Aħna qed tmur biex tuża Cascading
Folji stil, jew CSS, li

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00:00:38,530 --> 00:00:40,971
hija tip ieħor ta 'lingwa
bi proprjetajiet u l-valuri

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00:00:40,971 --> 00:00:43,220
li għaddej biex jgħidilna jagħmlu
affarijiet bħall jibdlu l-kulur

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u jibdlu l-pożizzjoni
u dawn it-tipi ta 'tweaks.

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Imma llum u onward, nibdew biex
tiffoka fuq il-lingwi aktar qawwija,

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lingwi ta 'programmar attwali bħal PHP.

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>> Allura PHP kien madwar għal xi żmien.

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U kif tkun taf tara, dan
kienet imfassla primarjament

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kmieni għall-attwali
użu fil iżvilupp tal-web

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u fil-fatt jiġġeneraw paġni web.

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Allura dak tipi ta '
Karatteristiċi ma 'lingwa

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bżonn sabiex jagħmlu web
paġni dinamiku magħha?

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>> Fi kliem ieħor, jekk inti tixtieq li jiġġeneraw
kontenut dynamically-- bħal Facebook

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Newsfeed, li tbiddel b'mod kostanti, jew
messaġġi instantanji li pop up minn żmien

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li time-- bħall x'inhu l-
parti ewlenija ta 'funzjonalità

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għandek bżonn fil-lingwa ta 'programmar
li tavżak dinamikament

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jistampa informazzjoni ġdida għall-iskrin?

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>> STUDENT: Kodiċi.

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DAVID J. Malan: Kodiċi.

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OK.

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Aħna ser jieħdu dik.

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A ftit aktar preċiża.

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I mean, stajna nagħmlu
dan ma 'C, franchement.

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Ikun uġigħ fl-għonq.

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But-- huwa dan l-impenn?

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>> STUDENT: Yeah.

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Varjabbli, forsi?

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DAVID J. Malan: Varjabbli.

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OK, żgur.

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Varjabbli jista 'ċertament jgħin us out.

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U anke xi ħaġa sempliċi.

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We użati fl-ewwel
programm ta 'l-ewwel jum

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meta aħna attwalment qal "Hello dinja."

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>> STUDENT: Stampa.

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>> DAVID J. Malan: Stampa, id-dritt?

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Stampa, jew printf fil-
dinja ta 'C. Allura dan il-ħin,

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aħna kellna fil tagħna
rimi ta 'language-- C,

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fil particular-- u anki
Scratch għal dik il-kwistjoni li

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jistgħu jiġġeneraw spag ta 'test.

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>> Ukoll, jekk HTML, kif rajna aħħar ġimgħa, hija
biss mazz sħiħ ta 'spag ta' test

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għalkemm parentesi miftuħa u magħluqa
parentesi u xi tip ta 'rima

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u r-raġuni wara dan,
ukoll allura nistgħu verament

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tibda jiġġeneraw paġni tal-web jew
manwalment billi jittajpja minnhom fl gedit

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jew Microsoft Word, għal dak
matter-- aħna biss bżonn ta 'editur test.

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>> Jew nistgħu jikteb il-kodiċi,
għas-suġġeriment tiegħek

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qabel, li let us
dinamikament jiġġeneraw HTML,

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u dak hu li aħna qed tmur
biex tibda tagħmel ma PHP

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u finalment anke ma '
lingwa imsejħa JavaScript,

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huwa juża l-lingwa waħda biex jiġġeneraw ieħor.

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U fil-fatt, dan huwa dak Facebook
u ħafna, ħafna siti oħra

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tagħmel biex attwalment dinamikament
juri l-informazzjoni ġdida għalik.

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>> Mela ejja tibda bil this-- a
cryptic linja tfittex, iżda wieħed

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li attwalment pretty qawwija.

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S'issa, aħna kont qed tuża C,
li hija lingwa kkompilata.

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U biss recap-- malajr a kkompilata
lingwa jkun dak karatteristika?

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Ovvjament għandek bżonn biex jikkompilaw
dan, imma dak ma jfisser?

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Yeah?

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>> STUDENT: Jeħtieġ li jkun
mmuntati fi kodiċi magna.

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>> DAVID J. Malan: OK.

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Jeħtieġ li jiġi mmuntat
f'Kodiċi magna.

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Allura inti tieħu kodiċi sors tiegħek,
li huwa tip ta 'l-Ingliż simili.

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Inti jikkonvertu li biex
xi ħaġa livell aktar baxx,

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li huwa finalment tissejjaħ
oġġett code-- 0 u 1 ta.

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U huwa dawk 0 u 1 li
CPU, bħal dawk magħmula minn Intel,

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attwalment jifhmu.

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>> Issa, PHP u Python u Ruby u
JavaScript u għenieqed ta 'oħrajn

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lingwi mhumiex kumpilati
lingwi iżda interpretat lingwi,

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00:03:23,190 --> 00:03:26,630
li jfisser li inti biss tip lilhom u mbagħad
inti ma jibdluhom fi 0 u 1 ta.

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Inti minflok sempliċiment jipprovdu imbagħad bħala
input għall-programm xi ħadd ieħor,

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jissejjaħ interpretu.

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U dik il-persuna
programm ġie mfassal

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biex jifhem dak li kull wieħed u
kull simbolu fl-Python jew PHP

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jew Ruby jew kwalunkwe numru ta '
lingwi oħra ifisser.

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>> U hekk kollha għandna bżonn huwa
xi ħaġa bħal din.

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Allura fil-fatt, jien ser
jmorru fuq l-appliance

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hawn, biss fi kwalunkwe
tieqa qodma, u aħna qed

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se jmorru 'l quddiem u miftuħa
fajl imsejjaħ, jgħidu, bonjour.

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00:03:52,580 --> 00:03:55,780
Issa qabel, I jista 'jkollhom ffrankati
dan anke ma 'estensjoni fajl,

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00:03:55,780 --> 00:03:57,910
imma jien ser tagħmel
xi ħaġa saħansitra aktar sempliċi hawn.

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Jien ser jimxi 'l quddiem u tibda
dan il-fajl ma 'dan sintassi cryptic.

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Allura "utent, bin, ENV,
għall-ambjent, PHP. "

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>> Din hija sempliċement linja waħda tal-kodiċi li l-
ser jgħidlek sistema operattiva tiegħi,

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jmorru jsibu fl lokali tiegħek
ambjent x'ikun jiġifieri,

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kulfejn PHP is-- l interpreter--
u jimxi 'l quddiem u l-użu li interpretu

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li tinterpreta l-kodiċi li ġej.

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Issa, dan huwa tip ta '
karatteristika ikrah ta 'PHP.

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Iżda f'din il-lingwa, kwalunkwe
darba li inti tikteb kodiċi PHP,

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ikollok bżonn li jkollhom waħda minn dawn ikrah
Tags PHP jiddemarkaw il-bidu

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tal tiegħek code-- <? PHP.

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>> Iżda taħt hawn, I tista 'issa tagħmel xi ħaġa
pjuttost sempliċi, bħal printf comma bonjour

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00:04:37,430 --> 00:04:40,922
dinja qrib backslash n
kwotazzjoni, parentesi qrib.

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U mbagħad biss għall-tajba
miżura, jien ser

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jimxi 'l quddiem u qrib
tag PHP tiegħi hawn fuq

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sabiex kollox jistenna
nicely pretty stampati.

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>> U malli I ikklikkja Save,
gedit huwa attwalment intelliġenti biżżejjed

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00:04:50,780 --> 00:04:54,620
li tħares lejn dak ħafna ewwel linja u
realizzata, oh, int bil-miktub kodiċi PHP.

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Let me jenfasizzaw sintassi
bl-kuluri

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hawn hekk li inhi
out ftit aktar.

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Imma issa jien se jmorru
l isfel għall-tieqa terminal tiegħi.

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00:05:01,300 --> 00:05:02,340
I ser zoom.

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>> Dan il-programm kienet imsejħa "hello,"
hekk jien ser tagħmel dot mmejla hello,

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iżda permess miċħuda.

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U bash.

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Aħna fil-fatt semgħu dak
ġimgħat ħaġa koppja ilu

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00:05:10,610 --> 00:05:13,140
fil-kuntest ta 'Shellshock,
wieħed minn dawk bugs.

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>> Iżda permess ċaħad Rajna
qabel, forsi f'kuntest differenti.

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Ma xi ħadd jitfakkar kif
inti tista 'tiffissa xi ħaġa

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Fejn permess ikun miċħud bħal din?

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X'hemm l-kmand, għall-inqas?

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>> STUDENT: chmod.

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DAVID J. Malan: Yeah, chmod,
għat-tibdil tal-mod ta 'fajl.

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U int ser tingħata l-aktar użati biex
din il-ġimgħa d-dieħla bi problema sussegwenti

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sett.

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Iżda għal issa, jien se jibdlu
il-modalità li ma tkunx tista 'tinqara,

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imma li jagħtu executeability kulħadd
privileġġi, l-abbiltà

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biex imexxu dan il-fajl.

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00:05:37,710 --> 00:05:40,360
U jien ser tassenja
li għall-fajl bonjour.

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00:05:40,360 --> 00:05:45,150
>> Jekk I issa do dot mmejla bonjour jidħlu, inti
tara, fil-fatt, programm tiegħi, Hello dinja.

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U dak il-pass ma I
skip ċar għal kollox?

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Kumpilazzjoni.

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00:05:49,520 --> 00:05:51,680
So I biss dam dan il-programm sempliċiment.

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>> U jirriżulta out inti tista 'tagħmel dan ma'
lott ta 'sintassi reminixxenti ta' C.

135
00:05:55,690 --> 00:06:03,400
Let me jmorru fl għal kodiċi tal-lum,
li nressaq fis-direttorju vhost tiegħi

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00:06:03,400 --> 00:06:05,250
hawn, għal raġunijiet veri
aħna ser terga 'lura għal.

137
00:06:05,250 --> 00:06:09,350
U jien se jmorru fi,
ejja ngħidu, kondizzjonijiet 1.

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00:06:09,350 --> 00:06:12,450
>> U tkun taf tara hawn, l-ewwel u
qabel kollox, mazz sħiħ ta 'kummenti.

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Iżda dan huwa attwalment
a-ħolqien mill-ġdid fil-PHP

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ta 'programm għamilna fil-ġimgħa
wieħed imsejjaħ kondizzjonijiet 1.c

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00:06:18,960 --> 00:06:20,690
fejn l-iskop fil-
ħajja ta 'dan il-programm

142
00:06:20,690 --> 00:06:22,950
hija apparentement li jistaqsi
l-utent għal integer

143
00:06:22,950 --> 00:06:25,270
u mbagħad jagħmlu xi fluffy
analiżi fuqha biha

144
00:06:25,270 --> 00:06:29,510
inti tgħidli jekk huwa pożittiv jew
negattiv jew żero.

145
00:06:29,510 --> 00:06:34,220
U jien iġibu dan up biss għaliex,
ħlief għal forsi dettall ftit wieħed,

146
00:06:34,220 --> 00:06:37,150
huwa indistingwibbli s'issa mill C.

147
00:06:37,150 --> 00:06:39,930
>> X'hemm-karatteristika waħda
hawnhekk li forsi jumps out

148
00:06:39,930 --> 00:06:41,410
fi inti bħala ftit differenti?

149
00:06:41,410 --> 00:06:42,160
Forsi żewġ affarijiet.

150
00:06:42,160 --> 00:06:42,660
Yeah?

151
00:06:42,660 --> 00:06:44,070
>> STUDENT: Dollar sinjal n?

152
00:06:44,070 --> 00:06:44,944
>> DAVID J. Malan: Yeah.

153
00:06:44,944 --> 00:06:46,210
Allura sinjal dollaru n huwa preżenti.

154
00:06:46,210 --> 00:06:48,120
U sinjali dollaru, kif
Ser naraw, ser

155
00:06:48,120 --> 00:06:51,460
li jkun jiffissaw għall-bidu
ta 'kwalunkwe varjabbli fil-PHP.

156
00:06:51,460 --> 00:06:54,250
Huwa tnejn tajbin tajba u bad-- fl
li huwa tip ta 'ovvju x'hemm

157
00:06:54,250 --> 00:06:56,797
varjabbli, ħażina fil li huwa
Énième ħaġa għat-tip.

158
00:06:56,797 --> 00:06:58,630
U hemm waħda oħra
Ħaġa aħna ma pjuttost

159
00:06:58,630 --> 00:07:00,876
jidher, għallinqas minn dan ortografija. yeah?

160
00:07:00,876 --> 00:07:01,630
>> STUDENT: Readline.

161
00:07:01,630 --> 00:07:02,671
>> DAVID J. Malan: Readline.

162
00:07:02,671 --> 00:07:06,550
Readline aħna ma tara, per se, fil
C, anki jekk teżisti xi ħaġa

163
00:07:06,550 --> 00:07:09,530
simili, imma aħna ħadthom użati getstring,
u dan huwa kontroparti tagħha.

164
00:07:09,530 --> 00:07:12,950
Hekk jekk I tmur fis dan
direttorju, li jiġri li jkun,

165
00:07:12,950 --> 00:07:18,030
kif I ser jispjegaw fil-daqsxejn fl vhost tiegħi
direttorju u s-sors tiegħi A tad-direttorju,

166
00:07:18,030 --> 00:07:22,730
u I jimxi 'l quddiem u jagħmlu dot mmejla
conditions-- whoops-- dot mmejla

167
00:07:22,730 --> 00:07:26,710
kondizzjonijiet 1, tkun taf tara, għal darb'oħra,
l-istess permess issue-- miċħuda.

168
00:07:26,710 --> 00:07:33,610
>> So let me zoom fi u jagħmlu chmod plus
x fuq il-kundizzjonijiet, kondizzjonijiet dot mmejla.

169
00:07:33,610 --> 00:07:35,222
Nixtieq integer, jekk jogħġbok, 50.

170
00:07:35,222 --> 00:07:36,930
U nistgħu jilagħbu din
logħba ġurnata kollha twil.

171
00:07:36,930 --> 00:07:39,140
Li għaddej biex jaġixxu eżattament
kif għamlet fil-ġimgħa.

172
00:07:39,140 --> 00:07:42,860
>> OK hekk mhux kollha li differenti, ħlief
mhux biss li ftit żgħira ta 'sintassi,

173
00:07:42,860 --> 00:07:45,490
iżda fil-quċċata, I darb'oħra
kellhom din il-linja li

174
00:07:45,490 --> 00:07:49,760
permessi me biex joħolqu xi ħaġa li
qisu programm C imsejjaħ hello,

175
00:07:49,760 --> 00:07:51,150
imsejħa kondizzjonijiet 1.

176
00:07:51,150 --> 00:07:54,520
Imma din mhix 0 u dawk
Jien eżekuzzjoni direttament.

177
00:07:54,520 --> 00:07:57,620
Minflok huwa taħdem din
interpretu li ismu

178
00:07:57,620 --> 00:07:59,440
jiġri li jkun identiku għall-lingwa.

179
00:07:59,440 --> 00:08:04,970
Il-programm huwa msejjaħ PHP, u l-kodiċi tiegħi
taħt il-linja waħda jkun qed jiġi mgħoddi fis dan.

180
00:08:04,970 --> 00:08:07,740
>> Nistgħu nagħmlu ieħor pjuttost sempliċi
Eżempju reminixxenti ta 'xi ħaġa

181
00:08:07,740 --> 00:08:09,240
għamilna ġimgħat ilu.

182
00:08:09,240 --> 00:08:12,020
Għal darb'oħra, dan huwa tip ta '
blokki arbitrarja tal-kodiċi

183
00:08:12,020 --> 00:08:14,000
li apparentement ma
dak meta inti run?

184
00:08:14,000 --> 00:08:15,625
X'hemm dan morna għall-istampa, preżumibbilment?

185
00:08:15,625 --> 00:08:23,540

186
00:08:23,540 --> 00:08:28,250
>> Allura inizjalment fuq il-linja 16, huwa
ser tg x issa huwa ta '2, probabbilment.

187
00:08:28,250 --> 00:08:30,920
% D huwa l-istess bħal $ i għall printf.

188
00:08:30,920 --> 00:08:33,460
Mela allura huwa cubing, dot,
dot, dot, fil-linja 17.

189
00:08:33,460 --> 00:08:36,299
U mbagħad linja 18 jidher
li jsejjaħ il-funzjoni Cubed.

190
00:08:36,299 --> 00:08:37,600
U fejn tkun Cubed definita?

191
00:08:37,600 --> 00:08:40,319
>> Ukoll, jidher qisu fil-linja 25,
b'tali mod li mhux kollha li differenti.

192
00:08:40,319 --> 00:08:42,610
Stajt ltqajna xi kummenti hawn fuq
dan, iżda għall-parti l-kbira,

193
00:08:42,610 --> 00:08:45,370
huwa pjuttost sempliċi
porting jew il-konverżjoni

194
00:08:45,370 --> 00:08:48,470
mill-programm C għall-verżjoni PHP.

195
00:08:48,470 --> 00:08:52,670
Imma issa hemm koppja ta '
differenzi li forsi għandhom jaqbżu out.

196
00:08:52,670 --> 00:08:56,100
X'iktar huwa differenti dwar kif inti
tista 'tikteb dan l-istess programm C?

197
00:08:56,100 --> 00:08:57,900
>> STUDENT: [inaudible].

198
00:08:57,900 --> 00:09:00,070
>> DAVID J. Malan: Hemm
ebda prototip top up.

199
00:09:00,070 --> 00:09:03,210
Allura PHP-- u franchement, a
lott ta 'languages-- moderna

200
00:09:03,210 --> 00:09:06,920
huma ħafna aktar intelliġenti u aktar utli
minn C kompilaturi f'dik inti

201
00:09:06,920 --> 00:09:09,740
tista 'tpoġġi l-funzjoni up here,
inti tista 'tpoġġi funzjoni stabbiliti hawn,

202
00:09:09,740 --> 00:09:12,740
u l-interpretu huwa għaddej
biex tagħmel inti l-favur tal-qari

203
00:09:12,740 --> 00:09:16,010
-fajl sħiħ qabel ma jiddeċidix
li xi funzjoni ma teżistix.

204
00:09:16,010 --> 00:09:17,970
Allura titjib sbieħ snin aktar tard.

205
00:09:17,970 --> 00:09:22,126
Imma hemm ukoll xi ħaġa
inkella differenti jew assenti hawn.

206
00:09:22,126 --> 00:09:22,626
Yeah?

207
00:09:22,626 --> 00:09:25,084
>> STUDENT: [inaudible].

208
00:09:25,084 --> 00:09:27,750
DAVID J. Malan: Aħna ma jkollhom
jiddikjaraw it-tipi ta 'varjabbli,

209
00:09:27,750 --> 00:09:31,780
hekk aħna ser tara qabel twil li
hemm tipi differenti fil PHP,

210
00:09:31,780 --> 00:09:34,970
imma inti m'għandekx bżonn li jispeċifikaw lilhom,
li wkoll hija kemm tajbin u ħżiena.

211
00:09:34,970 --> 00:09:36,623
U hemm waħda nieqsa ħaġa oħra.

212
00:09:36,623 --> 00:09:37,430
>> STUDENT: M'hemm l-ebda libreriji.

213
00:09:37,430 --> 00:09:38,630
>> DAVID J. Malan: M'hemm l-ebda libreriji.

214
00:09:38,630 --> 00:09:39,350
OK, b'tali mod li sbieħ.

215
00:09:39,350 --> 00:09:40,540
Irridu jiksbu ħafna aktar barra mill-kaxxa.

216
00:09:40,540 --> 00:09:43,373
Allura hemm attwalment ħafna aktar
affarijiet milli ħsibt kienu differenti.

217
00:09:43,373 --> 00:09:44,350
Kif dwar il-mod fid-dahar?

218
00:09:44,350 --> 00:09:46,032
X'hemm li?

219
00:09:46,032 --> 00:09:46,740
Jgħidu li darba aktar?

220
00:09:46,740 --> 00:09:47,960
>> STUDENT: Pointer.

221
00:09:47,960 --> 00:09:49,270
>> DAVID J. Malan: Ebda pointers.

222
00:09:49,270 --> 00:09:51,280
OK, għall-inqas f'dan l-eżempju, l-ebda.

223
00:09:51,280 --> 00:09:52,070
C'est ġust.

224
00:09:52,070 --> 00:09:55,090
Allura ma jkunx hemm pointers
fil-PHP attwalment b'mod ġenerali.

225
00:09:55,090 --> 00:09:58,730
Hemm xi ħaġa imsejħa referenzi,
iżda aħna mhux se jqattgħu wisq ħin hemm.

226
00:09:58,730 --> 00:09:59,520
U x'iktar?

227
00:09:59,520 --> 00:10:00,185
>> STUDENT: Main.

228
00:10:00,185 --> 00:10:01,060
DAVID J. Malan: Main.

229
00:10:01,060 --> 00:10:02,768
Allura dan kien il-Biggie
I kienet taħseb ta '.

230
00:10:02,768 --> 00:10:04,660
Avviż hemm l-ebda punt ta 'dħul ewlieni.

231
00:10:04,660 --> 00:10:06,525
Inti sempliċiment tibda tikteb kodiċi tiegħek.

232
00:10:06,525 --> 00:10:08,400
U dan huwa attwalment
se jkun vantaġġuż

233
00:10:08,400 --> 00:10:10,560
meta aħna transizzjoni
mumentarjament li attwalment qed jużaw

234
00:10:10,560 --> 00:10:13,980
dan l-istess lingwa għal web ibbażat-
, ipprogrammar li aħna

235
00:10:13,980 --> 00:10:16,580
ma jridux li jkollhom waħda biss punt ta 'dħul.

236
00:10:16,580 --> 00:10:19,980
Aħna tista 'tixtieq li jkollhom mazz ta'
URLs, mazz ta 'fajls differenti

237
00:10:19,980 --> 00:10:22,930
kollha tieħu fl jintuza mill-utent
u jipproduċi output.

238
00:10:22,930 --> 00:10:27,130
>> Iżda hawnhekk huwa l-diżappuntanti ħafna
eżempju li I wiegħed aħħar darba,

239
00:10:27,130 --> 00:10:30,130
jiġifieri f'dan il-folder
hawn, misspellings.

240
00:10:30,130 --> 00:10:33,680
Allura f'dan il-fajl speller, li aħna
mhux se jqattgħu wisq ħin fuq, hemm

241
00:10:33,680 --> 00:10:37,870
essenzjalment porting-- P-O-R-T.
Huwa biss il-kelma mogħtija meta, ngħidu aħna,

242
00:10:37,870 --> 00:10:40,800
inti jikkonvertu minn lingwa waħda
għall-ieħor manwalment normalment.

243
00:10:40,800 --> 00:10:45,680
>> Din hija portabbiltà ta 'PC
verżjoni ta 'speller minn PSET 5.

244
00:10:45,680 --> 00:10:48,856
U jien essenzjalment ippruvaw jikkonvertu
linja lilha mill-linja mill-qrib kemm nista '.

245
00:10:48,856 --> 00:10:51,730
Mela jekk inti tixtieq dan it-tip ta 'ħaġa,
huwa fil-fatt jiswa f'xi punt

246
00:10:51,730 --> 00:10:54,229
jinġibdu minnhom tnejn up ġenb
ġenb u tara x'inhu l-istess

247
00:10:54,229 --> 00:10:55,230
u x'hemm differenti.

248
00:10:55,230 --> 00:10:57,510
Iżda dawn qed pretty darn simili.

249
00:10:57,510 --> 00:11:00,110
Jekk inti tiftakar dak
speller anke dehru qishom,

250
00:11:00,110 --> 00:11:02,110
anki jekk inti ma
jkollhom jibdlu dan il-fajl,

251
00:11:02,110 --> 00:11:04,860
huwa pjuttost simili
strutturalment biss bi ftit

252
00:11:04,860 --> 00:11:06,200
ta 'bidliet hawn u hemm.

253
00:11:06,200 --> 00:11:10,140
>> Allura dan huwa biss biex jgħidu li huwa pjuttost
sempliċi biex jikkonvertu speller

254
00:11:10,140 --> 00:11:12,000
minn C sa PHP.

255
00:11:12,000 --> 00:11:15,390
Iżda fl-dizzjunarju, hemm
xi ħaġa anke aktar konvinċenti.

256
00:11:15,390 --> 00:11:19,270
Let me imorru quddiem u joħolqu
fajl dictionary.php tiegħi stess.

257
00:11:19,270 --> 00:11:24,010
Hekk ftit differenti f'dak
aħna ser sejħa hija PHP minflok .c.

258
00:11:24,010 --> 00:11:26,980
Minħabba li dan huwa fajl PHP, I
do-- ftit annoyingly-- jkollhom

259
00:11:26,980 --> 00:11:30,132
biex jibdew il-fajl ma
tag PHP bħal dik.

260
00:11:30,132 --> 00:11:32,340
U jien ser jimxi 'l quddiem
u jiddefinixxu ftit funzjonijiet.

261
00:11:32,340 --> 00:11:35,770
Funzjoni imsejħa verifika, li hija
ser tieħu fil-kelma bħal qabel.

262
00:11:35,770 --> 00:11:37,520
Iżda dan l-argument tal-
se jkollhom dollaru

263
00:11:37,520 --> 00:11:39,840
jiffirmaw għaliex aħna qed, għal darb'oħra, bl-użu PHP.

264
00:11:39,840 --> 00:11:42,350
Funzjoni oħra mill-
dictionary.c kienet tagħbija

265
00:11:42,350 --> 00:11:47,120
u hija ħadet fil-isem ta 'dizzjunarju,
so I ser tingħata dik il-funzjoni lesta li tmur.

266
00:11:47,120 --> 00:11:50,920
>> Xulxin dictionary.c kien dak?

267
00:11:50,920 --> 00:11:54,580
Daqs kienet waħda ta 'dawk nicest, fil
inqas jekk inti tinżamm xi varjabbli madwar.

268
00:11:54,580 --> 00:11:57,830
hekk daqs biss għandu jirritorna varjabbli.

269
00:11:57,830 --> 00:11:59,090
U mbagħad kien hemm jħottu.

270
00:11:59,090 --> 00:12:02,830
>> Allura kien hemm dawn l-erba
funzjonijiet problema stabbiliti 5

271
00:12:02,830 --> 00:12:06,770
li inti meħtieġ biex jimplimentaw
xi struttura data jew strutturi.

272
00:12:06,770 --> 00:12:10,170
So I wiegħed li fil
PHP, nistgħu jiddikjaraw

273
00:12:10,170 --> 00:12:14,490
tabella hash, per eżempju,
dak kollu li aktar faċilment.

274
00:12:14,490 --> 00:12:17,377
Fil-fatt, jekk irrid tabella hash,
Jien biss se jmorru bħal dik

275
00:12:17,377 --> 00:12:18,460
u hemm tabella hash tiegħi.

276
00:12:18,460 --> 00:12:21,555
U dak l-nota, diżappuntanti,
li aħna jitħalla 'off fuq aħħar darba.

277
00:12:21,555 --> 00:12:23,930
U inti taf liema, jekk jien ridt
varjabbli għad-daqs, ukoll,

278
00:12:23,930 --> 00:12:25,867
dan wieħed mhux kollha
li differenti minn C,

279
00:12:25,867 --> 00:12:27,450
imma jien ser imorru quddiem u tagħmel dan.

280
00:12:27,450 --> 00:12:28,630
U avviż l-ebda tip ta 'data.

281
00:12:28,630 --> 00:12:31,180
U jien ser imorru lura aktar tard u
attwalment żid xi kummenti hawn.

282
00:12:31,180 --> 00:12:32,480
Imma xi ngħidu dwar tagħbija?

283
00:12:32,480 --> 00:12:35,780
>> Jekk dizzjunarju sinjal dollaru
huwa l-isem tal-fajl tiegħi

284
00:12:35,780 --> 00:12:39,600
u jien fil-fatt tixtieq li tagħbija
kliem fil din it-tabella issa,

285
00:12:39,600 --> 00:12:42,360
I jistgħu attwalment jagħmlu
xi ħaġa pjuttost sempliċi.

286
00:12:42,360 --> 00:12:44,880
One-- u dan huwa minorly
annoying-- fil-PHP,

287
00:12:44,880 --> 00:12:47,710
għandek tispeċifika ġewwa
ta 'funzjoni jekk inti

288
00:12:47,710 --> 00:12:51,060
jridu aċċess xi globali
varjabbli thats definita barra.

289
00:12:51,060 --> 00:12:53,530
>> Iżda li mhux partikolarment
interessanti dritt issa.

290
00:12:53,530 --> 00:12:57,920
X'hemm aktar interessanti hija din għal kull
jibnu dan semmejt aħħar darba.

291
00:12:57,920 --> 00:13:01,880
U jirriżulta li PHP għandu funzjoni
imsejħa fajl li l-iskop fil-ħajja

292
00:13:01,880 --> 00:13:05,550
huwa li tiftaħ fajl u jinqraw
kollha ta 'linji tagħha fi array

293
00:13:05,550 --> 00:13:06,840
u jgħadduhom lura lejn.

294
00:13:06,840 --> 00:13:12,170
>> Li huwa li jgħidu I tista 'tagħmel dizzjunarju hekk
li issa effettivament meta I call fajl,

295
00:13:12,170 --> 00:13:15,472
dan se idejn lili lura
firxa ta 'kliem mill-fajl.

296
00:13:15,472 --> 00:13:16,430
Huwa mhux kollha li tajba.

297
00:13:16,430 --> 00:13:20,130
Huwa għadu għaddej biex tkun linja
ta 'kliem, lineari xi ħaġa.

298
00:13:20,130 --> 00:13:23,880
Imma I tista 'tmur quddiem u jtenni
fuq kull wieħed dawn il-kliem li jużaw

299
00:13:23,880 --> 00:13:25,710
li sintassi rajna fil-qosor aħħar darba.

300
00:13:25,710 --> 00:13:27,940
U tkun taf tara aktar
fil-PSET jmiss.

301
00:13:27,940 --> 00:13:32,070
>> Imma issa għandi mtennija loop
fuq kull kelma fid-dizzjunarju.

302
00:13:32,070 --> 00:13:36,100
U fuq kull iterazzjoni, recall jien
sejħa tal-kelma attwali "kelma."

303
00:13:36,100 --> 00:13:39,790
U dan kollu għaddej biex jieħdu biex
tpoġġi kelma fil-dizzjunarju huwa

304
00:13:39,790 --> 00:13:43,530
ser ikunu raden kelma "vera."

305
00:13:43,530 --> 00:13:44,740
C'est daħħal funzjoni tiegħi.

306
00:13:44,740 --> 00:13:46,661
C'est funzjoni tat-tagħbija tiegħi
għall-dizzjunarju tiegħi.

307
00:13:46,661 --> 00:13:49,410
Issa huwa daqsxejn ta 'iqarrqu għaliex,
inti taf liema, hemm attwalment

308
00:13:49,410 --> 00:13:52,920
backslash n fl-aħħar tal-kliem
li għandi probabbilment jeħles,

309
00:13:52,920 --> 00:13:56,380
iżda li mhux problema minħabba PHP
funzjoni msejħa CHOP li letteralment

310
00:13:56,380 --> 00:13:58,480
chops off karattru wieħed fl-aħħar ħafna.

311
00:13:58,480 --> 00:13:59,400
Allura l-ebda problema hemmhekk.

312
00:13:59,400 --> 00:14:02,199
Imxejna marret quddiem u fil-fatt
jitqassar li għal ftit dan.

313
00:14:02,199 --> 00:14:05,240
U issa I għandhom probabbilment jżommu rekord
ta 'daqs, hekk ejja mill-inqas tagħmel this--

314
00:14:05,240 --> 00:14:05,835
daqs ++.

315
00:14:05,835 --> 00:14:07,339
I tista 'tagħmel dan bħal qabel.

316
00:14:07,339 --> 00:14:10,380
U allura dan huwa probabbilment se
taħdem biss multa, b'tali mod li l-ritorn veru.

317
00:14:10,380 --> 00:14:10,930
Isir.

318
00:14:10,930 --> 00:14:11,797
PSET 5.

319
00:14:11,797 --> 00:14:13,545
>> [Rires]

320
00:14:13,545 --> 00:14:14,420
>> DAVID J. Malan: OK.

321
00:14:14,420 --> 00:14:16,628
Aħna qed tmur biex tagħmel dan mill-ġdid
mal-PSET jmiss, wisq.

322
00:14:16,628 --> 00:14:18,730
Allura dak dwar id-daqs?

323
00:14:18,730 --> 00:14:22,080
Ukoll, dan huwa wieħed nisperaw huwa dwar
kif tista 'tistenna aħħar darba,

324
00:14:22,080 --> 00:14:24,460
għalkemm nagħmel
dan il-ħaġa globali stupid.

325
00:14:24,460 --> 00:14:26,610
Huwa biss artifact minn
disinn tal-lingwa.

326
00:14:26,610 --> 00:14:28,450
>> Iżda ċċekkja huwa xi ftit aktar interessanti.

327
00:14:28,450 --> 00:14:31,420
Mela jekk jien għadda f'dollari
sinjal kelma, I-ewwel

328
00:14:31,420 --> 00:14:34,060
tixtieq li jkollok aċċess għal
dik it-tabella varjabbli globali.

329
00:14:34,060 --> 00:14:36,700
U issa jekk irrid li
jiċċekkjaw jekk kelma ikun hemm,

330
00:14:36,700 --> 00:14:44,350
I tista 'sempliċement jgħidu jekk huwa veru li
dan li ġej huwa stabbilit fit-tabella,

331
00:14:44,350 --> 00:14:49,957
imbagħad imorru quddiem u r-ritorn
vera; inkella, ritorn foloz.

332
00:14:49,957 --> 00:14:51,180
Isir.

333
00:14:51,180 --> 00:14:52,440
Nofs l-ieħor ta 'PSET 5.

334
00:14:52,440 --> 00:14:54,540
>> Kull dritt, hekk darb'oħra, jien
taqta 'kantunieri ftit.

335
00:14:54,540 --> 00:14:56,831
Fl-ġustizzja, I għandhom probabbilment
jonfqu ftit sekondi aktar

336
00:14:56,831 --> 00:14:58,300
fuq din l-implimentazzjoni.

337
00:14:58,300 --> 00:15:01,860
U I probabbilment ma għandhomx mock l-
sigħat inti tpoġġi fuq il-PSET tant.

338
00:15:01,860 --> 00:15:04,045
Allura strtolower hija funzjoni.

339
00:15:04,045 --> 00:15:06,670
Xi ħaġa eżistenzjalist simili
fis-C, għall-inqas għall-karattri,

340
00:15:06,670 --> 00:15:08,560
iżda li PHP ltqajna verżjoni sħiħa string.

341
00:15:08,560 --> 00:15:11,226
>> Li għaddej biex jisfurzaw kollox
li zghar, li xi wħud minnkom

342
00:15:11,226 --> 00:15:14,944
seta 'jsir biex canonicalize liema
inti kienu tqegħid fil tiegħek dizzjunarju.

343
00:15:14,944 --> 00:15:16,360
U issa int tista 'tagħmel dan fis-C, wisq.

344
00:15:16,360 --> 00:15:17,780
Dan m'għandha x'taqsam xejn ma PHP.

345
00:15:17,780 --> 00:15:20,260
>> Iżda kwalunkwe ħin għandek
kundizzjoni Boolean,

346
00:15:20,260 --> 00:15:22,680
bħal xi ħaġa fuq il-linja
10 hemm, li huwa biss

347
00:15:22,680 --> 00:15:27,145
ser tevalwa lil vera jew
falza, u tiegħek jekk inkella b'mod ċar

348
00:15:27,145 --> 00:15:33,620
huwa jirritorna vera jew falza, I jistgħu
sempliċiment verament jagħmlu dan sexier

349
00:15:33,620 --> 00:15:38,360
u biss tagħmel xi ħaġa bħal din.

350
00:15:38,360 --> 00:15:40,500
Allura li hemm funzjoni check tiegħi.

351
00:15:40,500 --> 00:15:42,560
Dritt, jekk il Boolean
jirritorna vera jew falza,

352
00:15:42,560 --> 00:15:44,630
ejja biss jirritorna emblée.

353
00:15:44,630 --> 00:15:47,340
>> U hemm ftit tweaks oħra
I tista 'tagħmel hawn u hemm.

354
00:15:47,340 --> 00:15:51,380
Jħottu Load--, mill-mod, li isir.

355
00:15:51,380 --> 00:15:52,850
X'taqsam xejn hemmhekk.

356
00:15:52,850 --> 00:15:55,840
Peress kollha ta 'l-memorja fil-
PHP u ħafna lingwi oħra

357
00:15:55,840 --> 00:15:57,570
huwa attwalment ġestiti għalik.

358
00:15:57,570 --> 00:16:00,330
Allura billi fis-C, kif
inti stajt tgħallmu bi tbatija,

359
00:16:00,330 --> 00:16:04,700
xejn inti malloc jew calloc jew
realloc, inti għandek yourself ħielsa.

360
00:16:04,700 --> 00:16:08,770
Xi ħaġa li fopen, inti għandek fclose,
sabiex ir-riżorsi huma finalment meħlusa

361
00:16:08,770 --> 00:16:11,690
u għodod simili Valgrind ma
Avviż u ma jilmentaw,

362
00:16:11,690 --> 00:16:13,570
li hija ħaġa tajba li jimxu fuqhom.

363
00:16:13,570 --> 00:16:16,190
>> Iżda żgur, irid ikun hemm
jkun hemm xi qabda, id-dritt?

364
00:16:16,190 --> 00:16:19,400
Inkella, aħna tip ta 'moħli
mazz sħiħ ta 'ġimgħat.

365
00:16:19,400 --> 00:16:23,270
Allura hemm xi numru ta 'raġunijiet
għaliex aħna tip ta 'tieħu din trajettorja,

366
00:16:23,270 --> 00:16:24,440
iżda hemm kompromess.

367
00:16:24,440 --> 00:16:25,820
Dritt, dan kien tematika.

368
00:16:25,820 --> 00:16:29,690
>> Allura dak jista kompromess
hawn jiċċaqalqu, minn C sa PHP?

369
00:16:29,690 --> 00:16:33,250
Jħoss simili kollha jirbaħ s'issa għajr
daqsxejn ta 'kruha hawn jew hemm.

370
00:16:33,250 --> 00:16:34,040
Yeah.

371
00:16:34,040 --> 00:16:34,700
X'hemm li?

372
00:16:34,700 --> 00:16:36,064
>> STUDENT: [inaudible] memorja.

373
00:16:36,064 --> 00:16:36,980
DAVID J. Malan: Veloċità.

374
00:16:36,980 --> 00:16:37,479
OK.

375
00:16:37,479 --> 00:16:40,720
Ukoll, il-veloċità tiegħi kien pretty fast.

376
00:16:40,720 --> 00:16:42,020
Dritt?

377
00:16:42,020 --> 00:16:44,320
Iżda veloċità ta 'esekuzzjoni tal-programm?

378
00:16:44,320 --> 00:16:45,580
OK, b'tali mod li punt ġust.

379
00:16:45,580 --> 00:16:50,930
>> Allura kif jiġri, I bil-quddiem
cued up kemm soluzzjoni jipprova tiegħi, il-wieħed

380
00:16:50,930 --> 00:16:53,510
Kelli fuq il-bord big
kien soluzzjoni bbażata fuq jipprova,

381
00:16:53,510 --> 00:16:55,510
u jien li f'dan id-direttorju hawn.

382
00:16:55,510 --> 00:16:58,510
So I fil-mument, I tista 'tmur quddiem u
run dan fuq il-Bibbja James King,

383
00:16:58,510 --> 00:16:59,657
laqtu Ikteb.

384
00:16:59,657 --> 00:17:01,990
U dan huwa wieħed jittama korretta
implimentazzjoni fl-aħħar,

385
00:17:01,990 --> 00:17:05,109
tagħti me żmien fit-total
ta '0.38 sekondi għal dak

386
00:17:05,109 --> 00:17:07,270
wieħed eżempju kemmxejn arbitrarja.

387
00:17:07,270 --> 00:17:09,270
>> U jekk I issa jmorru fis dan
tieni tieqa terminal

388
00:17:09,270 --> 00:17:14,569
hawn fejn I-ewwel tinfetaħ gedit, let
me go fis code-- lum li, għal darb'oħra,

389
00:17:14,569 --> 00:17:19,650
Huwa f'dan il-direttorju here-- u
let me imorru quddiem u run speller.

390
00:17:19,650 --> 00:17:23,470
Hekk biss tkun ċara,
dan huwa l-verżjoni PHP.

391
00:17:23,470 --> 00:17:25,170
Jien biss turi l-quċċata ta 'dan hawn.

392
00:17:25,170 --> 00:17:32,020
>> Hekk jekk I do speller ta tilde CS50
PSET 5 testi, King James, jidħlu.

393
00:17:32,020 --> 00:17:39,700

394
00:17:39,700 --> 00:17:43,050
Huwa għadu aktar mgħaġġla minn kitba
dan fis-C, iżda l-ħin totali

395
00:17:43,050 --> 00:17:47,650
huwa, avviż, 0.93, billi tiegħi
Implimentazzjoni C bbażati fuq kienet 0.38.

396
00:17:47,650 --> 00:17:49,110
Allura huwa differenza mhux trivjali.

397
00:17:49,110 --> 00:17:51,100
>> U dan huwa biss fuq wieħed fajl.

398
00:17:51,100 --> 00:17:53,480
Jekk ġejt biex imexxu l-tnejn
programmi kontra l-bord big

399
00:17:53,480 --> 00:17:56,510
u jkollhom mazz sħiħ ta 'inputs
ttestjati, dan ċertament żid up.

400
00:17:56,510 --> 00:18:00,310
U jekk kellna settijiet ta 'data anke akbar,
dan, wisq, se jammontaw l-aktar.

401
00:18:00,310 --> 00:18:04,820
Allura iva, tħallas xi prezz
ta 'veloċità huwa tabilħaqq il-każ.

402
00:18:04,820 --> 00:18:05,470
X'iktar?

403
00:18:05,470 --> 00:18:08,000

404
00:18:08,000 --> 00:18:08,860
Yeah?

405
00:18:08,860 --> 00:18:10,340
>> STUDENT: Ammont ta 'użu RAM.

406
00:18:10,340 --> 00:18:11,756
>> DAVID J. Malan: Ammont ta 'użu RAM.

407
00:18:11,756 --> 00:18:15,380
So I ma jagħtu t-tieni wieħed
ħasbu meta tikteb dan PHP

408
00:18:15,380 --> 00:18:17,300
Verżjoni li kemm
memorja I kienet qed tuża.

409
00:18:17,300 --> 00:18:22,080
Jien kompletament tiddifferixxi li biex PHP
innifsu u min kiteb dak il-programm.

410
00:18:22,080 --> 00:18:24,500
U li jista 'jkun OK,
imma jekk I attwalment verament

411
00:18:24,500 --> 00:18:28,420
jimpurtahom tgħasir prestazzjoni kemm
barra mill-programm tiegħi jew barra mill-website tiegħi

412
00:18:28,420 --> 00:18:31,150
jew barra ta 'kwalunkwe għodda
Jien bini, forsi

413
00:18:31,150 --> 00:18:33,310
PHP, tabilħaqq, mhuwiex il-lingwa dritt.

414
00:18:33,310 --> 00:18:36,330
>> U fil-fatt, huwa għalhekk li, għall
eżempju, web servers-- ħafna

415
00:18:36,330 --> 00:18:38,980
il-programmi attwali li
jservu up web content--

416
00:18:38,980 --> 00:18:41,810
mhumiex miktuba fil-PHP
jew fl-Python jew Ruby.

417
00:18:41,810 --> 00:18:44,630
Huma miktuba, bħall-
inti issa ser tagħmel ma PSEt 6,

418
00:18:44,630 --> 00:18:48,120
fis-C sabiex inti tista għafas
kull daqsxejn ta 'prestazzjoni minnha

419
00:18:48,120 --> 00:18:50,780
u verament jeżerċitaw
kontroll fine-grain fuq x'hemm

420
00:18:50,780 --> 00:18:52,980
għaddej minn taħt il-
barnuża u mhux biss teħodha

421
00:18:52,980 --> 00:18:54,890
għall mogħtija xi ogħla
struttura tad-data livell.

422
00:18:54,890 --> 00:18:58,071
>> Ikkunsidra, wara kollox,
min fil-PHP implimentati

423
00:18:58,071 --> 00:19:00,070
dan il-kunċett ta 'hash
table-- huwa attwalment aktar

424
00:19:00,070 --> 00:19:04,260
imsejħa validament array-- assoċjattiv
ma hu jew hi jkollu ebda idea x'tip

425
00:19:04,260 --> 00:19:07,090
ta 'inputs inti ser ikunu
tqegħid fl-istruttura?

426
00:19:07,090 --> 00:19:08,260
Allura ovvjament le, id-dritt?

427
00:19:08,260 --> 00:19:10,340
Huwa għodda ġenerika
fil-toolkit li l-

428
00:19:10,340 --> 00:19:13,430
sakemm għal kull min irid
li jużawh, u għalhekk żgur

429
00:19:13,430 --> 00:19:17,680
ma jistgħux jiġu ottimizzati finalment
għal eżattament dak li inti trid tagħmel.

430
00:19:17,680 --> 00:19:21,180
>> Allura waqt iżvilupp ta 'kummerċ offs-- jista
differenti, prestazzjoni jistgħu jvarjaw,

431
00:19:21,180 --> 00:19:23,120
kumplessità jew l-użu tal-memorja jistgħu jvarjaw.

432
00:19:23,120 --> 00:19:24,820
U hekk dak li inti ser issib
dejjem hija li hemm

433
00:19:24,820 --> 00:19:26,570
se tkun differenti
għodod għall-kummerċ.

434
00:19:26,570 --> 00:19:31,160
U fil-fatt għall-maġġoranza super ta '
proġetti finali tan-nies f'din il-klassi,

435
00:19:31,160 --> 00:19:34,360
jemmnu jew le, C mhux se
li tkun il-lingwa dritt għall-użu.

436
00:19:34,360 --> 00:19:37,880
>> U fil-fatt, wieħed mill-takeaways
finalment xi klassi bħal dan

437
00:19:37,880 --> 00:19:40,510
huwa li inti tikseb taħseb dwar,
ukoll, x'għandek pull off

438
00:19:40,510 --> 00:19:42,710
meta l-ixkaffa trid
biex isolvu xi problema.

439
00:19:42,710 --> 00:19:46,720
U fil-fatt, aħna ser jaqsmu dan il-pont
saħansitra aktar kif aħna nħarsu lejn aktar lingwi

440
00:19:46,720 --> 00:19:47,920
anke lil hinn llum.

441
00:19:47,920 --> 00:19:50,530
>> Mela ejja tranżizzjoni issa biex
forsi kuntest aktar familjari

442
00:19:50,530 --> 00:19:52,480
għall-użu ta 'lingwa bħal PHP.

443
00:19:52,480 --> 00:19:56,720
Huwa kemmxejn komuni li jintużaw fuq
kmand tal-linja, bil-miktub skripts

444
00:19:56,720 --> 00:19:59,050
bħal I ma, imma hija
ħafna, ħafna aktar komuni.

445
00:19:59,050 --> 00:20:02,350
U kien maħsub li jintuża fl
l-forma ta 'fajls li tipikament jispiċċaw

446
00:20:02,350 --> 00:20:05,060
fil .php-- iżda li
mhux prerequisite--

447
00:20:05,060 --> 00:20:07,990
li minnhom infushom jiġġeneraw kontenut tal-web.

448
00:20:07,990 --> 00:20:11,310
>> So let me imorru quddiem u tiftaħ ftit
eżempji I ippreparat bil-quddiem.

449
00:20:11,310 --> 00:20:15,100
U dawn huma attwalment tip ta 'veru
stejjer fil li waħda mill-ewwel affarijiet

450
00:20:15,100 --> 00:20:18,200
Jien qatt ma myself wara irfinar
CS50 u forsi, I think,

451
00:20:18,200 --> 00:20:21,350
Snin CS51 ilu huwa tiegħi
roommate u I kienu jgħinu

452
00:20:21,350 --> 00:20:24,320
biex imexxu l-intramurali freshman
programm sportiv, li, fil-ħin,

453
00:20:24,320 --> 00:20:28,610
kien freshman jirreġistraw għal diversi
isports billi jimla biċċa karta,

454
00:20:28,610 --> 00:20:31,800
bħal ma kienet mitluba, mixi
madwar l-tarzna għal Wigglesworth,

455
00:20:31,800 --> 00:20:34,030
u twaqqa f'xi
qatra bieb Procter tal.

456
00:20:34,030 --> 00:20:37,210
U allura hu jew hi jgħaddu
lilhom u mbagħad fil-fatt email us manwalment

457
00:20:37,210 --> 00:20:39,140
li aħna kienu rreġistrati għal xi sport.

458
00:20:39,140 --> 00:20:41,166
>> Allura ċar, opportunità
għal titjib.

459
00:20:41,166 --> 00:20:44,040
Dawn il-ġranet, inti tista 'ddur lejn biss
Formoli google, iżda lura fil-ġurnata,

460
00:20:44,040 --> 00:20:46,914
kellna fil-fatt jilħqu for-- dan
lanqas ma kienet dik twila ago-- jilħqu

461
00:20:46,914 --> 00:20:49,410
għal programmazzjoni
lingwa li ma kienx PHP.

462
00:20:49,410 --> 00:20:51,200
Fiż-żmien, kien
xi ħaġa imsejħa Perl,

463
00:20:51,200 --> 00:20:52,890
li marret barra ta 'Vogue peress.

464
00:20:52,890 --> 00:20:54,160
Imma l-idea hija l-istess.

465
00:20:54,160 --> 00:20:58,940
>> U jien essenzjalment sib stabbiliti biex jippruvaw
port tmur verżjonijiet Perl biex PHP,

466
00:20:58,940 --> 00:21:03,710
iżda fil caħda ta 'responsabbiltà sħiħa, ma tatx
kwalunkwe maħsub li l-estetika għadha biss.

467
00:21:03,710 --> 00:21:04,960
Allura hawnhekk hija paġna web.

468
00:21:04,960 --> 00:21:05,670
Dan huwa fajl.

469
00:21:05,670 --> 00:21:09,470
Jekk I zoom fi, apparentement tagħha
imsejħa froshim0.php

470
00:21:09,470 --> 00:21:12,060
sempliċiment għaliex dan huwa l-ewwel tagħna
eżempju f'din is-sensiela.

471
00:21:12,060 --> 00:21:15,970
U avviż li hija għandha dak li jidher
bħala forma HTML ikrah ħafna,

472
00:21:15,970 --> 00:21:18,680
iżda formola hija interessanti
għaliex din tippermetti li

473
00:21:18,680 --> 00:21:21,910
lili biex jipprovdu input utent biex l-browser.

474
00:21:21,910 --> 00:21:27,730
>> Issa aħħar darba meta kellna forma, li
min aħna ma jissottomettu parametru tat-talba tagħna,

475
00:21:27,730 --> 00:21:30,450
il-parametru bħal ma kienet mitluba kju?

476
00:21:30,450 --> 00:21:31,330
Allura biex Google, id-dritt?

477
00:21:31,330 --> 00:21:34,090
Aħna totalment punted fuq l-idea ta '
tagħmel xejn ma 'dak input.

478
00:21:34,090 --> 00:21:36,160
>> Imma llum, aħna tibda tipproduċi output.

479
00:21:36,160 --> 00:21:39,420
U l-imġieba jien ser tara
hawnhekk inizjalment huwa pjuttost trivjali.

480
00:21:39,420 --> 00:21:42,980
David, jien ser check off-sess
hawn, jgħidu Matthews hawn.

481
00:21:42,980 --> 00:21:43,800
I mhux se jkun kaptan.

482
00:21:43,800 --> 00:21:45,410
Jien ser ikklikkja Reġistru.

483
00:21:45,410 --> 00:21:50,720
U avviż li l-URL għandu
inbidel għal jirreġistraw 0.php,

484
00:21:50,720 --> 00:21:52,310
u allura hemm dan it-test ikrah hawn.

485
00:21:52,310 --> 00:21:54,460
I taw ebda ħsieb li
l-ifformattjar ta 'dan.

486
00:21:54,460 --> 00:21:59,900
>> Imma dak li hu interessanti hu li tliet
Valuri kienu apparentement mgħoddija fl.

487
00:21:59,900 --> 00:22:02,960
Dan huwa tip PHP ta '
ekwivalenti għal printf--

488
00:22:02,960 --> 00:22:06,330
aħna ser tara dak li verament msejjaħ
fil bit-- li biss prints out

489
00:22:06,330 --> 00:22:08,300
dak li inti għadda fis dan.

490
00:22:08,300 --> 00:22:11,414
Allura dan jissuġġerixxi li din il-forma
kellhom mill-inqas tliet oqsma lilha,

491
00:22:11,414 --> 00:22:12,580
u inti raw lili tip tagħhom fl.

492
00:22:12,580 --> 00:22:15,739
Wieħed kien l-isem tiegħi, wieħed kien
sess, wieħed kien dormitory.

493
00:22:15,739 --> 00:22:18,780
U l-kaptan lanqas jiksbu mibgħuta lill
l-server minħabba I ma check.

494
00:22:18,780 --> 00:22:22,150
>> Allura dan huwa li jgħidu apparentement,
meta inti tissottometti l-affarijiet fuq il-web,

495
00:22:22,150 --> 00:22:26,830
Mhux biss il-URL kultant
change-- kultant ma.

496
00:22:26,830 --> 00:22:30,330
Fil-fatt, l-isem fajl mibdula,
imma dak li hu assenti mill-URL

497
00:22:30,330 --> 00:22:32,861
li aħna ma tara l-aħħar darba ma 'Google.

498
00:22:32,861 --> 00:22:33,360
Yeah?

499
00:22:33,360 --> 00:22:34,380
>> STUDENT: Nru string query

500
00:22:34,380 --> 00:22:35,220
>> DAVID J. Malan: M'hemm l-ebda string query.

501
00:22:35,220 --> 00:22:37,270
M'hemm l-ebda kwistjoni mark xi ħaġa.

502
00:22:37,270 --> 00:22:40,050
M'hemm l-ebda kwistjoni mark q
ugwali qtates, kif għamilna aħħar darba.

503
00:22:40,050 --> 00:22:42,170
U hemm ċertament l-ebda
isem kwistjoni mark ugwali

504
00:22:42,170 --> 00:22:46,310
David jew dorm ugwali Matthews,
dan meta hija li kollha ser?

505
00:22:46,310 --> 00:22:51,290
>> Well, let me jmorru lura għall gedit hawn
u jiftħu l-ewwel ta 'dawn il-fajls

506
00:22:51,290 --> 00:22:57,020
fil vhost tiegħi, ospitanti lokali, pubbliku
direttorju hawn u jmorru fil froshim0.

507
00:22:57,020 --> 00:23:02,060
Għalhekk jirriżulta li kważi
kollha ta 'din il-paġna huwa biss HTML.

508
00:23:02,060 --> 00:23:05,410
U dan jista 'jkun familjari għalik,
iżda malajr se jkun aktar hekk ma PSET 6

509
00:23:05,410 --> 00:23:07,370
u PSET 7 u PSET 8.

510
00:23:07,370 --> 00:23:09,160
Iżda din hija biss paġna HTML.

511
00:23:09,160 --> 00:23:12,400
>> U l-għalf interessanti
jidher li jkun hawn.

512
00:23:12,400 --> 00:23:16,290
A forma tag azzjoni tagħhom attribut
għandu valur ta 'reġistru 0.

513
00:23:16,290 --> 00:23:18,890
C'est pourquoi I meta jissottomettu
dan, din tmur lil dan il-fajl.

514
00:23:18,890 --> 00:23:20,620
Iżda metodu huwa post today-- differenti.

515
00:23:20,620 --> 00:23:23,120
Għalhekk jirriżulta li hemm mill-inqas
żewġ metodi fuq il-web użati

516
00:23:23,120 --> 00:23:24,911
biex jibagħtu informazzjoni
mill-browser għal server.

517
00:23:24,911 --> 00:23:25,980
Get tqiegħdu fil-URL.

518
00:23:25,980 --> 00:23:27,950
Post tqiegħdu x'imkien ieħor.

519
00:23:27,950 --> 00:23:30,570
U meta u għaliex jista inti
fil-fatt tixtieq a website

520
00:23:30,570 --> 00:23:34,110
biex jużaw post allura minflok
ta 'nikseb, biss intuwittivament?

521
00:23:34,110 --> 00:23:37,080
Kwalunkwe websajt.

522
00:23:37,080 --> 00:23:42,010
Liema tip ta 'data għandhom jiġu mgħoddija biss
b'inferenza issa bil-posta kif oppost

523
00:23:42,010 --> 00:23:45,184
biex tikseb, jekk Rajna
iż-żewġ differenzi?

524
00:23:45,184 --> 00:23:46,350
STUDENT: [inaudible] siguri.

525
00:23:46,350 --> 00:23:47,790
DAVID J. Malan: Jekk inti tixtieq
xi ħaġa li tkun sigura.

526
00:23:47,790 --> 00:23:50,360
Allura inti tista 'tittajpja password
ġo website, karta ta 'kreditu

527
00:23:50,360 --> 00:23:53,030
fi websajt kieku
tip ta 'dawn subottimali

528
00:23:53,030 --> 00:23:56,220
jekk il-browser poġġi dik
valur ġewwa tal-URL.

529
00:23:56,220 --> 00:23:57,680
Għaliex?

530
00:23:57,680 --> 00:24:00,059
Tara dan, li ma
jidhru li huma tali big deal,

531
00:24:00,059 --> 00:24:03,350
iżda odds huma inti pretty spiss timxi
bogħod mill-kompjuter jew l-użu tiegħek kompjuter

532
00:24:03,350 --> 00:24:05,310
laboratorji, u għalhekk xi ħadd
ieħor jew anke roommate

533
00:24:05,310 --> 00:24:08,220
jistgħu faċilment jimxu up u ara
dik l-informazzjoni privata.

534
00:24:08,220 --> 00:24:10,220
Meta inti tibgħat email
permezz tal-web, inti probabilment

535
00:24:10,220 --> 00:24:12,350
Ma rridx li jispiċċa data
fil-URL kif ukoll.

536
00:24:12,350 --> 00:24:15,266
U hekk hemm kull numru ta 'raġunijiet
għaliex aħna tista 'tixtieq li tqiegħed lilha hawn.

537
00:24:15,266 --> 00:24:18,610
U d-dritt photos--, I can not anki pjuttost
jimmaġina kif inti tieħu grafika,

538
00:24:18,610 --> 00:24:21,480
bħal JPEG, u poġġih fil-URL.

539
00:24:21,480 --> 00:24:22,330
Inti tista 'tagħmel dan.

540
00:24:22,330 --> 00:24:25,840
Hemm modi ta 'kodifikazzjoni dan, iżda huwa
biss mhux sempliċi bħal dik.

541
00:24:25,840 --> 00:24:29,030
>> Allura jirreġistraw 0 huwa attwalment
underwhelming ħafna.

542
00:24:29,030 --> 00:24:31,610
Kollha jgħid litteralment huwa dan.

543
00:24:31,610 --> 00:24:35,910
Hija prints out ġewwa ta 'xi
HTML tags li ġejjin.

544
00:24:35,910 --> 00:24:38,640
Stajt ltqajna tag PHP hawn
nested ġewwa ta 'tag pre.

545
00:24:38,640 --> 00:24:42,300
"Pre" ifisser biss test pre-formatted,
mono-spazjati, bħal typewriter.

546
00:24:42,300 --> 00:24:44,836
>> Printr hija funzjoni jirrikorri print.

547
00:24:44,836 --> 00:24:46,710
U allura hemm dan
Ħaġa interessanti hawn.

548
00:24:46,710 --> 00:24:48,835
U aħna ser terga 'lura għal din
għaliex hemm oħrajn,

549
00:24:48,835 --> 00:24:51,140
iżda enfasizzati sinjal dollaru
post jidher li

550
00:24:51,140 --> 00:24:56,110
varjabbli fil-PHP li fihom xejn
inti tibgħat mill-browser għal server

551
00:24:56,110 --> 00:24:58,040
gets maħżuna għalik.

552
00:24:58,040 --> 00:25:00,930
U aħna ser tara kif tikseb fuq
dik l-informazzjoni qabel twil.

553
00:25:00,930 --> 00:25:04,000
>> Imma l-ewwel, ejja jmorru lura għall-
eżempju kemmxejn differenti.

554
00:25:04,000 --> 00:25:09,050
Nidħlu register-- jew
pjuttost, froshims1.php,

555
00:25:09,050 --> 00:25:10,470
li jistenna ftit differenti.

556
00:25:10,470 --> 00:25:12,670
I ħa ftit aktar
isforz ma ifformattjar,

557
00:25:12,670 --> 00:25:14,370
anki jekk huwa għadu pjuttost ikrah.

558
00:25:14,370 --> 00:25:16,990
Imma jien ser jimxi 'l quddiem
u tip "David" issa.

559
00:25:16,990 --> 00:25:17,850
Maskili.

560
00:25:17,850 --> 00:25:19,360
Aħna ser jiċċekkja "kaptan" dan iż-żmien.

561
00:25:19,360 --> 00:25:20,660
Aħna ser nagħmlu Matthews.

562
00:25:20,660 --> 00:25:22,430
U jirreġistraw.

563
00:25:22,430 --> 00:25:24,110
>> U din id-darba jgħid, hm, mhux verament.

564
00:25:24,110 --> 00:25:26,180
Kull dritt, hekk dak li tirreġistra 1?

565
00:25:26,180 --> 00:25:30,509
Let me go fis f'reġistru miftuħ 1 hm and--.

566
00:25:30,509 --> 00:25:32,300
Kull dritt, hekk din hija
interessanti, u dan

567
00:25:32,300 --> 00:25:34,880
huwa sies issa lejn
programmi aktar interessanti.

568
00:25:34,880 --> 00:25:38,970
>> Avviż tal-quċċata ta 'dan il-fajl għandu
Tag PHP kif ukoll xi kummenti.

569
00:25:38,970 --> 00:25:42,590
U dawn huma, għal issa, distrazzjoni
Mela ejja biss jeħles dawk il-kummenti

570
00:25:42,590 --> 00:25:47,070
eżatt bħal dawn qed fil C. U jien titlob
ma 'dan il blokki ta' kodiċi bi kumment

571
00:25:47,070 --> 00:25:49,280
li dan il-kodiċi huwa
validazzjoni tal-preżentazzjoni.

572
00:25:49,280 --> 00:25:51,690
>> Ukoll, jirriżulta li
varjazzjonijiet bħall sinjal dollaru

573
00:25:51,690 --> 00:25:53,739
jenfasizzaw post huma
imsejħa globals super.

574
00:25:53,739 --> 00:25:55,530
Huma qed simili dawn
varjabbli globali speċjali

575
00:25:55,530 --> 00:25:58,840
li huma biss omni-preżent
disponibbli fi ħdan il-programm tiegħek.

576
00:25:58,840 --> 00:26:03,870
U tista 'tuża notazzjoni parentesi kwadri
indiċi ġo fihom ma jużaw numri

577
00:26:03,870 --> 00:26:07,460
bħall 0, 1, 2, 3, iżda kliem attwali.

578
00:26:07,460 --> 00:26:12,100
>> Allura inti tista 'taħseb sinjal dollaru
jenfasizzaw post bħala tip ta 'tabella hash

579
00:26:12,100 --> 00:26:15,920
li inti tista 'tgħaddi ewlieni fis, Lookup
kelma fil-bejn il-parentesi kwadri,

580
00:26:15,920 --> 00:26:19,370
u li għaddej biex jagħtuk lura l-
valur li l-utent attwalment ipprovdut.

581
00:26:19,370 --> 00:26:21,210
PHP għandu funzjoni
imsejħa vojta li ftit

582
00:26:21,210 --> 00:26:23,720
jgħid iva jew le, dan
varjabbli hijiex vojta jew le.

583
00:26:23,720 --> 00:26:27,250
Għandna dawn bars doppja,
li ifisser biss jew, bħal fil C.

584
00:26:27,250 --> 00:26:31,740
>> Allura fil-fatt, din il-linja 4 huwa biss
qal jekk l-utent ma tatx isem

585
00:26:31,740 --> 00:26:36,540
jew ma tatx sess jew ma
tagħti dorm, imorru quddiem u jagħtu direzzjoni ġdida lilu

586
00:26:36,540 --> 00:26:38,184
jew lilha permezz ta 'dan linja hawn.

587
00:26:38,184 --> 00:26:40,600
Allura dan huwa ftit cryptic,
iżda dan ifisser biss litteralment

588
00:26:40,600 --> 00:26:43,330
mur lura għall-dan il-post,
għalhekk punts-utent

589
00:26:43,330 --> 00:26:45,420
lura kull fejn hu jew hi daħlet minn.

590
00:26:45,420 --> 00:26:47,880
Imma hija inelegant ftit
f'dak I iebes kodifikati dan.

591
00:26:47,880 --> 00:26:52,150
>> Imma x'jiġri jekk dan jekk il-kundizzjoni
ma tevalwa l vera?

592
00:26:52,150 --> 00:26:55,790
X'jiġri jekk l-utent ma tagħti me tiegħu
jew l-isem tagħha u dorm u s-sess?

593
00:26:55,790 --> 00:26:58,540
Li jekk il-kundizzjoni mhux
ser tevalwa l veru,

594
00:26:58,540 --> 00:27:00,650
so I ma hit l-ħruġ fil-linja 7.

595
00:27:00,650 --> 00:27:01,680
Allura x'jiġri?

596
00:27:01,680 --> 00:27:03,880
U dan huwa dak i
interessanti dwar PHP.

597
00:27:03,880 --> 00:27:07,470
>> Inti tista 'qatra fi u barra
tal-mod PHP, biex ngħidu hekk.

598
00:27:07,470 --> 00:27:10,985
Jekk inti tixtieq xi kodiċi li tesegwixxi,
inti tista 'tiftaħ u tagħlaq tag PHP

599
00:27:10,985 --> 00:27:13,010
u mqiegħda kodiċi hemmhekk bħal I ghamilt hawn.

600
00:27:13,010 --> 00:27:16,810
Hekk kif inti qrib
il-lametta PHP, il-server

601
00:27:16,810 --> 00:27:19,407
huwa biss se bżiq
kwalunkwe inti tpoġġi hemmhekk.

602
00:27:19,407 --> 00:27:21,740
U fil-fatt, dan kien parti mill-
id-disinn oriġinali ta 'PHP,

603
00:27:21,740 --> 00:27:25,280
għal aħjar għall-agħar, kien dan
taħlit flimkien ta 'kodiċi u Markup

604
00:27:25,280 --> 00:27:25,920
lingwa.

605
00:27:25,920 --> 00:27:28,670
U aħna ser tara li dan ħafna
malajr tappartjeni ġo mess.

606
00:27:28,670 --> 00:27:31,280
U hekk aħna ser nagħmlu aħjar minn
Dan fl-aħħar, iżda biss

607
00:27:31,280 --> 00:27:35,620
avviż l-faċilità li biha jien
verament kapaċi li tesegwixxi xi loġika.

608
00:27:35,620 --> 00:27:37,440
>> Iżda għadu daqsxejn underwhelming.

609
00:27:37,440 --> 00:27:41,210
Ejja jiftħu verżjoni
tnejn mill IMs Frosh, li

610
00:27:41,210 --> 00:27:44,270
apparentement jissottometti lill register2.php.

611
00:27:44,270 --> 00:27:47,600
Allura dan il-fajl attwalment għaddejjin
tfittex kważi l-istess.

612
00:27:47,600 --> 00:27:50,780
Jien se jmorru biex Frosh IMs 2.

613
00:27:50,780 --> 00:27:53,050
Iżda fil Frosh IMs 2,
ejja ara dak li jiġri.

614
00:27:53,050 --> 00:27:58,110
>> David, ikklikkja l-buttuna tar-radju, kif
huwa msejjaħ; Matthews, ebda kaptan.

615
00:27:58,110 --> 00:27:59,230
Reġistru.

616
00:27:59,230 --> 00:28:00,130
Inti huma reġistrati.

617
00:28:00,130 --> 00:28:00,700
Mhux tassew.

618
00:28:00,700 --> 00:28:02,574
Oh stenna, aħna biss għamlet
li eżempju, ma we?

619
00:28:02,574 --> 00:28:04,520
Kull dritt, stand by.

620
00:28:04,520 --> 00:28:06,602
Aħna ser nagħmlu l-tlieta.

621
00:28:06,602 --> 00:28:08,560
Ovvjament xi ħaġa huwa madwar
jseħħ bil Gmail.

622
00:28:08,560 --> 00:28:09,600
Aħna ser naslu s'hemm.

623
00:28:09,600 --> 00:28:11,900
>> Allura Frosh IMs 3 tidher bħal dan.

624
00:28:11,900 --> 00:28:13,050
Ebda differenti.

625
00:28:13,050 --> 00:28:19,850
Imma meta I do David, raġel, Matthews, u
jirreġistraw, din it-tielet u l-aħħar verżjoni

626
00:28:19,850 --> 00:28:22,230
pretensjonijiet, pjuttost sempliċi, inti
huma rreġistrati verament.

627
00:28:22,230 --> 00:28:23,560
C'est tip ta immaterjali.

628
00:28:23,560 --> 00:28:25,600
Imma nitlob ma 'dan
tielet u laħħar verżjoni

629
00:28:25,600 --> 00:28:30,610
I issa recreated eżattament dak tiegħi
roommate u I mibnija għall-IMs Frosh

630
00:28:30,610 --> 00:28:31,731
snin tal-programm ilu.

631
00:28:31,731 --> 00:28:32,480
U kien sempliċi.

632
00:28:32,480 --> 00:28:34,330
Ma kien hemm ebda database,
ebda spreadsheet Excel.

633
00:28:34,330 --> 00:28:36,450
Iżda aktar importanti,
ma kien hemm l-ebda karta aktar

634
00:28:36,450 --> 00:28:42,520
għaliex dak li għamilna ma 'dan il-programm
kien li fil-fatt email Procter, li

635
00:28:42,520 --> 00:28:44,530
kien jirċievi qabel
dawn l-affarijiet permezz ta 'forom.

636
00:28:44,530 --> 00:28:48,890
>> U apparentement konna programmati dan
b'tali mod li meta xi ħadd reġistri,

637
00:28:48,890 --> 00:28:52,470
Kont emails john Harvard tal-
proctor-- jew ruħu f'dan il-każ,

638
00:28:52,470 --> 00:28:55,960
John Harvard-- li ġej
text-- "Din il-persuna biss reġistrata."

639
00:28:55,960 --> 00:29:00,560
Isem huwa David, kaptan huwa vojt;
sess, maskili; u dorm, Matthews.

640
00:29:00,560 --> 00:29:01,560
>> Allura dak li ġara hemmhekk?

641
00:29:01,560 --> 00:29:05,360
Ukoll, il-fajl in kwistjoni hawnhekk
hija apparentement register3.php.

642
00:29:05,360 --> 00:29:09,080
U jekk I miftuħa dan, tkun taf tara
kemm il-qawwa ta 'kodiċi bħal dan

643
00:29:09,080 --> 00:29:12,380
u wkoll, franchement, il-insigurtà
ta 'sistema bħall-email.

644
00:29:12,380 --> 00:29:16,290
I għadek effettiv preti li
jkun John Harvard fil-mod li ġej.

645
00:29:16,290 --> 00:29:20,920
>> Għandi l-tikketta PHP miftuħ top up, li
biss jgħid hawnhekk jidħol xi kodiċi PHP.

646
00:29:20,920 --> 00:29:23,155
Down hawn, dawriet hemmhekk
huma libreriji PHP.

647
00:29:23,155 --> 00:29:26,410
Inti biss ma għandekx bżonn li
jinkludu fajls header kemm.

648
00:29:26,410 --> 00:29:28,900
Ikollok aktar mal-
sink tal-kċina, biex ngħidu hekk.

649
00:29:28,900 --> 00:29:31,820
>> Iżda dan iż-żmien fil-linja 4, I do
tixtieq li librerija speċjali msejħa

650
00:29:31,820 --> 00:29:36,087
Mailer PHP, li hija xi ħaġa li għandek
jistgħu jinstallaw b'xejn f'ħafna sistemi.

651
00:29:36,087 --> 00:29:37,920
Down hawn jien validazzjoni
il-preżentazzjoni biss

652
00:29:37,920 --> 00:29:40,540
billi tiċċekkja ma jagħti lill-utent
me isem, l-ġeneru, u dorm.

653
00:29:40,540 --> 00:29:44,130
U jekk iva, imorru quddiem u
instantiate mailer.

654
00:29:44,130 --> 00:29:47,020
>> Inti tista 'taħseb dan bħala
linja tal-kodiċi li ftit jalloka.

655
00:29:47,020 --> 00:29:48,950
Huwa simili malloc, iżda
huwa sexier ftit

656
00:29:48,950 --> 00:29:51,790
f'dak inti ssemmi mhux biss
malloc u xi numru ġeneriċi.

657
00:29:51,790 --> 00:29:55,030
You say tagħti me waħda minn dawn,
tagħti me waħda ġdida ta 'dawn.

658
00:29:55,030 --> 00:29:57,950
>> U jekk inti stajt programmati
Java jew C ++ jew lingwi oħra,

659
00:29:57,950 --> 00:29:59,130
inti tista raw dan.

660
00:29:59,130 --> 00:30:01,840
Iżda l-qasir ta 'dan, jekk
familjari, din il-linja

661
00:30:01,840 --> 00:30:05,410
jqiegħed fis mail sinjal dollaru
a Struct speċjali msejħa

662
00:30:05,410 --> 00:30:08,731
oġġett li jkun built-in
funzjonalità email.

663
00:30:08,731 --> 00:30:10,355
U fil-fatt, avviż u s-sintassi simili.

664
00:30:10,355 --> 00:30:11,900
>> Din mhix pointer, per se.

665
00:30:11,900 --> 00:30:13,990
PHP biss tuża l-istess sintassi.

666
00:30:13,990 --> 00:30:17,660
Din il-linja huwa qal użu
SMTP-- Trasferiment Sempliċi Mail

667
00:30:17,660 --> 00:30:20,900
Protokoll, li huwa biss l-
protokoll użat biex tibgħat posta.

668
00:30:20,900 --> 00:30:24,240
Dan huwa jispeċifikaw użu
Server SMTP Harvard, li

669
00:30:24,240 --> 00:30:25,830
huwa x'imkien hawn fuq il-kampus.

670
00:30:25,830 --> 00:30:28,480
>> Dan huwa qal dak TCP
port numru biex jitkellem,

671
00:30:28,480 --> 00:30:31,650
u I biss dehret li minn
googling jew billi jitolbu lill help desk.

672
00:30:31,650 --> 00:30:34,640
U mbagħad minħabba Harvard xi użi
sigurtà tas-sistema fuq il-server-- posta

673
00:30:34,640 --> 00:30:37,060
inqas għall-kriptaġġ
traffiku bejnek u,

674
00:30:37,060 --> 00:30:41,380
anki jekk xi ħadd jista 'jibgħat lill it--
Jien ser jduru fuq il-protokoll TLS

675
00:30:41,380 --> 00:30:42,710
għaż-żamma dan sigur.

676
00:30:42,710 --> 00:30:44,730
>> Iżda din hija fejn l-affarijiet
jiksbu ftit scary.

677
00:30:44,730 --> 00:30:47,970
I tista 'sempliċement arbitrarju
ngħid li jien jharvard,

678
00:30:47,970 --> 00:30:51,930
u I tista 'sempliċement arbitrarju
email myself hawn.

679
00:30:51,930 --> 00:30:55,650
U allura nista 'tispeċifika
suġġett ma 'din il-linja hawn.

680
00:30:55,650 --> 00:30:58,460
>> U dan biss jistenna ikrah, imma hija
biss mazz ta 'konkatenazzjoni.

681
00:30:58,460 --> 00:31:04,480
Jinstabx PHP simbolu super utli,
bħal xi lingwi, l-operatur dot,

682
00:31:04,480 --> 00:31:07,340
li ftit litteralment concatenates
string wara string wara string,

683
00:31:07,340 --> 00:31:09,810
u inti ma għandekx malloc jew figura
out-tul totali tas-sekwenza.

684
00:31:09,810 --> 00:31:10,820
Inti biss tagħmel dan.

685
00:31:10,820 --> 00:31:15,220
U fil-fatt, għaliex jien concatenating
fil kollha ta 'dawn l-affarijiet ma' dawn tikek,

686
00:31:15,220 --> 00:31:18,330
hu għalhekk li l-email I
mibgħuta ħares kif għamlet.

687
00:31:18,330 --> 00:31:20,610
>> U mbagħad fl-aħħar hawn, jien tibgħat posta.

688
00:31:20,610 --> 00:31:22,580
Hekk jekk dan huwa falz,
Jien biss ser die,

689
00:31:22,580 --> 00:31:25,680
li huwa funzjoni li biss prints
għall-iskrin xi messaġġ ta 'żball.

690
00:31:25,680 --> 00:31:29,170
Iżda huwa, fil-fatt,
ssejjaħ il-funzjoni jibgħat.

691
00:31:29,170 --> 00:31:31,780
Inkella, jekk dan kollu jonqos,
redirects me lura hawn.

692
00:31:31,780 --> 00:31:34,050
>> U għaliex ma nara li
Jien reġistrati tassew?

693
00:31:34,050 --> 00:31:36,110
Ukoll, dan ġara dritt hawn.

694
00:31:36,110 --> 00:31:38,170
So I iġibu dan up għal
ftit ta 'raġunijiet.

695
00:31:38,170 --> 00:31:41,542
>> Wieħed, dan huwa eżattament kif jekk inti tibni
xi websajt għal proġett finali

696
00:31:41,542 --> 00:31:44,000
jew għad-dinja reali, dan huwa
kif inti tibgħat tfakkiriet email

697
00:31:44,000 --> 00:31:45,924
lill-klijenti tiegħek jew abbonati tiegħek.

698
00:31:45,924 --> 00:31:47,590
Din hija kif inti tibgħat tfakkiriet password.

699
00:31:47,590 --> 00:31:50,760
Din hija kif inti tibgħat messaġġi nies
li dawn ikollhom Facebook ġdida

700
00:31:50,760 --> 00:31:52,990
messaġġ pendenti jew xi ħaġa bħal dik.

701
00:31:52,990 --> 00:31:55,010
>> Iżda huwa wkoll titkellem biex
il-fatt li dan jista '

702
00:31:55,010 --> 00:31:58,160
ġew ukoll ħafna minn
Davin jew xi ħadd ieħor.

703
00:31:58,160 --> 00:32:00,567
U jien ngħid dan it-tip ta '
bi tbissima għaliex jien

704
00:32:00,567 --> 00:32:03,400
pjuttost ċert x'inhu għaddej permezz
diversi imħuħ tiegħek f'dan il-punt.

705
00:32:03,400 --> 00:32:11,910
Iżda dan huwa wieħed minn dawk jagħmlu bħala I
jgħidu, mhux bħala I do tip ta 'affarijiet,

706
00:32:11,910 --> 00:32:14,480
minħabba li huwa wieħed trivjali
ssawwar emails bħal dan.

707
00:32:14,480 --> 00:32:16,480
Imma kif inti tista raw
jew taqra fil-Crimson,

708
00:32:16,480 --> 00:32:18,271
ta tard huwa wkoll pretty
trivjali għal nies

709
00:32:18,271 --> 00:32:20,050
li jintraċċaw lura għal xi oriġini.

710
00:32:20,050 --> 00:32:23,790
U jistaqsu lili xi żmien, forsi
waqt l-ikla CS50, kif I ewwel

711
00:32:23,790 --> 00:32:27,080
ltqajna familjari mill-qrib ħafna
kważi l-bord ed ħafna snin

712
00:32:27,080 --> 00:32:30,890
ilu meta skoprejt
kif l-internet maħduma.

713
00:32:30,890 --> 00:32:36,940
Allura fi kwalunkwe case-- ftit
wara l-bord ed għamlet.

714
00:32:36,940 --> 00:32:42,300
>> Allura fi kwalunkwe każ, ikun hemm
mazz sħiħ ta 'globals super,

715
00:32:42,300 --> 00:32:45,960
kif dawn qed jissejjaħ hawn, li waħda minnhom
aħna saw-- dollaru jenfasizzaw sinjal post.

716
00:32:45,960 --> 00:32:49,530
Hemm kontroparti imsejjaħ get,
li huwa fejn Jittieħed mill URL

717
00:32:49,530 --> 00:32:50,690
jispiċċa għaddejjin.

718
00:32:50,690 --> 00:32:54,051
U hemm mazz sħiħ ta 'oħrajn,
sessjoni too-- u server u cookie.

719
00:32:54,051 --> 00:32:55,800
Aħna ser jiġu lura
cookie xi żmien ieħor,

720
00:32:55,800 --> 00:33:01,340
iżda sessjoni huwa tip ta 'kessaħ
minħabba dritt now-- sal now--

721
00:33:01,340 --> 00:33:06,350
kollox aħna ghamilt ma 'web browser
huwa tip ta 'mingħajr stat, biex ngħidu hekk.

722
00:33:06,350 --> 00:33:10,060
I jistgħu ikklikkja madwar, aċċess
fajls fuq is-server, xi ħaġa

723
00:33:10,060 --> 00:33:13,500
jiġri fuq l-iskrin, iżda
allura l-konnessjoni jagħlaq.

724
00:33:13,500 --> 00:33:17,450
L Explorer Internet jew il-
Icon Firefox waqfiet għażil

725
00:33:17,450 --> 00:33:20,340
u inti biss tara dak
dik il-paġna web fiha.

726
00:33:20,340 --> 00:33:23,530
>> Allura HTTP hija mingħajr Stat f'dik
ladarba jagħmel konnessjoni,

727
00:33:23,530 --> 00:33:25,050
gets xi data, thats it.

728
00:33:25,050 --> 00:33:29,940
Ebda konnessjoni aktar, b'differenza Skype,
b'differenza FaceTime, GChat b'differenza, li

729
00:33:29,940 --> 00:33:32,180
żżomm kostanti
konnessjoni mal-server.

730
00:33:32,180 --> 00:33:34,650
Il-web huwa fundamentalment
skonnettjata, għalkemm aħna ser

731
00:33:34,650 --> 00:33:36,630
tara qabel twil kif
nistgħu jissimulaw affarijiet

732
00:33:36,630 --> 00:33:39,300
bħal Facebook chat u GChat,
li jżommu l-illusion--

733
00:33:39,300 --> 00:33:41,680
jew fil-fatt jagħmlu jżommu
konnessjoni kostanti użu

734
00:33:41,680 --> 00:33:43,270
aktar teknoloġija moderna.

735
00:33:43,270 --> 00:33:49,000
>> Imma jekk immur, jgħidu, counter.php,
dan huwa eżempju ieħor sempliċi,

736
00:33:49,000 --> 00:33:52,700
kif aħna ser tara, li bħalissa jaħseb
I żar is-sit ħin żero.

737
00:33:52,700 --> 00:33:56,790
Imma jekk I sempliċiment rikarigu-paġna,
qualche jaf I kien hawn qabel.

738
00:33:56,790 --> 00:33:58,840
Jekk I rikarigu darb'oħra, dan
jaf I kien hawn qabel.

739
00:33:58,840 --> 00:34:01,100
U għal darb'oħra u għal darb'oħra u għal darb'oħra u għal darb'oħra.

740
00:34:01,100 --> 00:34:03,610
>> Allura hemm xi plus-plussing
għaddejjin, iżda avviż

741
00:34:03,610 --> 00:34:07,090
il-ħaġa ftit spins dejjem hekk
qosor top up u mbagħad disconnects,

742
00:34:07,090 --> 00:34:11,179
hekk mhuwiex simili I jkollhom kostanti
konnessjoni mal appliance tiegħi.

743
00:34:11,179 --> 00:34:16,929
Ukoll, jekk I tmur fis counter.php,
avviż kif huwa sempliċi.

744
00:34:16,929 --> 00:34:19,080
I l-ewwel sejħa dan speċjali
funzjoni li aħna ser dalwaqt

745
00:34:19,080 --> 00:34:21,513
tibda tieħu għall mogħtija
imsejħa sessjoni bidu.

746
00:34:21,513 --> 00:34:22,179
Ibda sessjoni.

747
00:34:22,179 --> 00:34:25,095
>> U sessjoni issa huwa biss
se tkun barmil, bħal shopping

748
00:34:25,095 --> 00:34:28,120
cart fejn inti tista 'tpoġġi l-valuri
u tip ta 'fiduċja bħala programmer

749
00:34:28,120 --> 00:34:31,590
li dawn qed tmur biex jkun hawn meta
dak l-utent jiġi back-- tieni

750
00:34:31,590 --> 00:34:35,670
aktar tard, siegħa tard, anki sena wara,
sakemm hu jew hi ma tkunx ċara

751
00:34:35,670 --> 00:34:37,602
cookies tagħhom, kif aħna ser eventwalment tara.

752
00:34:37,602 --> 00:34:39,310
U issa I biss għandhom
IF kundizzjoni hawn.

753
00:34:39,310 --> 00:34:44,679
Mela jekk iċ-ċavetta ta 'wara,
imsejħa counter, huwa stabbilit ġewwa

754
00:34:44,679 --> 00:34:49,210
ta 'dan super global-- dan hash
tabella, jekk inti will-- imsejħa sessjoni,

755
00:34:49,210 --> 00:34:53,350
imbagħad imorru quddiem u grab-
valur mill-think session--

756
00:34:53,350 --> 00:34:55,250
ta 'dan bħala shopping
cart-- u jaħżnu

757
00:34:55,250 --> 00:34:57,680
fil-varjabbli temporanju msejjaħ counter.

758
00:34:57,680 --> 00:35:02,240
>> Inkella, jekk dak kontro-valur kien
mhux stabbiliti fl-hekk imsejħa shopping cart,

759
00:35:02,240 --> 00:35:04,430
biss initialize dan għal 0.

760
00:35:04,430 --> 00:35:09,830
Fl-aħħar nett, stabbiliti hawn, mur u li jqiegħdu lura
fil-carts shopping jew s-sessjoni

761
00:35:09,830 --> 00:35:13,000
il-valur ta 'counter +1.

762
00:35:13,000 --> 00:35:16,730
Għalhekk jirriżulta li dan
here-- kontenitur speċjali

763
00:35:16,730 --> 00:35:20,355
li, għal darb'oħra, hija waħda minn dawn assoċjat
arrays, firxa li inti tista indiċi

764
00:35:20,355 --> 00:35:25,010
fis-kliem minflok numbers--
tippersisti anki wara l-utent tmur bogħod.

765
00:35:25,010 --> 00:35:26,510
Għal darb'oħra, I ser imorru lura għall-paġna issa.

766
00:35:26,510 --> 00:35:28,400
Huwa kien minuta jew hekk.

767
00:35:28,400 --> 00:35:31,300
Iżda huwa jiftakar li stajt
kien hawn 19 darbiet qabel.

768
00:35:31,300 --> 00:35:32,740
Dan huwa żjara 20. tiegħi.

769
00:35:32,740 --> 00:35:36,560
>> U għalhekk dan se jkun kruċjali għas-
implimentazzjoni ta 'kwalunkwe websajt li jiftakar

770
00:35:36,560 --> 00:35:40,640
li int illoggjat, li inti tpoġġi
xi ħaġa litterali fil shopping cart tiegħek

771
00:35:40,640 --> 00:35:43,902
li jixtru jew li għandek xi
numru ta 'messaġġi pendenti.

772
00:35:43,902 --> 00:35:45,610
Ghaċ tixtieq
ftakar informazzjoni,

773
00:35:45,610 --> 00:35:48,130
aħna ser tara li PHP, bħal
f'diversi lingwi oħra,

774
00:35:48,130 --> 00:35:53,640
tagħtina din illużjoni ta 'stat
anki jekk, kif tkun taf tara fil PSET 6,

775
00:35:53,640 --> 00:35:57,642
kif int tagħmel talbiet HTTP
mill-klijent għal server, thats it.

776
00:35:57,642 --> 00:35:59,850
Ladarba inti tikseb lura li
rispons, hemm xejn aktar

777
00:35:59,850 --> 00:36:01,790
ġejjin lura mis-server awtomatikament.

778
00:36:01,790 --> 00:36:03,820
Iżda aħna ser tara kif taħdem madwar dik.

779
00:36:03,820 --> 00:36:07,430
>> Ukoll issa, ejja jippruvaw
tnaddaf dan up ftit.

780
00:36:07,430 --> 00:36:09,470
Rajna ftit
eżempji differenti hemmhekk.

781
00:36:09,470 --> 00:36:12,250
Oh, u bħala twarrib, għall-
dawk familjari jew familjari,

782
00:36:12,250 --> 00:36:14,230
r-raġuni li l-
Eżempju Frosh IMs marru

783
00:36:14,230 --> 00:36:18,060
minn tfittex verament
ikrah li slightly-- sew,

784
00:36:18,060 --> 00:36:23,160
xorta ugly-- għal kemmxejn
inqas ikrah għalkemm għadu ikrah

785
00:36:23,160 --> 00:36:25,230
huwa minħabba li jekk inħarsu
fil-kodiċi tas-sors hawnhekk,

786
00:36:25,230 --> 00:36:28,240
jirriżulta li għandi din
fuq nett tal-fajl.

787
00:36:28,240 --> 00:36:32,570
>> Jirriżulta li bootstrap hija waħda mill-ħafna
libreriji liberament disponibbli hemmhekk

788
00:36:32,570 --> 00:36:37,140
li jeżistu mhux għal lingwi ta 'programmar
dejjem, iżda għal CSS jew għal JavaScript

789
00:36:37,140 --> 00:36:39,190
jew HTML jew kwalunkwe numru ta 'lingwi.

790
00:36:39,190 --> 00:36:42,160
>> U dawn folks here--
oriġinarjament ħareġ

791
00:36:42,160 --> 00:36:44,730
ta Twitter-- biss ikollhom
mazz sħiħ ta 'stili.

792
00:36:44,730 --> 00:36:47,360
Huwa fajl enormi
hawnhekk li xi ħadd kiteb,

793
00:36:47,360 --> 00:36:51,020
jew xi ħadd kiteb, matul iż-żmien li
jispeċifika kuluri u l-ifformattjar

794
00:36:51,020 --> 00:36:53,740
u whatnot hekk li nista '
tip ta 'jissellef sintassi tagħhom

795
00:36:53,740 --> 00:36:56,157
u li ma jkollhom biex insemmu
kif jistabbilixxu l-forma tiegħi.

796
00:36:56,157 --> 00:36:57,990
Dan huwa wkoll minified
hekk li l-kompjuter jista '

797
00:36:57,990 --> 00:37:00,560
jifhimha imma mhux
neċessarjament bniedem.

798
00:37:00,560 --> 00:37:03,050
Allura dan huwa biss għaliex l-
stylization hemm inbidlu.

799
00:37:03,050 --> 00:37:05,450
>> Imma ejja issa jagħmel aħjar
f'termini ta 'disinn,

800
00:37:05,450 --> 00:37:07,490
għaliex jekk aħna nibqgħu isfel
din it-triq twil wisq,

801
00:37:07,490 --> 00:37:11,290
kodiċi tagħna għaddej biex
jiksbu messy u Messier.

802
00:37:11,290 --> 00:37:13,040
Mela ejja tiffoka fuq dawn l-eżempji hawn.

803
00:37:13,040 --> 00:37:15,090
L-aħħar għal-lum.

804
00:37:15,090 --> 00:37:18,720
>> Allura hawnhekk huwa super sempliċi
Verżjoni 1.0 tal-websajt CS50 tal.

805
00:37:18,720 --> 00:37:21,250
Hija biss għandha links għall
lectures u sillabu,

806
00:37:21,250 --> 00:37:25,490
u huwa tuża dik il-lista unordered
tag---tikketta UL li aħna użati aħħar darba.

807
00:37:25,490 --> 00:37:28,800
U jekk fil-fatt, jekk I
jiftħu View Page Sors,

808
00:37:28,800 --> 00:37:31,710
tkun taf tara li dan huwa
tassew, tassew sempliċi HTML.

809
00:37:31,710 --> 00:37:35,460
U fil-fatt, anke jekk din hija
fajl PHP taħt il-barnuża,

810
00:37:35,460 --> 00:37:38,620
huwa għadu biss tobżoq
out HTML biss għal issa.

811
00:37:38,620 --> 00:37:41,312
>> Hekk jekk I ikklikkja fuq Lectures,
naraw dan iseħħ.

812
00:37:41,312 --> 00:37:43,020
U jekk I ikklikkja fuq ġimgħa
żero, naraw dan.

813
00:37:43,020 --> 00:37:44,920
U jekk I ikklikkja fuq
L-Erbgħa, naraw dan.

814
00:37:44,920 --> 00:37:47,900
U dan apparentement kienet il-PDF
tal-pjastri mill dik il-ġurnata.

815
00:37:47,900 --> 00:37:52,020
All I ghamilt hija rabta ma '
ankra tag għal dan il-URL hawn.

816
00:37:52,020 --> 00:37:55,400
>> Allura dan huwa biss li jgħidu li dan huwa pretty
Verżjoni sempliċi ta 'website CS50 tal.

817
00:37:55,400 --> 00:37:56,790
Ejja naraw kif dan jiġi implimentat.

818
00:37:56,790 --> 00:38:01,240
Jekk I tmur fil-direttorju mvc0,
Ser naraw fajls ftit.

819
00:38:01,240 --> 00:38:03,250
Wieħed huwa README, hekk jekk
xi wħud minn dan huwa wisq malajr,

820
00:38:03,250 --> 00:38:05,166
inti tista 'biss poke madwar
aktar komda aktar tard.

821
00:38:05,166 --> 00:38:07,930
U avviż fil hawn huwa fajl index.php.

822
00:38:07,930 --> 00:38:09,960
Jirriżulta li jekk
inti stess, il-bniedem,

823
00:38:09,960 --> 00:38:14,460
ma jispeċifikawx isem finali
URL, il-web server normalment

824
00:38:14,460 --> 00:38:17,010
tiddeduċi xi isem default għalik.

825
00:38:17,010 --> 00:38:20,060
Indiċi dot xi ħaġa
hija ġeneralment l-inadempjenza.

826
00:38:20,060 --> 00:38:23,010
>> B'tali mod li għalhekk mument ilu
meta żort dan il-URL hawn,

827
00:38:23,010 --> 00:38:26,750
ebda isem fajl, ebda fajl
estensjoni, l-ebda perjodu fil-URL.

828
00:38:26,750 --> 00:38:29,710
Hija biss kienu jafu b'xi magically
biex tfittex index.php.

829
00:38:29,710 --> 00:38:30,870
Huwa biss konvenzjoni.

830
00:38:30,870 --> 00:38:32,360
Jista 'jissejjaħ xejn.

831
00:38:32,360 --> 00:38:35,110
>> Hekk jekk I issa mur fis
index.php, tkun taf tara

832
00:38:35,110 --> 00:38:37,100
li, indeed-- ejja
jeħles mill-kummenti

833
00:38:37,100 --> 00:38:39,500
hawnhekk għaliex hemm verament
xejn interessanti li it--

834
00:38:39,500 --> 00:38:41,579
dan huwa biss diffiċli kodifikati HTML.

835
00:38:41,579 --> 00:38:43,370
Allura dak konsistenti,
għalkemm, mat-talba tiegħi

836
00:38:43,370 --> 00:38:45,230
li inti tista jħalltux flimkien HTML u PHP.

837
00:38:45,230 --> 00:38:48,060
M'hemm l-ebda attwali
programmazzjoni loġika fil hawn.

838
00:38:48,060 --> 00:38:51,030
>> U l-fajls l-oħra huma pjuttost
ħafna biss bħala uninteresting.

839
00:38:51,030 --> 00:38:56,240
Huwa biss ġimgħa hard-kodifikati
hawn għal ġimgħa waħda mu ġimgħa waħda w,

840
00:38:56,240 --> 00:38:57,510
għal It-tnejn u l-Erbgħa.

841
00:38:57,510 --> 00:39:01,890
U mbagħad jekk I jiftħu żero ġimgħa,
Avviż huwa kważi identiku.

842
00:39:01,890 --> 00:39:03,320
>> U li tip ta 'takeaway ċavetta.

843
00:39:03,320 --> 00:39:06,180
Avviż kemm żejda dan huwa.

844
00:39:06,180 --> 00:39:10,710
Dawn il-fajls bilkemm bidla, u għadhom I
jinġibed waħda minn dawn kopja / paste-impjiegi

845
00:39:10,710 --> 00:39:13,420
fejn I ħa file-- wieħed preżumibbilment
fil-ġimgħa zero-- kkupjata

846
00:39:13,420 --> 00:39:16,320
meta ġimgħa daħal madwar,
u tweaked Valuri ftit.

847
00:39:16,320 --> 00:39:18,590
Aħna probabbilment għandhom ikunu jistgħu
biex jagħmlu aħjar minn dan.

848
00:39:18,590 --> 00:39:21,800
>> Mela ejja jmorru lura sa MVC
u jmorru fil-verżjoni waħda.

849
00:39:21,800 --> 00:39:24,810
U avviż stajt ltqajna
fajls ftit, għaliex dak

850
00:39:24,810 --> 00:39:29,870
kien komuni għal kollha ta 'dawk il-fajls biss
mument ago-- jekk immur lura għall-verżjoni 0,

851
00:39:29,870 --> 00:39:32,600
ejja jmorru lura fis indiċi,
u biss postulate--

852
00:39:32,600 --> 00:39:36,090
ladarba I jeħles mill-comments--
liema parti tal din il-paġna

853
00:39:36,090 --> 00:39:40,072
huwa preżumibbilment f'kull wieħed mill-fajls tiegħi?

854
00:39:40,072 --> 00:39:40,780
Just sejħa hija out.

855
00:39:40,780 --> 00:39:44,620
Liema linji huma duplikati
probabbilment madwar kollha ta 'dawn il-paġni?

856
00:39:44,620 --> 00:39:45,120
Yeah?

857
00:39:45,120 --> 00:39:46,110
>> STUDENT: [inaudible].

858
00:39:46,110 --> 00:39:47,660
>> DAVID J. Malan: 1 sa 9.

859
00:39:47,660 --> 00:39:48,720
Yeah, assolutament.

860
00:39:48,720 --> 00:39:52,080
1 sa 9, ħlief forsi 8
bidliet ftit għaliex CS50

861
00:39:52,080 --> 00:39:54,650
isir lectures jew
żero ġimgħa jew xi ħaġa.

862
00:39:54,650 --> 00:39:55,970
Iżda kważi identiċi.

863
00:39:55,970 --> 00:39:58,657
Allura dan kollu Jittieħed huwa biss
tip ta 'kkupjati u pasted.

864
00:39:58,657 --> 00:40:00,490
U hemm koppja
linji oħra I jistgħu jaħsbu

865
00:40:00,490 --> 00:40:05,000
ta 'dak huma probabbilment identiċi
madwar il-fajls kollha.

866
00:40:05,000 --> 00:40:06,315
>> STUDENT: 12 u 13.

867
00:40:06,315 --> 00:40:07,190
DAVID J. Malan: Yeah.

868
00:40:07,190 --> 00:40:11,220
Sure, 12, 13, u 14 probabbilment,
biss minħabba l-għalf interessanti

869
00:40:11,220 --> 00:40:15,460
qed jiġri fuq linji 11
u 10, għalhekk jidher.

870
00:40:15,460 --> 00:40:18,350
Mela ejja nħarsu lejn verżjoni 1,
li tipprova ttejjeb fuq dan.

871
00:40:18,350 --> 00:40:24,020
Fil-verżjoni 1 ta 'dan example-- MVC aħna ser
jispjegaw dak mezzi MVC fil moment--

872
00:40:24,020 --> 00:40:27,420
jekk immur fis indiċi, it-tip ta '
jistenna ftit konfuża issa.

873
00:40:27,420 --> 00:40:28,880
Huwa mhux daqshekk sempliċi bħal qabel.

874
00:40:28,880 --> 00:40:30,906
>> Iżda li ladarba inti tibda
taqrah b'attenzjoni, huwa

875
00:40:30,906 --> 00:40:32,530
pjuttost sempliċi dak li qed jagħmel.

876
00:40:32,530 --> 00:40:34,397
Apparentement linja 1 u
linja 8 ħadu post

877
00:40:34,397 --> 00:40:37,230
kollha ta 'l-għalf inti biss identified--
għalkemm biss għal miżura tajba,

878
00:40:37,230 --> 00:40:41,900
I ħallew il-ULS hemm biss fil-każ xi
ijiem, ma jkollhom lista ta 'affarijiet.

879
00:40:41,900 --> 00:40:47,860
U hekk bżonn huwa tip simili lira
jinkludu fil C. kopji u pejsts

880
00:40:47,860 --> 00:40:50,470
il-kontenut effettiv
dritt hawn fil dan il-fajl.

881
00:40:50,470 --> 00:40:53,650
>> Allura fil-header.php, kif inti
jista jiddeduċu mill-isem tagħha,

882
00:40:53,650 --> 00:40:55,330
se tkun l-header tal-paġna.

883
00:40:55,330 --> 00:40:57,110
Huwa tip ta 'orfni hawn.

884
00:40:57,110 --> 00:41:01,820
Hija biss għandha l-quċċata lilha, iżda
hemm l-ebda kontenut aktar hawn taħt.

885
00:41:01,820 --> 00:41:05,070
>> U jekk I tħares lejn footer sadanittant,
li kienet il-fajl oħra mentioned--

886
00:41:05,070 --> 00:41:08,830
dan wieħed anki inqas interessanti,
iżda għal darb'oħra, huwa komuni li kollox.

887
00:41:08,830 --> 00:41:10,250
Allura dan huwa l-footer.

888
00:41:10,250 --> 00:41:11,300
Dan huwa l-header.

889
00:41:11,300 --> 00:41:13,950
Dan huwa l-fajl li l-
jinbidlu, hekk għaliex ma

890
00:41:13,950 --> 00:41:18,140
jippruvaw fattur l-komunalità
B'dawn iż-żewġ linji hawn?

891
00:41:18,140 --> 00:41:20,090
>> Iżda nistgħu tnaddaf dan
up ftit aktar.

892
00:41:20,090 --> 00:41:23,260
Jien ser jimxi 'l quddiem u
jiftħu verżjoni tnejn fejn

893
00:41:23,260 --> 00:41:27,106
aħna ser tara li hemm
fajl ġdid, helpers.php.

894
00:41:27,106 --> 00:41:28,610
Aħna ser tara dak li huwa fil-mument.

895
00:41:28,610 --> 00:41:30,930
Ejja mur indiċi, bħala l-
punt ta 'dħul bħal qabel.

896
00:41:30,930 --> 00:41:35,230
>> U issa avviż jien jeħtieġu
helpers.php, mhux header jew footer.

897
00:41:35,230 --> 00:41:41,720
Iżda helpers huwa tip simili
helpers.c u helpers.h minn PSET 2

898
00:41:41,720 --> 00:41:46,150
jew PSET 3 twil ilu meta inti attwalment
ma tfittex u ssib għal dak PSET,

899
00:41:46,150 --> 00:41:50,950
u kellek kollha ta 'kodiċi tiegħek għall-issortjar
u tiftix fil-fajl separat.

900
00:41:50,950 --> 00:41:52,510
Dan huwa dak li qed jiġri hawn.

901
00:41:52,510 --> 00:41:54,390
>> U issa linja 3 jistenna ftit differenti.

902
00:41:54,390 --> 00:41:55,920
U huwa biss linja waħda.

903
00:41:55,920 --> 00:41:57,950
Biex tagħmel dan saħansitra aktar
ċara, I jistgħu biss

904
00:41:57,950 --> 00:42:01,820
do dan ikun stylistically konsistenti
ma 'kollox aħna ghamilt.

905
00:42:01,820 --> 00:42:04,130
Iżda li mhux verament
jinbidlu l-funzjonalità.

906
00:42:04,130 --> 00:42:05,880
Huwa wieħed biss linja tal-kodiċi reali.

907
00:42:05,880 --> 00:42:09,010
>> Apparentement, hemm funzjoni
x'imkien imsejħa tirrendi header,

908
00:42:09,010 --> 00:42:11,420
u dan huwa fejn l-affarijiet
jiksbu pretty qawwija.

909
00:42:11,420 --> 00:42:17,040
Avviż li ġewwa tal parentesi tagħha
huwa dak biċċa oħra ta 'sintassi?

910
00:42:17,040 --> 00:42:19,780

911
00:42:19,780 --> 00:42:23,350
Huwa probabbilment ftit diffiċli li wieħed jgħid, iżda
Avviż there's-- I ser tpoġġi xi abjad

912
00:42:23,350 --> 00:42:24,300
ispazju.

913
00:42:24,300 --> 00:42:25,530
Hemm parentesi kwadri.

914
00:42:25,530 --> 00:42:29,700
>> U parentesi kwadri rajna daqsxejn ilu
fil-kuntest ta 'arrays assoċjattiva,

915
00:42:29,700 --> 00:42:31,580
li huma, għal darb'oħra, bħal tabelli hash.

916
00:42:31,580 --> 00:42:36,230
U jekk taħseb issa sa C, il-
ordni ta 'argumenti in funzjoni

917
00:42:36,230 --> 00:42:37,570
għandu dejjem ikun l-istess.

918
00:42:37,570 --> 00:42:41,146
Int għandek tiftakar dak li l-
tordna x is--, y, z jew z, y, x--

919
00:42:41,146 --> 00:42:44,020
u inti għandek dejjem jipprovduhom
fl-istess ordni jew tfittex lilhom

920
00:42:44,020 --> 00:42:45,100
jekk inti ħadthom minsija.

921
00:42:45,100 --> 00:42:51,140
>> Iżda dan jidher li jkun mod għaqlija
tgħaddi valur ewlieni arbitrarja

922
00:42:51,140 --> 00:42:55,840
pari biha titolu huwa l-isem
ta 'argument f'dan il-każ

923
00:42:55,840 --> 00:42:58,334
u CS50 huwa l-valur tagħha.

924
00:42:58,334 --> 00:43:00,250
U l-fatt li għandi
dawn parentesi kwadri

925
00:43:00,250 --> 00:43:02,560
hawn ifisser li stajt
wkoll tgħaddi fil xi ħaġa

926
00:43:02,560 --> 00:43:07,550
bħal fil-ġimgħa huwa 1 jew 0 jew 2 jew 3.

927
00:43:07,550 --> 00:43:10,550
Allura aħna ħadthom parameterized
din il-funzjoni b'mod

928
00:43:10,550 --> 00:43:15,180
li hija tista 'tieħu inputs multipli,
iżda għal issa huwa biss il-wieħed.

929
00:43:15,180 --> 00:43:20,060
>> Jekk I issa jmorru fis helpers.php,
Avviż dak li qed jagħmel.

930
00:43:20,060 --> 00:43:22,030
Dan huwa ftit
ta 'funzjonalitajiet ġodda,

931
00:43:22,030 --> 00:43:24,190
iżda għal issa ħu
fuq il-fidi li dan huwa

932
00:43:24,190 --> 00:43:26,570
il-sintassi li magħhom inti
jiddefinixxu funzjoni fil-PHP.

933
00:43:26,570 --> 00:43:27,840
Inti litteralment say funzjoni.

934
00:43:27,840 --> 00:43:30,090
Inti ma jispeċifikawx ritorn
tip, u li konsistenti

935
00:43:30,090 --> 00:43:33,880
bid-dettal varjabbli qabel
fejn inti ma verament tip bil-qawwa.

936
00:43:33,880 --> 00:43:35,650
>> Dan biss jispeċifika
li, awtomatikament, din

937
00:43:35,650 --> 00:43:37,460
jieħu assoċjattiv
firxa bħala argument.

938
00:43:37,460 --> 00:43:38,210
U inti taf liema?

939
00:43:38,210 --> 00:43:41,450
Jekk l-utent ma jgħaddix wieħed
fi, tassumi valur default.

940
00:43:41,450 --> 00:43:44,680
>> Din hija karatteristika li C ma jkollux
għalina, li huwa sabiħ, għaliex issa

941
00:43:44,680 --> 00:43:46,430
data, anki jekk inti
ma tagħtiha xejn,

942
00:43:46,430 --> 00:43:49,300
se tkun
array iżda waħda vojta.

943
00:43:49,300 --> 00:43:51,860
U bħala twarrib, estratt
biss ma xi ħaġa funky

944
00:43:51,860 --> 00:43:56,380
fejn tieħu kollha tal-keys minn din
firxa assoċjattiva, l-affarijiet

945
00:43:56,380 --> 00:43:59,950
inti tista 'tpoġġi fil-parentesi kwadri,
u toħloq varjabbli barra minnhom

946
00:43:59,950 --> 00:44:06,270
sabiex inkunu nistgħu finalment ikollhom aċċess
lilhom fil footet.php u header.php.

947
00:44:06,270 --> 00:44:08,950
Li l-astratt ftit,
so let me punt dan out.

948
00:44:08,950 --> 00:44:12,990
>> Fil index.php, avviż li jien
tgħaddi fil-par valur ewlieni ta 'titolu

949
00:44:12,990 --> 00:44:14,850
b'valur ta 'CS50.

950
00:44:14,850 --> 00:44:18,660
Jekk I issa nħarsu lejn helpers.php,
avviż li RenderHeader

951
00:44:18,660 --> 00:44:23,870
huwa estrazzjoni li d-data li jien tgħaddi
fil, u mbagħad jeħtieġu header.php.

952
00:44:23,870 --> 00:44:27,970
What I ghamilt huwa tip ta 'raġel foqra
implimentazzjoni issa dawn li ġejjin.

953
00:44:27,970 --> 00:44:31,720
>> Jekk I jiftħu header.php,
avviż li stajt m'għadhomx iebsa

954
00:44:31,720 --> 00:44:34,890
kodifikati l CS50 kelma f'dan il-fajl header.

955
00:44:34,890 --> 00:44:39,310
Stajt tpoġġi dan ċertament atrociously
funzjoni jismu, Chars speċjali HTML,

956
00:44:39,310 --> 00:44:40,170
fil hemmhekk.

957
00:44:40,170 --> 00:44:41,640
Imma Avviż dak I ghamilt.

958
00:44:41,640 --> 00:44:44,240
Stajt ltqajna miftuħa HTML.

959
00:44:44,240 --> 00:44:47,420
I mbagħad ikollhom ras miftuħa u titolu miftuħ.

960
00:44:47,420 --> 00:44:52,380
>> U allura l ġewwa tat-titolu tal miftuħa u
tags qrib, għandi daqsxejn ta 'kodiċi PHP.

961
00:44:52,380 --> 00:44:56,670
U dan huwa sbieħ imma ta 'sintassi,
li ifisser biss eku out.

962
00:44:56,670 --> 00:44:59,840
Huwa letteralment ifisser this--
eku il following--

963
00:44:59,840 --> 00:45:01,910
iżda dan huwa sexier li tikteb.

964
00:45:01,910 --> 00:45:05,000
Eku out-titolu
li kien għadda fl.

965
00:45:05,000 --> 00:45:07,560
>> Imma x'taħseb HTML
char speċjali hija kollha dwar,

966
00:45:07,560 --> 00:45:10,590
speċjalment jekk ikollok
xi esperjenza HTML qabel?

967
00:45:10,590 --> 00:45:14,050
Liema karattri jista 'jkun
perikolużi li jgħaddu fl għal paġna

968
00:45:14,050 --> 00:45:17,980
fejn int dinamikament jiġġeneraw
il-paġna web bl-kodiċi bħal dan?

969
00:45:17,980 --> 00:45:21,370

970
00:45:21,370 --> 00:45:24,650
Let me go għal dan il-fajl, il-verżjoni
tnejn, u ara jekk ma nistax jinduċi dan.

971
00:45:24,650 --> 00:45:26,210
>> Verżjoni tnejn huwa dan.

972
00:45:26,210 --> 00:45:28,510
U avviż kollox
huwa multa, taħdem tajjeb.

973
00:45:28,510 --> 00:45:35,280
Imma suppose I jmorru fil index.php u
I speċifikat li t-titolu tal-paġna tiegħi

974
00:45:35,280 --> 00:45:36,630
mhuwiex CS50.

975
00:45:36,630 --> 00:45:44,930
Huwa bracket miftuħ allert iskrittura
Hello dinja, kwotazzjoni wieħed qrib,

976
00:45:44,930 --> 00:45:49,740
parentesi qrib, punto virgola,
parentesi miftuħa, iskrittura slash.

977
00:45:49,740 --> 00:45:51,897
>> Script, kif aħna ser
eventwalment tara, huwa tag

978
00:45:51,897 --> 00:45:54,480
li tista 'tuża għall-użu ieħor
lingwa ta 'programmar imsejjaħ

979
00:45:54,480 --> 00:45:56,330
JavaScript ġewwa ta 'paġna web.

980
00:45:56,330 --> 00:45:57,960
U issa avviż-loġika hawnhekk.

981
00:45:57,960 --> 00:45:59,840
Hawnhekk huwa ċentrali msejħa titolu.

982
00:45:59,840 --> 00:46:02,690
Hawnhekk huwa huwa valur fit crazy issa.

983
00:46:02,690 --> 00:46:07,840
>> Imma jekk immur għall-helpers page-
jew pjuttost, il-paġna header,

984
00:46:07,840 --> 00:46:11,310
Jien ssejjaħ din il-funzjoni
fuq dak it-titolu ewwel.

985
00:46:11,310 --> 00:46:15,250
Mela jekk jien issa Reload this Page, I
tara dan, li jidher redikoli,

986
00:46:15,250 --> 00:46:16,110
iżda huwa sikur.

987
00:46:16,110 --> 00:46:17,310
Hija biss jistenna stupid.

988
00:46:17,310 --> 00:46:20,320
>> Iżda jissoponi minflok
I kienet minsija dan.

989
00:46:20,320 --> 00:46:24,660
U Mark kliem tiegħi, numru nonzero
inti ser tinsa tagħmel dan

990
00:46:24,660 --> 00:46:27,790
u int ser tingħata xi industrious
student jew ħabib ġejjin up

991
00:46:27,790 --> 00:46:31,540
lilek fil-CS50 fiera jew anonimu
bil-lejl poking madwar fuq il-websajt tiegħek

992
00:46:31,540 --> 00:46:35,300
u essenzjalment tinjetta kodiċi
unbeknownst inti fis-sit tiegħek

993
00:46:35,300 --> 00:46:35,800
b'xi.

994
00:46:35,800 --> 00:46:39,000
>> Għaliex jekk I sempliċiment bżiq
out titolu hawn u titolu

995
00:46:39,000 --> 00:46:44,330
there-- ukoll, jekk it-titolu litteralment
tidher bħal dan u PHP

996
00:46:44,330 --> 00:46:47,660
bħala lingwa li tista bżiq
out test lingwi oħra,

997
00:46:47,660 --> 00:46:50,650
dan huwa litteralment għaddej
biex jissostitwixxu din tag bil,

998
00:46:50,650 --> 00:46:53,010
naturalment, dak li nressaq xi mkien ieħor.

999
00:46:53,010 --> 00:46:57,640
>> Hekk jekk I issa mur hawn u rikarigu wara
jintilfu dawn il-mekkaniżmi ta 'sikurezza,

1000
00:46:57,640 --> 00:46:59,982
issa għandi bonjour dinja hawn.

1001
00:46:59,982 --> 00:47:02,690
Issa dak li mhux kollha li kbir ta '
jittrattaw, imma int tista 'tagħmel xi ħaġa

1002
00:47:02,690 --> 00:47:05,119
ftit aktar malizzjużi
hawn, simili hemm

1003
00:47:05,119 --> 00:47:08,410
tags-- ieħor kif aħna ser tara ladarba nonfqu
aktar ħin fil JavaScript-- bħal post

1004
00:47:08,410 --> 00:47:14,910
dot href gets, kwotazzjoni, unquote, HTTP
business.com, iżda l-oppost ta 'dak

1005
00:47:14,910 --> 00:47:15,950
mill-oħra jum.

1006
00:47:15,950 --> 00:47:20,120
U issa inti tista 'tikkaġuna web
paġna li fil-fatt imorru immedjatament

1007
00:47:20,120 --> 00:47:21,190
għal din il-paġna web hawnhekk.

1008
00:47:21,190 --> 00:47:23,000
>> U fil-fatt, ma rridx
li anki jmorru għall business.com

1009
00:47:23,000 --> 00:47:24,749
minħabba I ma jridux
li tkun taf dak li hu.

1010
00:47:24,749 --> 00:47:28,710
Iżda dan, wisq, se jikkawżaw kodiċi
li jiġi injettat fil din il-paġna.

1011
00:47:28,710 --> 00:47:32,680
Allura dan huwa biss li jgħidu li anki jekk
aħna qed tintroduċi kmieni super fuq xi

1012
00:47:32,680 --> 00:47:36,800
ta 'dawn l-istrutturi aktar kumplessi,
dan kollu lejn tmiem ta 'l-iżgurar

1013
00:47:36,800 --> 00:47:39,320
dan il-kodiċi tiegħek mhix sfruttabbli.

1014
00:47:39,320 --> 00:47:40,960
>> Allura issa tielet verżjoni hawn.

1015
00:47:40,960 --> 00:47:42,470
Huwa jkollna fancier ftit.

1016
00:47:42,470 --> 00:47:44,875
I ma verament like--
in-naħa anali 'lili

1017
00:47:44,875 --> 00:47:47,750
kien jkollna ftit imdejqa mill-
fatt li kelli funzjoni msejħa

1018
00:47:47,750 --> 00:47:51,940
RenderHeader u RenderFooter
li kienu kważi identiċi.

1019
00:47:51,940 --> 00:47:55,400
Hekk ġara lili, għaliex ma
I parameterize dawn il-funzjonijiet

1020
00:47:55,400 --> 00:47:59,180
fis biss wieħed imsejjaħ jirrendu,
jitlob li jiġi tieħu t-tieni argument

1021
00:47:59,180 --> 00:48:04,420
bħall-isem tal-mudell, il-finali
li render-- jew header jew footer?

1022
00:48:04,420 --> 00:48:07,160
U mbagħad b'għażla, jekk irrid
li jgħaddu f'xi pari valur ewlenin

1023
00:48:07,160 --> 00:48:10,580
bħal I do għat-titlu għall-
header iżda mhux għall-footer,

1024
00:48:10,580 --> 00:48:11,800
I jistgħu jagħmlu dan.

1025
00:48:11,800 --> 00:48:16,510
>> U hekk issa jekk I tmur fis helpers.php,
huwa ftit aktar kumplessa.

1026
00:48:16,510 --> 00:48:19,670
U jien ser mewġa idejn tiegħi fil-
dettalji, imma huwa biss funzjoni waħda.

1027
00:48:19,670 --> 00:48:21,890
Allura dak pass lejn tfassil aħjar.

1028
00:48:21,890 --> 00:48:23,360
>> Nistgħu nieħdu dan il-pass wieħed ulterjuri.

1029
00:48:23,360 --> 00:48:28,890
Jekk immur fis raba tiegħi
verżjoni ta 'dan, l-avviż issa

1030
00:48:28,890 --> 00:48:31,320
li jien tagħmel xi ħaġa
saħansitra aktar tip ta 'cryptic.

1031
00:48:31,320 --> 00:48:33,230
U naf li dan huwa
ħafna biex jassorbu f'daqqa,

1032
00:48:33,230 --> 00:48:35,080
imma aħna qed biss tip
ta 'tindif affarijiet up.

1033
00:48:35,080 --> 00:48:38,550
Issa jien tqegħid helpers tiegħi
fajl ġo folder imsejjaħ

1034
00:48:38,550 --> 00:48:41,190
includes-- biss arbitrarju
isem fejn I tixtieq li tqiegħed Jittieħed

1035
00:48:41,190 --> 00:48:44,300
li nixtieq li include-- u mbagħad
il-bqija ta 'dan huwa l-istess.

1036
00:48:44,300 --> 00:48:47,140
>> Imma jekk jien tfittex issa gedit,
avviż li stajt gotten rid

1037
00:48:47,140 --> 00:48:51,940
kollha ta 'dawn il-fajls oħra u stajt
mċaqalqa minnhom, per eżempju, fis hawn.

1038
00:48:51,940 --> 00:48:55,110
U mbagħad fl templates,
I jkollhom din hawnhekk, wisq.

1039
00:48:55,110 --> 00:48:59,292
U għalhekk din hija kollha issa lejn pass
ta 'użu ta' mudell disinn ferm aħjar.

1040
00:48:59,292 --> 00:49:01,000
U aħna qed malajr ħafna
se jitbiegħed

1041
00:49:01,000 --> 00:49:03,870
minn funzjonalità default PHP,
li bdejna hawn ma,

1042
00:49:03,870 --> 00:49:07,655
fejn inti biss jħalltux flimkien PHP,
u HTML tiegħek, u CSS tiegħek,

1043
00:49:07,655 --> 00:49:09,780
u inti biss bżiq out
u inti tmur dwar mod tiegħek.

1044
00:49:09,780 --> 00:49:11,404
Huwa mhux se tkun maintainable ħafna.

1045
00:49:11,404 --> 00:49:14,481
Eżatt bħal fil-C, bdejna nużaw
fajls multipli u funzjonijiet multipli

1046
00:49:14,481 --> 00:49:15,730
u factoring affarijiet li l-.

1047
00:49:15,730 --> 00:49:16,688
Aħna ser tagħmel l-istess hawn.

1048
00:49:16,688 --> 00:49:19,970
U fil-fatt, fil-ħames u finali
verżjoni hawn, I ma ħaġa waħda oħra.

1049
00:49:19,970 --> 00:49:23,710
Tista 'anki tuża dot dot, li,
għal darb'oħra, huwa biss l-direttorju ġenitur.

1050
00:49:23,710 --> 00:49:28,260
Biex tkun saħansitra aktar konxji tas-sigurtà,
għaliex jekk I tħares lejn l-smigħ

1051
00:49:28,260 --> 00:49:32,450
hawn għal ħames u l-verżjoni finali, avviż
li għandi direttorju wieħed hawn jissejjaħ

1052
00:49:32,450 --> 00:49:35,180
pubbliku, u mbagħad fuq il-
istess livell, biex ngħidu hekk,

1053
00:49:35,180 --> 00:49:38,490
Stajt ltqajna jinkludi u templates
u mbagħad dan il-fajl test README.

1054
00:49:38,490 --> 00:49:41,130
>> U r-raġuni stajt strutturat
huwa simili this-- u web tant

1055
00:49:41,130 --> 00:49:44,330
hosts, speċjalment dawk $ 5
dawk xahar jew dawk $ 10 fix-xahar,

1056
00:49:44,330 --> 00:49:47,170
jekk inti stajt qatt kellu wieħed minn dawn
services-- dak hekk ħafna minnhom jagħmlu

1057
00:49:47,170 --> 00:49:50,690
huwa huma biss jistennew li inti dump kollha
ta 'fajls tiegħek fis direttorju wieħed,

1058
00:49:50,690 --> 00:49:53,640
bħal għamilna diġà ma
dan ħafna ewwel eżempju.

1059
00:49:53,640 --> 00:49:56,740
>> Iżda hekk kif inti tibda bini aktar
siti sofistikati li biss jaħżnu

1060
00:49:56,740 --> 00:50:00,480
data li jimpurtahom u fajls inti
jimpurtak, attwalment organizzazzjoni affarijiet

1061
00:50:00,480 --> 00:50:05,060
korrett u ma 'aktar sigurtà
sensi f'moħħu jista

1062
00:50:05,060 --> 00:50:07,927
nibdew biex jiddefendu
dawl tal-ħbieb

1063
00:50:07,927 --> 00:50:10,135
li inti għandek jew fi jew
barra ta 'din il-klassi li,

1064
00:50:10,135 --> 00:50:12,510
hekk kif tibda tagħmel
programmi ruħek fuq il-web,

1065
00:50:12,510 --> 00:50:15,140
ser tibda picking
fuqek u fuqhom.

1066
00:50:15,140 --> 00:50:17,420
>> U hekk aħna ser tħares
finalment fuq dan id-disinn.

1067
00:50:17,420 --> 00:50:20,010
Dan huwa biss stampa
li turi dan li ġej.

1068
00:50:20,010 --> 00:50:22,897
Aħna qed tmur biex jitqiegħdu kollha ta 'tagħna
programmazzjoni loġika fil-fajls wieħed jew aktar,

1069
00:50:22,897 --> 00:50:25,230
u aħna qed tmur biex tibda biss
sejħa dawk kontrolluri.

1070
00:50:25,230 --> 00:50:28,022
Huwa fejn l-imħuħ ta '
websajts tagħna attwalment huma.

1071
00:50:28,022 --> 00:50:29,730
Allura aħna qed tmur biex
għandhom fehmiet, u l-fehmiet

1072
00:50:29,730 --> 00:50:32,480
huma sempliċi kemm biss separat
files-- imsejħa templates, spiss.

1073
00:50:32,480 --> 00:50:34,410
Huma biss għandhom il-
estetika tal-paġna tiegħi,

1074
00:50:34,410 --> 00:50:37,020
dak li nixtieq il-paġna tfittex
like---kuluri u l-format

1075
00:50:37,020 --> 00:50:38,870
u l-pożizzjonijiet ta '
il-varjabbli kollha.

1076
00:50:38,870 --> 00:50:41,120
>> U imbagħad aktar interessanti
li aħna ser eventwalment tikseb sa

1077
00:50:41,120 --> 00:50:45,420
huwa l-mudell, li se jkun biss
il-kelma aħna SLAP fuq teknoloġiji oħrajn

1078
00:50:45,420 --> 00:50:47,771
li nġibu fil-
stampa, bħal databases attwali,

1079
00:50:47,771 --> 00:50:49,520
hekk li meta inti tixtieq
biex jiffrankaw l-informazzjoni,

1080
00:50:49,520 --> 00:50:52,140
inti mhux biss ibgħat email
biex Procter tiegħek jew lilek innifsek,

1081
00:50:52,140 --> 00:50:57,350
inti fil-fatt jaħżen fil database
jużaw lingwa oħra magħrufa bħala SQL.

1082
00:50:57,350 --> 00:51:00,450
U hekk aħna ser leave hawn illum u
pick up ma 'dan l-Erbgħa

1083
00:51:00,450 --> 00:51:02,990
u jintroduċu databases mbagħad.

1084
00:51:02,990 --> 00:51:06,940
>> [Daqq ta mużika]

1085
00:51:06,940 --> 00:54:24,555