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>> [Daqq tal-mużika]

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>> SPEAKER 1: Dan huwa CS50 u
dan huwa l-aħħar ta 'seba ġimgħa.

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Illum huwa forsi fejn aħna
verament tagħlim inti lingwi.

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Aħna introdotti fl-aħħar ftit ta '
ġimgħat HTML u CSS, la ta 'li

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huma lingwi ta 'programmar.

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U fil-fatt, anke jekk aħna ma
tħares lejn kważi kollha tal-lametti tal

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li HTML jiġi ma u kważi kollha
tal-proprjetajiet li CSS jiġi ma,

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dan huwa tip minnha għall HTML u CSS.

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Aħna ser biss ġeneralment
tibda jekk wieħed jassumi li inti

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jifhmu l-ideat ġenerali
ta 'tikketti, u l-attributi,

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u paġni qed tintbagħat
minn klijent biex server.

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>> Minħabba li llum aħna tibda tħares lejn
lingwa oħra ta 'programmar, PHP.

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Aħna qed tmur biex tagħmel dan super fast.

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Aħna mhux qed tmur biex jgħallmu PHP per se,
ferm simili aħna ma jaspiraw li jgħallmu

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C, per se, iżda pjuttost programmazzjoni.

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U fil-fatt, wieħed mill-
miri għall-dan il-kors

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m'għandux jgħallmu C,
jew HTML, CSS jew, jew PHP,

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jew kwalunkwe numru ta 'ieħor
kliem buzz jew akronimi,

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iżda l-xjenza tal-kompjuter
u kif il-programm fundamentalment.

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U fil-fatt, illum aħna tibda tieħu
dawk ir-roti ta 'taħriġ off kollha l-

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aktar mill jtajru permezz ta '
lingwa msejħa PHP, kif ġej.

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>> Hawnhekk huwa dak li din il-lingwa Dehra.

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Jirriżulta li m'hemm l-ebda ħtieġa għal
funzjoni ewlenija fi programm bil-miktub

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f'lingwa imsejjaħ PHP.

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Allura li diġà ħsejjes ftit aktar sempliċi
minn C, li aħna qed familjari.

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Jirriżulta li jekk inti
tixtieq li tiddikjara varjabbli,

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inti tagħmel dan kważi identiku għal C. Imma
hemm b'mod ċar differenza wieħed hawn

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meta Niddikjara string,
jew forsi żewġ differenzi.

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Dak li jistenna differenti?

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>> UDJENZA: Il-sinjal dollaru.

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>> SPEAKER 1: Iva, hemm dollaru
sinjal, li aħna stajt qatt qabel.

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U dak li huwa nieqes?

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Yeah?

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>> UDJENZA: [inaudible]

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>> SPEAKER 1: Yeah, hemm ebda tip ta 'data.

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Għalhekk jirriżulta li PHP huwa dak li aħna
sejħa lingwa laxk ittajpjat, fejn

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C hu ittajpjat b'mod qawwi.

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Laxk ittajpjata ifisser biss li
hemm tipi differenti ta 'data,

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hemm kordi, u ints, u floats.

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Iżda l-figuri tal-kompjuter li l-.

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Inti l-programmer bniedem
m'għandhomx għalfejn figura hija out.

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Allura kull ma għandek tagħmel
li tiddikjara varjabbli hija

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sinjal dollaru, l-isem ta 'tiegħek
varjabbli, u mbagħad, per eżempju,

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kwotazzjoni unquote, bonjour dinja.

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>> Ukoll dan huwa dak
kundizzjoni qisu fil-PHP.

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Kwalunkwe differenza?

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00:02:08,328 --> 00:02:10,650

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No

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Għalhekk jirriżulta li dawn huma identiċi.

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U inti jista 'jkollok inqas
fergħat jew aktar fergħat,

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iżda l-dawriet sintassi
eżattament l-istess.

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Espressjonijiet Boolean jistgħu
jiġu ordnati flimkien.

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Espressjonijiet Boolean
jistgħu jiġu anded flimkien.

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Inti xorta jkollhom switches.

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Anki jekk int ma użati
dawn, dawn ma jeżistux fis-C

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u dawn qed funzjonalment
ekwivalenti fil-PHP.

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>> U fil-fatt, fil-PHP dawn qed
ftit aktar qawwija.

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Fil C, inti tista 'tqabbel biss ċerti
tipi ta 'data bħal ints u Chars,

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billi fil-PHP inti tista 'attwalment tqabbel
kordi sħiħa fledge mingħajr ma jkollhom

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ninkwetaw dwar pointers u simili.

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Allura hawnhekk a għal loop.

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Dan huwa biss pseudocode
kodiċi, jekk inti se.

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Iżda strutturalment huwa identiku għall C.

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>> Hawn loop waqt, pseudocode
therefore-- identika għal C.

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Hawn do waqt loop-- identiċi.

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U hekk hemm tip ta '
dan il-mudell hawn biha

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hemm sintattika oħra ftit
Karatteristiċi aħna qed tabilħaqq ser tara.

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Fil-fatt, hawnhekk huwa sabiħ
mod fil-PHP fejn,

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jekk inti tixtieq li jtenni
fuq firxa, u inti

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ma jridux jaqbżu permezz tal-
ċrieki mentali u sintattiku ta 'wara

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int i ugwali 0, i inqas
minn n, i plus plus-- li

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huwa biss ta 'lott ta' sintassi annoying.

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Tista 'tgħid ftit aktar
fluidly għal kull numri

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kif numru, fejn f'dan il-każ
numri sinjal dollaru, jien jekk wieħed jassumi,

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huwa simili Firxa ċemplu numri.

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U allura jien jekk wieħed jassumi numru,
singular, se jkun fattur varjabbli.

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>> U dak PHP se tagħmel għalija bħala I jtenni
matul dan loop huwa, fuq kull iterazzjoni,

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li għaddej taġġorna n-numru varjabbli li
jkun l-element ith f'numri, plural.

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Allura hija biss mankijiet kollha ta 'dik għalija.

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Nru parentesi kwadri, ebda
sinjal dollaru, l-ebda semi-colons.

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Huwa biss ftit aktar sempliċi.

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Ukoll, jekk inti tixtieq
firxa, jirriżulta inti

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tista 'tagħmel xi ħaġa pjuttost simili għall
C. Is-sintassi hija xi ftit differenti.

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Iżda hawn l-firxa msejjaħ
dollaru iffirmat numri.

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U jien tuża, PHP, kwadru
parentesi, jirriżulta.

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U aħna qed tmur biex tara dawn mill-ġdid
fil JavaScript-- għadhom f'lingwa oħra.

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I biss użu notazzjoni parentesi kwadri
li jkollhom lista virgola separati

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tan-numri interi, f'dan il-każ.

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Iżda li tagħti me firxa.

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>> Iżda anke aktar qawwija fil-PHP,
irridu wkoll liema huma ġeneralment

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imsejħa arrays assoċjattiva.

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U ħafna ta 'lingwi
jkollhom dawn ukoll.

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Il-ħaġa dwar arrays C
hija li l-indiċi

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għal firxa, il-ħaġa li inti
użu fil-parentesi kwadri li permezz tagħhom

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inti aċċess elementi, għandu jkun dak?

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>> UDJENZA: [inaudible]

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>> SPEAKER 1: Huma għandhom ikunu n-numri jew
interi, speċifikament minn żero fuq up.

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Ukoll, fil-PHP, u, jirriżulta
out, f'lingwi oħra,

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inti tista 'tibda li jkollhom
indiċijiet li mhumiex numerika.

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Iżda dawn qed attwalment kliem jew
frażijiet, b'tali mod li minflok

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tipprova tiftakar fejn xi ħaġa
huwa, jew maħżuna i varjabbli,

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inti tista 'attwalment jużaw kelma u jgħidu
that-- inti tista 'tgħid kelma bħal dan.

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>> Allura kwotazzjoni sinjal dollaru hija l-
isem ta 'varjabbli hawn.

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Dan huwa sintassi kemmxejn funky
dan huwa jassoċjaw tnejn valur ewlieni

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pari għal dan il-varjabbli.

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Speċifikament, dan qed tagħti me
firxa li huwa ta 'tul 2.

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Iżda l-indiċi mhumiex 0 u 1.

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L-indiċi huma quote unquote
simbolu u l-prezz unquote kwotazzjoni.

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U l-valuri ta 'dawk indiċi,
rispettivament, hija FB għall Facebook

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u $ 79.53, meta I aħħar
ċċekkjati prezz għal dan.

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>> Xi tfisser?

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Ukoll, dan ifisser li
minflok kitba kodiċi

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bħal dan, fejn I użati biex jagħmlu xi ħaġa
bħal sign-- dollaru jew aktar, fis-C

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Jien ma anki jkollha sinjal dollaru.

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Jien kont nagħmel xi ħaġa
bħal kwotazzjonijiet u mbagħad

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Jien kont nagħmel parentesi i biex nikseb f'xi
arbitrarju numerikament valur indiċjati.

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Mill-lum fil-PHP, jekk inti
rridu nġibu f'xi valur,

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aħna tip ta 'aktar
expressiveness semantika.

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Biss mod fancy ta 'tgħid nistgħu
biss sejħa affarijiet dak li huma.

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>> U jekk inti tixtieq li tikseb
fil simbolu xi ħaġa,

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issa inti litteralment tagħmel
nikkwota simbolu unquote

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fil-parentesi kwadri
minflok sempliċi numru.

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Allura huwa konvenjenza sbieħ.

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U li tip ta 'dan għal issa.

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Hemm għenieqed ta '
Karatteristiċi oħra fil PHP.

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U fil-fatt, PHP jiġi ma
l-sink tal-kċina proverbial.

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Għexieren, mijiet ta 'funzjonijiet jiġu mal
PHP-- tant aktar minn daħal mal C.

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>> U li mhux maħsub biex
jisbqu iżda pjuttost jgħinu

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inti tirrealizza li aħna ebda
aktar għalfejn jikteb il-kodiċi

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dan huwa tip ta 'isfel hawn kunċettwalment.

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Issa nistgħu biss jibdew jieħdu vantaġġ
ta ħafna aktar avvanzati karatteristiċi

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li l-lingwi bħal PHP jkollhom.

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Allura aħna ma jkollhomx għalfejn tinkwieta dwar
affarijiet jimxu madwar fil-memorja.

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Aħna ma jkollhom għalfejn tinkwieta dwar malloc
u kollha ta 'dawn f'livell aktar baxx,

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Dettalji qawwija li inti se wrestle
ma ', jekk mhux jissieltu ma, pset5,

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00:06:09,390 --> 00:06:13,380
imma inti tista 'tibda
Hekk jieħdu għal mogħtija.

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>> Fil-fatt, ejja jiktbu super
programm sempliċi fil-PHP, kif ġej.

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Jien se jmorru ras fis CS50
IDE hawn, u dak li jien ser tagħmel

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hu li toħloq fajl ġdid, li sempliċiment ħafna
se jissejjaħ bonjour dot PHP.

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Allura minflok dot c, huwa
se jissejjaħ dot PHP.

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U allura f'dan il-fajl,
I tista 'tibda ittajpjar.

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Iżda jirriżulta li l-
ħaġa waħda I għandek tkun taf

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huwa li kull fajl PHP b'mod ġenerali, jeħtieġ
li tibda ma 'xi sintassi speċjali.

146
00:06:41,470 --> 00:06:44,570
Simili fl-ispirtu li HTML, iżda għal darb'oħra,
PHP hija lingwa ta 'programmar, mhux

147
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lingwa markup.

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>> Allura kull fajl, u huwa sort
tal stupid tfittex jien ser jammettu.

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Parentesi miftuħa, kwistjoni mark, PHP.

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U dan huwa biss l-
Mod lingwa ta 'tgħid,

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ħej, kompjuter hawnhekk jidħol xi kodiċi
miktub fl-lingwa imsejjaħ PHP.

152
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U mbagħad fl-aħħar nett tal-fajl tiegħek,
inti tagħmel tip ta 'tip ta' l-oppost.

153
00:07:01,900 --> 00:07:04,860
Inti ma jiktbu PHP darb'oħra, inti biss
do trade mark in kwistjoni, parentesi angolu.

154
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U allura xejn inti tpoġġi ġewwa
ta 'dawn iż-żewġ tikketti, biex ngħidu hekk,

155
00:07:08,500 --> 00:07:11,490
se tkun, jew għandu jkun, kodiċi PHP.

156
00:07:11,490 --> 00:07:13,180
>> Mela ejja jagħmlu xi ħaġa super sempliċi.

157
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Jien ser jimxi 'l quddiem u jagħmlu print
def, bonjour dinja, backslash n, jiffrankaw.

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00:07:19,370 --> 00:07:27,310
U issa fil-pront tiegħi, jien ser
tagħmel, tagħmel hello-- no, jien ser jagħmlu,

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dot mmejla bonjour.

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Le, dot mmejla, hm.

161
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Allura xi ħaġa l differenti.

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00:07:32,990 --> 00:07:36,920
U fil-fatt, din hija differenza ewlenija
bejn PHP u lingwi bħal C. C

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00:07:36,920 --> 00:07:38,730
kienet hekk imsejħa lingwi ikkumpilata.

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00:07:38,730 --> 00:07:40,929
What did jfisser għall C li għandha tkun ikkumpilata?

165
00:07:40,929 --> 00:07:41,970
Liema kienet l-implikazzjoni?

166
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Yeah.

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>> UDJENZA: Kiteb fis-kodiċi magna
għalhekk tista 'titmexxa mill-kompjuter.

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00:07:45,220 --> 00:07:46,011
>> SPEAKER 1: Eżattament.

169
00:07:46,011 --> 00:07:49,075
Irridu ewwel jissarfu fi
hekk imsejħa kodiċi magna, żerijiet u dawk,

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qabel ma fil-fatt se jkun esegwibbli
u mifhuma mill-kompjuter.

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Minn Intel ġewwa.

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00:07:52,840 --> 00:07:54,530
Mill-CPU ġewwa tal-kompjuter.

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PHP, b'kuntrast, huwa dak li sejjaħ
lingwa interpretat, li

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00:07:58,170 --> 00:08:02,230
ifisser li inti ma josservawha
fis żerijiet u dawk, kodiċi magna,

175
00:08:02,230 --> 00:08:04,360
inti minflok tħalli bħala kodiċi sors.

176
00:08:04,360 --> 00:08:08,130
U inti minflok tgħaddiha bħala input
għal programm, interpretu

177
00:08:08,130 --> 00:08:11,960
li xi ħadd ieħor kiteb
snin ilu li jifhem dan

178
00:08:11,960 --> 00:08:14,310
linja b'linja, karattri għall-karattru.

179
00:08:14,310 --> 00:08:16,120
Allura fi kliem ieħor,
bnedmin kiteb hemmhekk

180
00:08:16,120 --> 00:08:19,670
programm li se tħares
fil-kodiċi line tiegħek billi linja,

181
00:08:19,670 --> 00:08:21,680
u ċifra barra dak
il-kompjuter għandha tagħmel,

182
00:08:21,680 --> 00:08:25,960
mingħajr ma jbiddel it
direttament lill żerijiet u dawk.

183
00:08:25,960 --> 00:08:28,370
>> Mela jekk jara għall loop,
din l-hekk imsejħa interpretu

184
00:08:28,370 --> 00:08:30,630
se tkun simili, id-dritt, I għandu
tagħmel xi ħaġa għal darb'oħra u għal darb'oħra u għal darb'oħra.

185
00:08:30,630 --> 00:08:31,150
X'irrid nagħmel?

186
00:08:31,150 --> 00:08:32,159
Let me ħarsa lejn il-linja li jmiss.

187
00:08:32,159 --> 00:08:33,367
Let me ħarsa lejn il-linja li jmiss.

188
00:08:33,367 --> 00:08:35,350
U tassew tinterpreta dan linja b'linja.

189
00:08:35,350 --> 00:08:37,220
Allura li jiġi esegwit, I ma jużawx jagħmlu.

190
00:08:37,220 --> 00:08:39,409
I ma jużawx dot slash f'dan il-każ.

191
00:08:39,409 --> 00:08:43,530
I minflok tagħmel PHP, li hija
l-isem ta 'programm, a.k.a.

192
00:08:43,530 --> 00:08:46,562
Interpretu, li
installat minn qabel fil CS50 IDE,

193
00:08:46,562 --> 00:08:48,770
u issa għandi bżonn biex jgħaddu minn
argument linja tal-kmand, li

194
00:08:48,770 --> 00:08:52,290
hija sempliċement l-isem tal-
fajl li nixtieq li tinterpreta.

195
00:08:52,290 --> 00:08:54,740
Jew aktar każwali, li nixtieq li jimxu.

196
00:08:54,740 --> 00:08:57,000
U jekk I hit Ikteb, hemm aħna għandna hija.

197
00:08:57,000 --> 00:08:57,825
Hello dinja.

198
00:08:57,825 --> 00:08:59,950
Issa jirriżulta li I
def print użati deliberatament

199
00:08:59,950 --> 00:09:01,600
biex titnaqqas lilna minn C sa PHP.

200
00:09:01,600 --> 00:09:05,150
Ħafna programmaturi PHP, kif tkun taf tara,
ma lanqas biss jitħajru jużaw def print.

201
00:09:05,150 --> 00:09:08,290
Huma biss l-użu funzjoni msejħa
istampar, li C ma kellux.

202
00:09:08,290 --> 00:09:11,390
U hekk jekk I terġa issa, attwalment
iġib ruħu funzjonalment-istess.

203
00:09:11,390 --> 00:09:13,730
I ma tistax tuża l-mija s
u mija i u oħrajn,

204
00:09:13,730 --> 00:09:16,250
iżda hemm modi oħra
fil-PHP li jagħmlu dan.

205
00:09:16,250 --> 00:09:18,100
Iżda din hija biss li
jgħidu li sintattikament,

206
00:09:18,100 --> 00:09:21,850
minbarra xi affarijiet stramb up
top, u xi karattri stramb isfel

207
00:09:21,850 --> 00:09:25,960
fil-qiegħ, il-kunċetti issa ta
programmazzjoni f'din il-lingwa l-oħra

208
00:09:25,960 --> 00:09:27,860
ser ikunu eżattament l-istess.

209
00:09:27,860 --> 00:09:30,120
>> Fil-fatt, ejja nagħmlu eżempju ieħor.

210
00:09:30,120 --> 00:09:32,520
Hekk jien ser jimxi 'l quddiem
u qrib dan il-fajl.

211
00:09:32,520 --> 00:09:37,740
Let me toħloq xulxin li
I ser sejħa kondizzjonijiet 1 dot PHP.

212
00:09:37,740 --> 00:09:40,770
Allura l-ebda żero, għaliex dak li għamilt
kien I ħares lura ftit ġimgħat ilu,

213
00:09:40,770 --> 00:09:43,490
kellna fajl imsejjaħ
kondizzjonijiet 1 dot C. U dak

214
00:09:43,490 --> 00:09:47,590
I ma kien konvertiti fil tiegħi
ras, u fil hawn fuq karta,

215
00:09:47,590 --> 00:09:51,290
u dalwaqt fuq li l-kors
website, linja b'linja fil PHP.

216
00:09:51,290 --> 00:09:55,520
>> Allura fil-verżjoni C, għamilna xi ħaġa
bħal string s gets tikseb string.

217
00:09:55,520 --> 00:09:58,200
Allura huwa differenti ftit
biex tagħmel dan fil-PHP.

218
00:09:58,200 --> 00:10:01,390
Minflok, jien biss ser
li tagħmel, jew minflok, I

219
00:10:01,390 --> 00:10:05,870
jista 'jsir int n gets tikseb
int, f'dan l-eżempju qabel.

220
00:10:05,870 --> 00:10:12,600
Allura minflok li, jien ser tagħmel n
gets taqra linja, nixtieq integer,

221
00:10:12,600 --> 00:10:13,670
jekk jogħġbok.

222
00:10:13,670 --> 00:10:15,110
Allura dan huwa biss tiegħi fil-pront.

223
00:10:15,110 --> 00:10:17,260
U hekk jirriżulta, u
Nixtieq biss jafu dan

224
00:10:17,260 --> 00:10:20,480
meta tkun taqra jew raw il-funzjoni
qabel, aqra linji ta 'funzjoni fil PHP

225
00:10:20,480 --> 00:10:23,810
jieħu argument li hija fil-pront
għall-bniedem, u l-iskop tagħha fil-ħajja

226
00:10:23,810 --> 00:10:26,220
huwa li jaqra linja ta 'test
li hu jew hi tipi fil.

227
00:10:26,220 --> 00:10:29,160
U allura huwa jaħżen li
test fil-n varjabbli.

228
00:10:29,160 --> 00:10:32,200
>> U issa I tista 'tixtieq li tagħmel xi ħaġa
bħal I ma ġimgħat ilu, fil-ġimgħa bħal

229
00:10:32,200 --> 00:10:33,290
wieħed mill-klassi.

230
00:10:33,290 --> 00:10:36,600
Jekk n hija akbar minn
żero, allura, jien ser

231
00:10:36,600 --> 00:10:42,930
li tissellef li sintassi aħna biss raw,
def istampar, inti qabad numru pożittiv,

232
00:10:42,930 --> 00:10:44,360
n backslash.

233
00:10:44,360 --> 00:10:49,990
Else jekk n ugwali ugwali żero, jien
se jimxi 'l quddiem u jgħidu, def istampar,

234
00:10:49,990 --> 00:10:54,090
inti qabad żero n backslash.

235
00:10:54,090 --> 00:10:56,830
Inkella, il-każ hawnhekk għandu
naturalment tkun, def jistampa,

236
00:10:56,830 --> 00:10:58,620
inti qabad numru negattiv.

237
00:10:58,620 --> 00:11:00,970
>> U nistgħu ċertament jimplimentaw
il-loġika ta 'dan il-ħaġa

238
00:11:00,970 --> 00:11:03,390
fi mazz ta differenti
modi, imma l-punt hawn

239
00:11:03,390 --> 00:11:07,210
hija li sintattikament,
bilkemm xejn huwa ġdid.

240
00:11:07,210 --> 00:11:09,830
Huwa biss is-sinjal dollaru u
funzjoni ġdida u l-linja jinqara.

241
00:11:09,830 --> 00:11:12,090
Imma fundamentalment, x'hemm ġdid
issa huwa Jien jinterpretaw dan.

242
00:11:12,090 --> 00:11:13,910
Jien jgħaddiha bħala input
għal programm ieħor.

243
00:11:13,910 --> 00:11:16,620
Mela jekk jien tixtieq li run dan, jekk
I ma tagħmel xi żbalji,

244
00:11:16,620 --> 00:11:20,140
Jien ser jimxu PHP, ta
kondizzjonijiet 1 dot PHP, Ikteb,

245
00:11:20,140 --> 00:11:23,440
Jien ser tip fil-numru 50,
u ejja nassumu għal issa taħdem.

246
00:11:23,440 --> 00:11:25,940
Minħabba li l-loġika hija l-
istess għalf bħal ġimgħa.

247
00:11:25,940 --> 00:11:28,020
>> Kull dritt, hekk li pjuttost
underwhelming, id-dritt?

248
00:11:28,020 --> 00:11:30,240
Stajna nagħmlu dan fi kwalunkwe
numru ta 'lingwi.

249
00:11:30,240 --> 00:11:33,200
Ejja nagħmlu mod xi ħaġa aktar qawwija.

250
00:11:33,200 --> 00:11:35,610
Ejja problema finitura stabbiliti ħamsa.

251
00:11:35,610 --> 00:11:37,370
Hekk jien ser jimxi 'l quddiem u jagħmlu dan.

252
00:11:37,370 --> 00:11:42,920
Jien ser toħloq fajl
imsejħa dizzjunarju dot PHP,

253
00:11:42,920 --> 00:11:45,424
u nklinat kif inti tista 'tkun
ġirja isfel lottijiet ta 'noti,

254
00:11:45,424 --> 00:11:47,340
in-noti se jgħinu biss
jekk int permess

255
00:11:47,340 --> 00:11:48,923
biex jimplimentaw problemi stabbiliti ħamsa fil-PHP.

256
00:11:48,923 --> 00:11:52,706
Iżda aħna ser tara kif malajr issa aħna
tista 'timplimenta l-istess sett problema.

257
00:11:52,706 --> 00:11:56,830
>> Għalhekk fl-dizzjunarju dot PHP, I vais
li wieħed jassumi li hemm diġà

258
00:11:56,830 --> 00:11:58,514
fajl fid-dinja msejħa speller.

259
00:11:58,514 --> 00:12:01,430
U fil-fatt, I ma 'dan bil-quddiem,
u aħna mhux se jimxu permezz din il-linja

260
00:12:01,430 --> 00:12:03,596
billi line, imma jekk int
kurjużi aktar tard u verament irridu

261
00:12:03,596 --> 00:12:06,250
biex nagħlaq moħħok madwar il-
differenzi bejn cu PHP,

262
00:12:06,250 --> 00:12:09,030
litteralment tqabbel dan il-fajl,
speller, mill-kodiċi sors tal-lum

263
00:12:09,030 --> 00:12:11,190
li aħna ser post aktar tard
illum, kontra sett p

264
00:12:11,190 --> 00:12:15,309
Ta 'ħames speller dot c li aħna nagħtuk,
u huwa kważi l-istess linja b'linja.

265
00:12:15,309 --> 00:12:16,600
Hemm xi sinjali aktar dollaru.

266
00:12:16,600 --> 00:12:18,330
A funzjonijiet koppja huma
ftit differenti.

267
00:12:18,330 --> 00:12:20,038
Iżda huwa mod sabiħ
tal tip ta 'jara kemm

268
00:12:20,038 --> 00:12:22,740
inti tittraduċi lingwa għal oħra.

269
00:12:22,740 --> 00:12:24,812
U huwa linja kważi identiċi għal-linja.

270
00:12:24,812 --> 00:12:27,770
Imma jien ser jassumi li dan
jeżisti, u dak li jien ser tagħmel hawn

271
00:12:27,770 --> 00:12:31,310
huwa tipprova blow tiegħek
mind mill reimplementing

272
00:12:31,310 --> 00:12:36,210
l intier ta 'problema stabbiliti ħamsa mod
aktar mgħaġġel milli inti kont qed tagħmel s'issa.

273
00:12:36,210 --> 00:12:39,330
Allura per eżempju, jien ser ewwel
tiddikjara varjabbli globali imsejjaħ daqs,

274
00:12:39,330 --> 00:12:40,444
u stabbilit ugwali għal żero.

275
00:12:40,444 --> 00:12:41,610
Issa li mhux iffrankar ħafna.

276
00:12:41,610 --> 00:12:44,170
Odds huma inti implimentati
daqs pretty ħafna l-istess,

277
00:12:44,170 --> 00:12:48,440
jew ħjiel ħjiel, se tonight jew għada,
biss bl-użu ta 'varjabbli globali msejħa

278
00:12:48,440 --> 00:12:49,900
daqs, u dan ikun iffissat ugwali għal żero.

279
00:12:49,900 --> 00:12:52,660
Li mhux partikolarment
spoiler aqwa.

280
00:12:52,660 --> 00:12:57,180
>> Allura liema kienu d-data tiegħek strutturi ta
għażla, dawk fostkom li għadhom dived fil

281
00:12:57,180 --> 00:13:02,170
u taqra l-spec, strutturi dak dejta
jkunu ħafna minnkom kienu jużaw?

282
00:13:02,170 --> 00:13:06,840
Tabella hash jew jippruvaw, forsi
xi varjanti tagħhom.

283
00:13:06,840 --> 00:13:10,490
Allura implimentazzjoni tabella hash għall-inqas,
huwa tip ta 'lott ta' linji ta 'kodiċi,

284
00:13:10,490 --> 00:13:10,990
id-dritt?

285
00:13:10,990 --> 00:13:13,700
U mhux kollha kemm huma jistgħu jkunu
funzjonali f'dan il-punt fil-ġimgħa,

286
00:13:13,700 --> 00:13:14,366
iżda li l-multa.

287
00:13:14,366 --> 00:13:19,300
Minħabba fil-PHP, jekk I
jridu tabella hash, isir.

288
00:13:19,300 --> 00:13:20,260
Dritt?

289
00:13:20,260 --> 00:13:22,610
Allura dak il-varjabbli li stajt
biss iddikjarat hija ovvjament

290
00:13:22,610 --> 00:13:26,180
imsejħa tabella sinjal dollaru,
per introduzzjoni qabel.

291
00:13:26,180 --> 00:13:28,902
>> Imma I really biss trid, fil
l-aħħar tal-ġurnata, firxa.

292
00:13:28,902 --> 00:13:31,610
Iżda mhux numerikament indiċjati
firxa, għaliex dan huwa simili ġimgħatejn

293
00:13:31,610 --> 00:13:33,440
Jittieħed, meta tkellimna dwar arrays.

294
00:13:33,440 --> 00:13:34,850
Irrid tabella hash.

295
00:13:34,850 --> 00:13:38,070
Iżda tabella hash huwa verament
biss mod konkret ta 'tgħid,

296
00:13:38,070 --> 00:13:40,190
inti tixtieq firxa assoċjattiva.

297
00:13:40,190 --> 00:13:43,270
Inti tixtieq li tkun tista '
ċwievet assoċjati ma 'valuri.

298
00:13:43,270 --> 00:13:44,200
Keys b'valuri.

299
00:13:44,200 --> 00:13:45,640
X'inhu dizzjunarju, tassew?

300
00:13:45,640 --> 00:13:47,080
Ukoll huwa mazz sħiħ ta 'ċwievet.

301
00:13:47,080 --> 00:13:50,320
Kliem bħal tuffieħ, lanġas, u banana,
u kollha ta 'dawn il-kliem Ingliż

302
00:13:50,320 --> 00:13:51,490
li aħna banda inti.

303
00:13:51,490 --> 00:13:54,820
>> U l-valuri li int effettivament
ddaħħal fis-dizzjunarju tiegħek

304
00:13:54,820 --> 00:13:57,790
huma jew vera, jew in-nuqqas, falza.

305
00:13:57,790 --> 00:14:00,540
Fi kliem ieħor inti ddaħħal
mazz sħiħ ta 'pari b'valur ewlenin,

306
00:14:00,540 --> 00:14:03,720
tuffieħ, vera, lanġas, vera, banana, vera.

307
00:14:03,720 --> 00:14:07,446
B'tali mod li meta inti tkun irkuprata jew tfittex
up li d-data fit-tabella hash tiegħek

308
00:14:07,446 --> 00:14:10,070
b'funzjoni check tiegħek, int
jew jkollna lura risposta,

309
00:14:10,070 --> 00:14:13,260
iva, I sabuha fil-kumpless tiegħi
hash mejda, jew l-ebda, mhuwiex hemmhekk,

310
00:14:13,260 --> 00:14:14,540
sabiex inti tirritorna falza.

311
00:14:14,540 --> 00:14:19,440
>> Allura biex tagħmel dan, kollha I bżonn huwa l-data
istruttura bħal I propost qabel.

312
00:14:19,440 --> 00:14:22,050
I biss bżonn biex ikunu jistgħu
kliem jassoċjaw

313
00:14:22,050 --> 00:14:25,570
simili, kwotazzjoni unquote, simbolu,
b'valur simili, veru.

314
00:14:25,570 --> 00:14:27,090
Allura hemm tabella hash tiegħi.

315
00:14:27,090 --> 00:14:28,180
Ejja attwalment jużawha.

316
00:14:28,180 --> 00:14:30,310
Allura hemm ftit funzjonijiet
I bżonn biex jiġu implimentati.

317
00:14:30,310 --> 00:14:33,300
Jien ser jimxi 'l quddiem u gidma
off-funzjoni tissejjaħ daqs.

318
00:14:33,300 --> 00:14:34,390
Huwa jieħu ebda argumenti.

319
00:14:34,390 --> 00:14:36,660
I ma jkollhom jolqot bl
il-kelma, null, PHP.

320
00:14:36,660 --> 00:14:38,770
Jien sempliċiment ser jirritornaw daqs.

321
00:14:38,770 --> 00:14:41,287
>> U bħala twarrib, PHP
dan id-dettall minorly annoying,

322
00:14:41,287 --> 00:14:44,620
fejn jekk xi ħaġa huwa globali, inti għandek
tgħid il-funzjoni fejn inti qed tuża

323
00:14:44,620 --> 00:14:46,220
dan, ħej, dan huwa varjabbli globali.

324
00:14:46,220 --> 00:14:49,330
Allura, stupidity minuri, iżda inti
għandek tagħmel dan xorta waħda.

325
00:14:49,330 --> 00:14:50,920
>> Allura dak dwar tagħbija?

326
00:14:50,920 --> 00:14:52,990
Jien ser jimplimentaw
funzjoni msejħa tagħbija

327
00:14:52,990 --> 00:14:56,790
li jieħu fl-isem ta 'dizzjunarju,
bħal fil-problema stabbiliti ħamsa.

328
00:14:56,790 --> 00:14:59,554
U qabel I tipproċedi,
avviż li għandi ma

329
00:14:59,554 --> 00:15:00,970
ġew ittajpjar pjuttost l-istess affarijiet.

330
00:15:00,970 --> 00:15:06,060
X'hemm ovvjament differenti fil-PHP dwar
kif inti tiddikjara funzjoni versus C?

331
00:15:06,060 --> 00:15:06,616
Yeah.

332
00:15:06,616 --> 00:15:07,490
UDJENZA: [inaudible]

333
00:15:07,490 --> 00:15:08,573
SPEAKER 1: L-ebda tip ta 'ritorn.

334
00:15:08,573 --> 00:15:12,350
U fil-fatt, dan huwa l-każ, PHP
safejn huwa laxk ittajpjat,

335
00:15:12,350 --> 00:15:14,190
huwa wkoll ftit sloppy f'dan is-sens.

336
00:15:14,190 --> 00:15:17,680
Inti ma jispeċifikawx il-programmer
dak din il-funzjoni prospetti.

337
00:15:17,680 --> 00:15:20,490
Int tkun trid fil-fatt tfittex
lejn il-kodiċi li figura li out.

338
00:15:20,490 --> 00:15:22,670
Jew aqra l-kummenti
jew id-dokumentazzjoni.

339
00:15:22,670 --> 00:15:24,870
Allura pluses u minuses ta '
dawn it-tipi ta 'deċiżjonijiet.

340
00:15:24,870 --> 00:15:26,750
Imma jien ngħid
l-kelma ewlenija, il-funzjoni.

341
00:15:26,750 --> 00:15:28,360
U meta nitgħallmu
JavaScript fi ftit ġimgħat

342
00:15:28,360 --> 00:15:31,026
aħna qed tmur biex tara l-istess ħaġa
darb'oħra, imma hija l-istess idea.

343
00:15:31,026 --> 00:15:34,220
L-isem tal-funzjoni, l-argument tagħha
jew argumenti jew in-nuqqas tiegħu, u issa

344
00:15:34,220 --> 00:15:35,630
hawnhekk huwa l-implimentazzjoni.

345
00:15:35,630 --> 00:15:38,860
>> Hekk jien se taqtgħu xi kantunieri biss
li jkun drammatika għal ftit mument.

346
00:15:38,860 --> 00:15:40,485
Imma jien ser jimxi 'l quddiem u jgħidu dan.

347
00:15:40,485 --> 00:15:44,890
Dan huwa kif I tista 'tagħbija
fajl fi array.

348
00:15:44,890 --> 00:15:47,580
Hemm funzjoni fil-PHP imsejħa fajl.

349
00:15:47,580 --> 00:15:49,300
Inti idejn l-isem ta 'fajl.

350
00:15:49,300 --> 00:15:53,950
Hija idejn inti lura firxa, ġewwa
li huwa kull linja mill-fajl.

351
00:15:53,950 --> 00:15:56,480
Minn żero, wieħed, fuq up
li n minus 1 linji.

352
00:15:56,480 --> 00:15:57,210
Dak it, id-dritt?

353
00:15:57,210 --> 00:15:57,990
M'hemm l-ebda f jaqra.

354
00:15:57,990 --> 00:15:58,826
M'hemm l-ebda f get s.

355
00:15:58,826 --> 00:15:59,700
M'hemm l-ebda mija s.

356
00:15:59,700 --> 00:16:00,420
M'hemm l-ebda ras.

357
00:16:00,420 --> 00:16:01,220
M'hemm l-ebda feof.

358
00:16:01,220 --> 00:16:03,950
Kollha ta 'li Jittieħed magħhom
inti kont qed lotta forsi,

359
00:16:03,950 --> 00:16:06,550
bil-p stabbiliti erba 'u ħames, tmur bogħod.

360
00:16:06,550 --> 00:16:09,450
>> So I aqra biss dawk il-linji fl
il-fajl, u mbagħad inti taf liema?

361
00:16:09,450 --> 00:16:15,510
Jekk irrid jtenni fuq dawn il-kliem,
I tista 'tagħmel, għal kull mudell tal-linja.

362
00:16:15,510 --> 00:16:19,992
Ftakar li dan kien it-tip ta 'għaqlija
Mod ta mtennija fuq firxa, l-indiċi

363
00:16:19,992 --> 00:16:25,090
billi indiċi, u fuq kull sejħa iterazzjoni
l-linja attwali, linja sinjal dollaru.

364
00:16:25,090 --> 00:16:31,560
U dritt hawn jien se jmorru u
jgħidu tabella, parentesi, linja, gets veru.

365
00:16:31,560 --> 00:16:35,880
>> Fi kliem ieħor, dan huwa kif I
ddaħħal fil tabella hash tiegħi fil-PHP.

366
00:16:35,880 --> 00:16:38,740
I say tabella sinjal dollaru, li
huwa array assoċjattiva tiegħi li kien

367
00:16:38,740 --> 00:16:40,690
vojta Skond il-linja tal-kodiċi up hawn fuq.

368
00:16:40,690 --> 00:16:42,790
I imbagħad indiċi fih
le, użu ta 'numru,

369
00:16:42,790 --> 00:16:45,300
iżda litteralment użu tal-
keyword li I care about.

370
00:16:45,300 --> 00:16:47,730
Forsi huwa tuffieħ jew lanġas
jew banana jew kwalunkwe,

371
00:16:47,730 --> 00:16:51,645
imma speċifikament jien indiċjar
fis dan bħal I proposti aktar kmieni.

372
00:16:51,645 --> 00:16:53,770
I jieħdu l-isem ta 'tiegħi
firxa assoċjattiva, u mbagħad I

373
00:16:53,770 --> 00:16:56,450
użu unquote kwotazzjoni fil-
parentesi kwadri bi string,

374
00:16:56,450 --> 00:16:58,490
minflok ta 'numru attwali.

375
00:16:58,490 --> 00:17:00,250
>> U għalhekk li hu.

376
00:17:00,250 --> 00:17:01,720
Il-funzjoni tat-tagħbija isir.

377
00:17:01,720 --> 00:17:05,119
Ladarba li ttenni loop, stajt jitqiegħdu
kollox fit-tabella hash.

378
00:17:05,119 --> 00:17:07,810
Issa disclaimer żgħar, hemm
affarijiet ftit I do bżonn biex jiffissaw.

379
00:17:07,810 --> 00:17:10,030
U l-verżjoni I ser post online
se jkollhom kollha tal-sfumaturi,

380
00:17:10,030 --> 00:17:12,670
imma hija aktar biss se jkun hemm xi
iċċekkjar żball u xi tweaks minuri.

381
00:17:12,670 --> 00:17:14,044
Imma dak li tabilħaqq l-gist ta 'dan.

382
00:17:14,044 --> 00:17:16,750
Jekk I issa jridu jiġu implimentati
il-funzjoni msejħa

383
00:17:16,750 --> 00:17:19,869
jivverifikaw, li jistenna
kelma bħala argument tagħha,

384
00:17:19,869 --> 00:17:22,099
kif jista I tmur dwar kif isir dan?

385
00:17:22,099 --> 00:17:30,020
Well, jien sempliċiment se ngħid, jekk
ġewwa tal-mejda tiegħi, fil-kelma post,

386
00:17:30,020 --> 00:17:30,652
jekk huwa stabbilit.

387
00:17:30,652 --> 00:17:32,360
Sabiex jekk ikun hemm is--
fil-fatt, inti taf liema?

388
00:17:32,360 --> 00:17:34,830
Jien ser tagħmel dan fil
daqsxejn ta 'pseudocode.

389
00:17:34,830 --> 00:17:36,020
Imma l-idea hija l-istess.

390
00:17:36,020 --> 00:17:41,640
Jekk dik ugwali veru, ritorn veru.

391
00:17:41,640 --> 00:17:43,890
Kull dritt.

392
00:17:43,890 --> 00:17:46,851
Else-- inti tista tip ta 'tara fejn
dan huwa going-- li jirritornaw falza.

393
00:17:46,851 --> 00:17:47,350
Jsir.

394
00:17:47,350 --> 00:17:49,640
Iċċekkja isir.

395
00:17:49,640 --> 00:17:50,940
>> Pretty sbieħ, right?

396
00:17:50,940 --> 00:17:52,560
U għalhekk dak li huwa dan verament jkollna fi?

397
00:17:52,560 --> 00:17:53,680
U dan ukoll, I cut xi kantunieri.

398
00:17:53,680 --> 00:17:56,020
Ħares lejn il-verżjoni online
għal kulħadd ta 'l-sfumaturi żgħar.

399
00:17:56,020 --> 00:17:57,103
Imma dak li l-gist ta 'dan.

400
00:17:57,103 --> 00:17:59,080
Indiċi fis tiegħek
firxa assoċjattiva, a.k.a.

401
00:17:59,080 --> 00:18:02,910
Tabella Hash, ara jekk hemm valur
hemm, jekk huwa stabbilit li veru, u jekk iva,

402
00:18:02,910 --> 00:18:03,930
ritorn veru.

403
00:18:03,930 --> 00:18:05,819
Allura konna fadal
kollha tal-kumplessità.

404
00:18:05,819 --> 00:18:07,110
Allura tip tal-moħħ blowing, right?

405
00:18:07,110 --> 00:18:09,680
I mhux se jolqot irfinar bl jħottu,
għaliex fil fact-- oh, inti taf liema?

406
00:18:09,680 --> 00:18:11,620
Yeah, ejja finitura ma jħottu.

407
00:18:11,620 --> 00:18:18,940
>> Jħottu f'tabella hash tista 'tidher
bħal jħottu funzjoni, ritorn.

408
00:18:18,940 --> 00:18:19,930
OK b'tali mod li jħottu.

409
00:18:19,930 --> 00:18:21,350
Għaliex hemm xejn
li jħottu, id-dritt?

410
00:18:21,350 --> 00:18:22,170
M'hemm l-ebda malloc.

411
00:18:22,170 --> 00:18:24,280
I ma tistaqsix espressament l
sistema operattiva għal xejn.

412
00:18:24,280 --> 00:18:25,571
I biss bdew jużaw varjabbli.

413
00:18:25,571 --> 00:18:30,510
U għalhekk dan ukoll huwa manifestazzjoni ta '
karatteristiċi ta 'lingwi ta' livell ogħla.

414
00:18:30,510 --> 00:18:32,940
Għalhekk għal darb'oħra, ħafna mill dan it-terminu
aħna kont qed jittrattaw stabbiliti hawn

415
00:18:32,940 --> 00:18:34,280
bil C. livell Super baxx.

416
00:18:34,280 --> 00:18:35,980
Tista 'tara memorja tal-kompjuter.

417
00:18:35,980 --> 00:18:38,440
Inti tista 'tmiss xi ħaġa li
trid fil RAM kompjuter tiegħek,

418
00:18:38,440 --> 00:18:39,440
għall-aħjar jew għall-agħar.

419
00:18:39,440 --> 00:18:41,760
>> Up hawn, aħna qed tmur
li jċedu dak il-poter.

420
00:18:41,760 --> 00:18:44,730
Iżda god tiegħi, ħarsa kif
ħafna inqas kodiċi I kiteb.

421
00:18:44,730 --> 00:18:47,660
Fil-fatt jekk jien kienu jitkellem ma
u titkellem fuq ittajpjar tiegħi,

422
00:18:47,660 --> 00:18:50,190
aħna kieku sar ma
F'dan l-eżempju ħames minuti ilu.

423
00:18:50,190 --> 00:18:52,150
Allura x'inhu l-prezz imħallas?

424
00:18:52,150 --> 00:18:54,100
Well ejja tagħti ħarsa.

425
00:18:54,100 --> 00:18:55,340
Ejja tagħti ħarsa.

426
00:18:55,340 --> 00:18:59,340
Jien ser jimxi 'l quddiem u run CS50.

427
00:18:59,340 --> 00:19:02,160
Let me ewwel jidħlu fid
Eżempji lum fejn

428
00:19:02,160 --> 00:19:03,970
Għandi l-direttorju testi bħal qabel.

429
00:19:03,970 --> 00:19:08,520
Jien ser imexxu s-soluzzjoni li
niġu ma 'problema stabbiliti ħamsa imsejħa

430
00:19:08,520 --> 00:19:11,190
speller, li huwa fil-kont CS50 s.

431
00:19:11,190 --> 00:19:14,040
>> U jien ser jimxu fuq xi ħaġa
big bħall-king James bibbja,

432
00:19:14,040 --> 00:19:16,547
biss sabiex inkunu verament tpoġġi l-
soluzzjonijiet persunal għall-test.

433
00:19:16,547 --> 00:19:19,130
Issa xi kultant l-internet huwa a
ftit aktar bil-mod, ftit aktar mgħaġġel,

434
00:19:19,130 --> 00:19:20,338
jista 'jieħu waqt li tiskrollja.

435
00:19:20,338 --> 00:19:23,730
Iżda hija ħadet total ta '.56 sekondi
li jespliċitaw jiċċekkja l-James King

436
00:19:23,730 --> 00:19:25,150
Bibbja tintuża s-soluzzjoni tal-persunal.

437
00:19:25,150 --> 00:19:25,620
So pretty tajba.

438
00:19:25,620 --> 00:19:27,786
Dejjem jista 'jkun ħafna aktar kajman,
u li l-totalment multa.

439
00:19:27,786 --> 00:19:30,090
Iżda huwa korrett hawnhekk.

440
00:19:30,090 --> 00:19:32,440
Allura dak is-soluzzjoni tal-persunal.

441
00:19:32,440 --> 00:19:34,785
Jekk immur fi u tnaddaf il-verżjoni PHP.

442
00:19:34,785 --> 00:19:36,990
U jien se jagħmlu ftit
bħal baking juru ħaġa.

443
00:19:36,990 --> 00:19:39,720
Aħna qed tmur biex tieħu l-kodiċi I kiteb
qabel, dan huwa perfettament korretta.

444
00:19:39,720 --> 00:19:42,678
Minħabba l-kodiċi I kiteb mhix se
li jkun perfettament korretta heure.

445
00:19:42,678 --> 00:19:47,310
Imma jekk I run-verżjoni PHP,
dak li I għandhom jagħtu up illum?

446
00:19:47,310 --> 00:19:49,980
Domt ħames minuti biex
jimplimentaw p stabbiliti ħamsa, I jitolbu.

447
00:19:49,980 --> 00:19:51,770
Liema prezz ikunu I mħallsa?

448
00:19:51,770 --> 00:19:52,270
Yeah.

449
00:19:52,270 --> 00:19:52,937
>> UDJENZA: Veloċità.

450
00:19:52,937 --> 00:19:53,645
SPEAKER 1: Veloċità.

451
00:19:53,645 --> 00:19:54,380
Xi trid tfisser?

452
00:19:54,380 --> 00:19:55,230
>> UDJENZA: Huwa ser jieħu aktar żmien.

453
00:19:55,230 --> 00:19:55,660
>> SPEAKER 1: Id-dritt.

454
00:19:55,660 --> 00:19:56,160
Ejja naraw.

455
00:19:56,160 --> 00:19:59,590
Huwa ser jieħu aktar żmien,
mhux li tikteb, iżda għall-run.

456
00:19:59,590 --> 00:20:00,090
Yeah.

457
00:20:00,090 --> 00:20:00,960
Mela ejja ipprova din.

458
00:20:00,960 --> 00:20:05,720
So here jien ser jimxi 'l quddiem u jagħmlu
PHP ta speller, u minħabba li l-file

459
00:20:05,720 --> 00:20:06,360
imsejħa speller.

460
00:20:06,360 --> 00:20:07,580
Hekk jien ma tkunx qed taħdem il-
dizzjunarju, irtirar,

461
00:20:07,580 --> 00:20:09,204
Niġri-programm imsejjaħ speller.

462
00:20:09,204 --> 00:20:12,450
Jien ser jgħaddu fl-istess
fajl, King James il-ħames.

463
00:20:12,450 --> 00:20:14,377
Huwa jtiru bil.

464
00:20:14,377 --> 00:20:17,210
Dan jista 'jkun biss veloċità internet,
sabiex ma taqra wisq f'dak.

465
00:20:17,210 --> 00:20:21,680
Iżda dan ma jħossu itwal għal dubju.

466
00:20:21,680 --> 00:20:23,280
1.26 sekondi.

467
00:20:23,280 --> 00:20:25,150
>> Issa li għadu pretty
kkritikat fast, id-dritt?

468
00:20:25,150 --> 00:20:28,140
U l-unika raġuni li qisni
aktar simili tlieta, jew erba ', jew ħames

469
00:20:28,140 --> 00:20:30,515
sekondi, li jinsab biss minħabba
l-internet kien li bil-mod.

470
00:20:30,515 --> 00:20:33,980
Il-ħin mgħoddi kompjuter kien 1.26
sekondi, versus naħseb 0.56.

471
00:20:33,980 --> 00:20:35,880
Allura aktar minn darbtejn bil-mod.

472
00:20:35,880 --> 00:20:39,170
Issa li għadu pretty darn
mgħaġġel, imma hija manifestazzjoni

473
00:20:39,170 --> 00:20:40,860
ta ', tabilħaqq, dak il-prezz eżatt.

474
00:20:40,860 --> 00:20:43,460
>> Għaliex aħna qed interpretazzjoni
fil-linja kodiċi minn linja,

475
00:20:43,460 --> 00:20:46,740
u li PHP programm huwa qari tiegħi
kodiċi fuq għal isfel, xellug għal-lemin,

476
00:20:46,740 --> 00:20:47,940
dan għandha tagħmel aktar ħsieb.

477
00:20:47,940 --> 00:20:50,430
Għandu tip ta jikkonvertu
ġewwa fih innifsu

478
00:20:50,430 --> 00:20:53,464
għall-magna korrispondenti
kodiċi fuq il-fly, biex ngħidu hekk,

479
00:20:53,464 --> 00:20:55,380
anki jekk il-mekkaniżmi
huma daqsxejn differenti.

480
00:20:55,380 --> 00:20:59,430
Minflok sempliċiment għalf għall-
Intel CPU l-żerijiet prima u dawk

481
00:20:59,430 --> 00:21:00,930
li jifhem natively.

482
00:21:00,930 --> 00:21:04,110
>> Allura assolutament, fl-idejn,
aħna ħallas prezz.

483
00:21:04,110 --> 00:21:09,120
U l-kodiċi miktub f'lingwa
bħal PHP tendenza li jkun aktar bil-mod.

484
00:21:09,120 --> 00:21:10,050
Iżda god tiegħi.

485
00:21:10,050 --> 00:21:12,740
Allura issa meta I jespliċitaw check tiegħi
fajl, I jonfqu extra 0.7

486
00:21:12,740 --> 00:21:17,280
jew hekk sekondi vs 20 siegħa biex jimplimentaw
aktar mgħaġġla jespliċitaw kontrollur, right?

487
00:21:17,280 --> 00:21:18,397
Huwa tip ta 'kummerċ off.

488
00:21:18,397 --> 00:21:20,980
U jekk int kemm bdew p
sett ħames, ma jista 'jkun ta' 20 siegħa.

489
00:21:20,980 --> 00:21:22,188
Jista 'jkun ferm inqas minn dak.

490
00:21:22,188 --> 00:21:23,600
Imma hija trade off, għall reali.

491
00:21:23,600 --> 00:21:27,820
U jekk int taħdem kodiċi fuq verament kbir
settijiet ta 'data, jew fuq il-hardware saħansitra anzjani,

492
00:21:27,820 --> 00:21:32,650
dawk it-tipi ta 'differenzi
tista 'ċertament żid up.

493
00:21:32,650 --> 00:21:34,880
>> Kwalunkwe mistoqsijiet s'issa?

494
00:21:34,880 --> 00:21:35,617
Yeah.

495
00:21:35,617 --> 00:21:36,492
>> UDJENZA: [inaudible]

496
00:21:36,492 --> 00:21:38,187

497
00:21:38,187 --> 00:21:39,978
SPEAKER 1: Jiddispjacini, tista
inti jgħidu li darba aktar?

498
00:21:39,978 --> 00:21:40,853
UDJENZA: [inaudible]

499
00:21:40,853 --> 00:21:43,326

500
00:21:43,326 --> 00:21:44,700
SPEAKER 1: Inti qed tagħti up ħin.

501
00:21:44,700 --> 00:21:45,283
Well, hekk yeah.

502
00:21:45,283 --> 00:21:47,322
Inti iffrankar ħin billi
ma jkollhomx li josservawha,

503
00:21:47,322 --> 00:21:48,530
jekk dan huwa dak li qed titlob.

504
00:21:48,530 --> 00:21:50,710
U fil-fatt, fil CS50,
maġġoranza tal-programmi,

505
00:21:50,710 --> 00:21:53,668
anke jekk dawn jistgħu jieħu waqt
jiktbu, dawn qed relattivament qasir.

506
00:21:53,668 --> 00:21:56,860
Tużżana ftit, ftit mijiet linji ta 'kodiċi,
u għalhekk huma jiġbru pretty malajr.

507
00:21:56,860 --> 00:21:58,470
Imma meta tibda
miktub programmi akbar,

508
00:21:58,470 --> 00:22:01,511
bħal jekk int Microsoft jew int
Google u kitba programmi verament kbir

509
00:22:01,511 --> 00:22:05,360
fis-C, jew C ++, jew ikkompilati b'mod simili
lingwi, tista 'tieħu ħafna sekondi,

510
00:22:05,360 --> 00:22:08,577
jew saħansitra minuti jew itwal għal
jikkompilaw miljuni ta 'linji ta' kodiċi.

511
00:22:08,577 --> 00:22:10,660
U hemm wisq, li
differenza se jammontaw.

512
00:22:10,660 --> 00:22:12,840
>> U fil-fatt, ladarba aħna
tranżizzjoni illum, dakinhar stess

513
00:22:12,840 --> 00:22:15,910
illum, l-ipprogrammar web
użu PHP, int

514
00:22:15,910 --> 00:22:18,460
se jsibuha biss tant
aktar pleasurable li jikteb il-kodiċi

515
00:22:18,460 --> 00:22:21,501
meta inti ma għandekx tagħmel dawn stupid
passi bħal bidla terminal tiegħek

516
00:22:21,501 --> 00:22:24,202
tieqa, tip make hello, ri
run, rikarigu-tieqa.

517
00:22:24,202 --> 00:22:25,910
Just tant stupid
miżuri mekkaniċi li

518
00:22:25,910 --> 00:22:28,480
biss jiksbu fil-mod ta 'kif isir
l-interessanti, il-ħidma gost.

519
00:22:28,480 --> 00:22:31,450
U fil-fatt aħna tarmi li bogħod ma PHP.

520
00:22:31,450 --> 00:22:34,960
U nistgħu jinteraġixxu
magħha aktar malajr.

521
00:22:34,960 --> 00:22:35,495
Yeah.

522
00:22:35,495 --> 00:22:36,370
UDJENZA: [inaudible]

523
00:22:36,370 --> 00:22:40,294

524
00:22:40,294 --> 00:22:40,960
SPEAKER 1: Sure.

525
00:22:40,960 --> 00:22:42,876
Nista tiċċara dak li
tfisser jiġi interpretat?

526
00:22:42,876 --> 00:22:45,870
Meta inti tiġbor lingwa
bħal C, jinżel

527
00:22:45,870 --> 00:22:48,140
kif għidna għall-magna
kodiċi, żerijiet u dawk.

528
00:22:48,140 --> 00:22:51,860
U Intel iddeċieda snin ilu li
ċerti mudelli ta 'żero u dawk

529
00:22:51,860 --> 00:22:56,220
jirrappreżentaw minn hekk, jew bit-tnaqqis,
jew stampata, jew operazzjonijiet bażiċi oħra.

530
00:22:56,220 --> 00:23:00,250
Fid-dinja ta 'lingwa interpretat
bħal PHP, jew JavaScript, jew Python,

531
00:23:00,250 --> 00:23:03,120
jew Ruby, jew għenieqed ta '
oħrajn, minflok xi ħadd

532
00:23:03,120 --> 00:23:05,120
l kitbet
interpreter-- f'dan il-każ,

533
00:23:05,120 --> 00:23:09,770
huwa wkoll imsejjaħ PHP, identiku għall-
isem tal-language-- li essenzjalment

534
00:23:09,770 --> 00:23:13,840
għandha loop kbir fiha li ttenni
fuq kollha tal-linji tal-kodiċi

535
00:23:13,840 --> 00:23:18,170
li I għalf bħala input, bħal bonjour
dot PHP, jew dot dizzjunarju PHP.

536
00:23:18,170 --> 00:23:21,760
>> U allura inti tista 'taħseb big tagħhom
loop bħala li jkollhom ħafna ta 'kundizzjonijiet.

537
00:23:21,760 --> 00:23:26,340
U dawk il-kondizzjonijiet jiġifieri, jekk il-
bniedem kiteb l-keyword għal,

538
00:23:26,340 --> 00:23:28,470
tibda tagħmel tiegħu jew tagħha
kodiċi ġdid u għal darb'oħra.

539
00:23:28,470 --> 00:23:31,360
Jew jekk il-bniedem għandu
miktub il-linja ta 'kodiċi,

540
00:23:31,360 --> 00:23:34,880
jekk, jesegwixxu tagħhom biss
linja li jmiss kondizzjonalment.

541
00:23:34,880 --> 00:23:37,740
Allura huwa verament simili interpretazzjoni
dan f'sens bniedem, linja

542
00:23:37,740 --> 00:23:39,660
billi line, u li biss jieħu ż-żmien.

543
00:23:39,660 --> 00:23:41,340
Huwa jieħu overhead.

544
00:23:41,340 --> 00:23:44,189
U hekk li l-price--
tajba question-- nħallsu.

545
00:23:44,189 --> 00:23:46,480
Mela ejja tagħmel demo ieħor
li l-ftit aktar drammatika.

546
00:23:46,480 --> 00:23:51,160
Hemm, Id jgħidu, ballpark dan fil
probabbiltà 90% ta 'nuqqas horribly,

547
00:23:51,160 --> 00:23:53,869
imma inti tkun étonné
bi probabbiltà 10%.

548
00:23:53,869 --> 00:23:55,660
Allura kull sena nippruvaw
biex jagħmlu dan, fejn aħna

549
00:23:55,660 --> 00:23:59,061
tipprova tikteb programm li jgħaddi minnu
problema stabbiliti żero, li għalihom inti stajt

550
00:23:59,061 --> 00:24:02,060
imressqa numri tat-telefon tiegħek u
ħafna ta 'informazzjoni demografika oħra,

551
00:24:02,060 --> 00:24:06,030
u aħna programmatically
inti tibgħat messaġġ test.

552
00:24:06,030 --> 00:24:08,540
U mbagħad telefon kulħadd
jibda beeping jew jivvibraw,

553
00:24:08,540 --> 00:24:11,460
u huwa biss aqwa, minħabba
ukoll, tħares lejn dak kompjuters tista 'tagħmel.

554
00:24:11,460 --> 00:24:13,840
>> Dan rarament xogħlijiet b'mod korrett
jidher, fil-parti kbira

555
00:24:13,840 --> 00:24:16,800
minħabba I tipikament nikseb lista sewda
billi Gmail jew xi servizz ieħor

556
00:24:16,800 --> 00:24:19,630
għall-fatt tipprova tagħmel dan fuq skala.

557
00:24:19,630 --> 00:24:24,940
Iżda ħaġa umoristiċi hija wisq, peress li aħna
ma jkollhomx kulħadd hawn illum,

558
00:24:24,940 --> 00:24:27,690
fatt gost l-aħħar darba aħna
ppruvaw din sentejn ilu,

559
00:24:27,690 --> 00:24:30,870
I think I kiteb programm
li sib fil mtennija loop

560
00:24:30,870 --> 00:24:34,040
f'idejh id-istudenti fil-klassi,
u kull wieħed minnhom messaġġ,

561
00:24:34,040 --> 00:24:37,534
u qal xi ħaġa simili,
għaliex mhumiex inti fil lecture?

562
00:24:37,534 --> 00:24:39,170
Imħabba, CS50 bot.

563
00:24:39,170 --> 00:24:42,580
>> Inti għandek l-ebda idea kif ħafna apologetic
u emails tip ta 'uġigħ

564
00:24:42,580 --> 00:24:46,970
Stajt riċevuti bi tweġiba mill-
n minus 100 persuna li ma kinux hawn

565
00:24:46,970 --> 00:24:47,960
dik il-ġurnata.

566
00:24:47,960 --> 00:24:52,116
U anki funnier, story-- aktar shameful
tafu, ejja poġġih hemmhekk.

567
00:24:52,116 --> 00:24:53,740
Huwa diġà fuq video ftit snin lura.

568
00:24:53,740 --> 00:24:56,810
Allura inti dalwaqt se tara lili
jiktbu għall loop, fejn

569
00:24:56,810 --> 00:25:00,640
huwa faċli ħafna li jiktbu bug f'dak
għal loop, sabiex l-ewwel darba

570
00:25:00,640 --> 00:25:02,800
permezz tal-linja, inti
tibgħat il-messaġġ f'test.

571
00:25:02,800 --> 00:25:06,190
>> It-tieni darba min-loop I
għandhom bagħtu waħda aktar messaġġ,

572
00:25:06,190 --> 00:25:08,250
u mbagħad wieħed test aktar
messaġġ, u wieħed aktar.

573
00:25:08,250 --> 00:25:11,490
Iżda jirriżulta jekk inti tagħmel typo
meta jipprogrammaw, xi kultant inti

574
00:25:11,490 --> 00:25:14,460
jistgħu jiktbu programmi li jibagħtu lil
messaġġ, allura żewġ messaġġi,

575
00:25:14,460 --> 00:25:18,742
mbagħad tliet messaġġi għal kulħadd
li li diġà rċevew messaġġ.

576
00:25:18,742 --> 00:25:21,450
U kif tafu, tagħmel xi ħaġa,
plus xi ħaġa, plus xi ħaġa,

577
00:25:21,450 --> 00:25:25,910
plus xi ħaġa, huwa O kbira ta 'lott
ta messaġġi, jew n kwadrat,

578
00:25:25,910 --> 00:25:29,830
jew fil $ 0.10 messaġġ, $ 20,000.

579
00:25:29,830 --> 00:25:33,700
>> B'xorti tajba I hit Control-C qabel li
ġara, imma jien nirrispettaw inqas wieħed

580
00:25:33,700 --> 00:25:37,550
tal-predeċessuri tiegħek $ 20 għall-
200 xi messaġġi fard li,

581
00:25:37,550 --> 00:25:40,450
mhux biss marru għall-telefon tiegħu, iżda
wkoll li kien jixtieq telefon flip anzjani

582
00:25:40,450 --> 00:25:43,520
għalhekk simili imbuttata 'l barra mill tiegħu
memorja kull test personali oħra

583
00:25:43,520 --> 00:25:45,930
messaġġ kien fil-fatt gotten.

584
00:25:45,930 --> 00:25:49,250
Allura aħna għandna għan wieħed
illum, ma tagħmel dan.

585
00:25:49,250 --> 00:25:50,620
Forsi jduru fuq modalità ajruplan.

586
00:25:50,620 --> 00:25:51,120
Kull dritt.

587
00:25:51,120 --> 00:25:56,590
Mela ejja jmorru fi
programm hawn callled--

588
00:25:56,590 --> 00:25:59,060
li jiena ser sejħa test dot PHP.

589
00:25:59,060 --> 00:26:01,074
U minn qabel, stajt ltqajna żewġ fajls hawn.

590
00:26:01,074 --> 00:26:06,030
I magħmula fajl għal ftit persunal, li ltqajna
kollha info tal-persunal, l-ismijiet

591
00:26:06,030 --> 00:26:07,260
mill-websajt tal-kors ta.

592
00:26:07,260 --> 00:26:09,756
U mbagħad għal issa I biss jitqiegħed
xi numri foloz 555-1212.

593
00:26:09,756 --> 00:26:11,380
Allura dawn ma kien imur kullimkien.

594
00:26:11,380 --> 00:26:15,140
Iżda avviż-ġewwa ta 'dan il-fajl CSV,
li tkellimna dwar qosor qabel

595
00:26:15,140 --> 00:26:16,540
fil-kuntest tal-fajl IO.

596
00:26:16,540 --> 00:26:18,730
>> X'hemm fajl CSV?

597
00:26:18,730 --> 00:26:19,970
Comma separati varjabbli.

598
00:26:19,970 --> 00:26:24,400
U dan huwa tip simili ta 'ħafna
database ħfief, jekk inti se.

599
00:26:24,400 --> 00:26:28,650
Hemm tip ta 'tip ta' erba 'kolonni
f'dan il-fajl, u hemm jagged,

600
00:26:28,650 --> 00:26:32,400
iżda l-virgoli essenzjalment
jirrappreżentaw kolonni fil-fajl.

601
00:26:32,400 --> 00:26:35,400
L-ewwel kolonna hija l-TF jew l-isem CA.

602
00:26:35,400 --> 00:26:37,800
Tieni kolonna hija l-aħħar isem tagħhom.

603
00:26:37,800 --> 00:26:39,820
Tielet kolonna huwa numru tat-telefon tagħhom.

604
00:26:39,820 --> 00:26:44,760
U raba 'kolonna apparentement is--
raba 'kolonna hija apparentement liema?

605
00:26:44,760 --> 00:26:45,870
OK, dan huwa trasportatur tagħhom.

606
00:26:45,870 --> 00:26:47,180
Allura Verizon, Sprint jew, jew dak li mhux.

607
00:26:47,180 --> 00:26:48,620
U jekk jien misspoke qabel, CSV.

608
00:26:48,620 --> 00:26:51,800
Comma separati valuri huwa CSV hawn.

609
00:26:51,800 --> 00:26:54,260
>> Allura x'nista 'nagħmel ma' dan?

610
00:26:54,260 --> 00:26:56,940
Ukoll dan huwa biss fajl test big,
u huwa tip ta 'twil, id-dritt?

611
00:26:56,940 --> 00:26:58,690
Bħal dan se
jkun it-tip ta 'annoying.

612
00:26:58,690 --> 00:27:03,510
U jirriżulta li, għalkemm, li jekk I
trid tibgħat messaġġ lil, ejja

613
00:27:03,510 --> 00:27:05,180
jgħidu Alex hawn.

614
00:27:05,180 --> 00:27:09,690
Let me jmorru fil-browser tiegħi
u joħroġ mil-modalità full screen

615
00:27:09,690 --> 00:27:11,660
biss hekk I tista 'toggle quddiem u lura.

616
00:27:11,660 --> 00:27:20,280
Jirriżulta, ejja ara, jekk immur fil
hawn, u log fis Gmail, id-dritt.

617
00:27:20,280 --> 00:27:22,950
Ma nħarsu lejn din il-parti.

618
00:27:22,950 --> 00:27:23,880
Just nasal biex tara.

619
00:27:23,880 --> 00:27:26,551

620
00:27:26,551 --> 00:27:28,800
naturalment il-livestream jista
xorta tara dak li qed nagħmel.

621
00:27:28,800 --> 00:27:29,360
Kull dritt.

622
00:27:29,360 --> 00:27:31,850
>> Allura hawnhekk huwa biss Gmail ma
Kont John Harvard.

623
00:27:31,850 --> 00:27:34,000
Mela jekk jien tixtieq li tibgħat
messaġġ lil Alex,

624
00:27:34,000 --> 00:27:35,530
I tista 'kors compose messaġġ.

625
00:27:35,530 --> 00:27:38,410
U jirriżulta li, u stajt
ttestjati bl Alex qabel hawnhekk,

626
00:27:38,410 --> 00:27:42,260
sabiex inti tista 'tehmeż domain ċerta
isem għal numri tat-telefon tan-nies,

627
00:27:42,260 --> 00:27:45,850
għaliex teżisti fid-dinja
affarijiet imsejħa SMS email gateways.

628
00:27:45,850 --> 00:27:50,000
Liema huwa mod fancy ta 'tgħid kollha
minna li mowbajls li

629
00:27:50,000 --> 00:27:53,200
jkollhom numri tat-telefon, naturalment,
hemm probabbilment għall trasportatur tiegħek,

630
00:27:53,200 --> 00:27:56,840
ċertu suffiss bħal fil
Vtext.com għall messaġġ Verizon

631
00:27:56,840 --> 00:28:00,320
dot com, li inti tista 'tehmeż biex tiegħek
stess numru tat-telefon personali, u mbagħad

632
00:28:00,320 --> 00:28:03,540
inti jew ħbieb, jew il-ġenituri tiegħek jista
test inti f'dak l-indirizz partikolari.

633
00:28:03,540 --> 00:28:07,380
>> U Verizon għandha server, email
server, li malli tirċievi din l-email,

634
00:28:07,380 --> 00:28:11,180
iħares lejn il-parti numerika u mbagħad
użi ikun x'ikun magic industrija speċjali

635
00:28:11,180 --> 00:28:14,540
huma għandhom fil-fatt tibgħat it out fuq
il-frekwenzi radjuteleviżivi għall cell partikolari tiegħek

636
00:28:14,540 --> 00:28:15,040
telefon.

637
00:28:15,040 --> 00:28:18,030
Issa dan huwa sbieħ għaliex I ma
verament jafu kif tibgħat messaġġ test

638
00:28:18,030 --> 00:28:20,460
jew li jikteb il-kodiċi għadhom
għall-mowbajl tiegħi,

639
00:28:20,460 --> 00:28:23,580
u inti tista 'tagħmel eżattament dan għal
proġett finali, iżda għal issa kollha

640
00:28:23,580 --> 00:28:24,770
Għandi hija laptop tiegħi hawn.

641
00:28:24,770 --> 00:28:29,830
So I jridu jtenni matul dak CSV
fajl, linja, b'linja, minn linja, bil-linja,

642
00:28:29,830 --> 00:28:35,160
grab kull wieħed mill-numri tal-persunal tat-telefon,
u trasportatur tagħhom u programatically,

643
00:28:35,160 --> 00:28:39,770
concatenate, jiġifieri, qabbad it-telefon
Numru bl-isem tad-dominju xierqa

644
00:28:39,770 --> 00:28:40,820
u mbagħad ibgħat email.

645
00:28:40,820 --> 00:28:41,940
>> Allura li l-lott ta 'passi.

646
00:28:41,940 --> 00:28:45,530
U Xorti tajba tagħmel dan fil C.
Huwa ħmarillejl ta 'sitwazzjoni

647
00:28:45,530 --> 00:28:48,350
li jiftaħ fajl, biex taqraha
linja, billi linja, bil-linja, kif inti

648
00:28:48,350 --> 00:28:51,100
qed jesperjenza, jew jistgħu hekk ara
bil-problema stabbiliti ħamsa, jekk mhux

649
00:28:51,100 --> 00:28:53,560
problema sett erba, u mbagħad
li dinamikament concatenate

650
00:28:53,560 --> 00:28:57,020
żewġ kordi flimkien, għaliex fil C,
li jieħdu żewġ kordi u għaqqadhom,

651
00:28:57,020 --> 00:29:00,900
liema do inti minimament
bżonn tagħmel aktar probabbli?

652
00:29:00,900 --> 00:29:03,020
Ikollok bżonn li tiddikjara memorja aktar, id-dritt?

653
00:29:03,020 --> 00:29:04,710
U jistaqsi, malloc, jista 'jkolli memorja aktar?

654
00:29:04,710 --> 00:29:07,060
So I tista 'tpoġġi nofs dan
hawn, nofs dan hawn.

655
00:29:07,060 --> 00:29:08,150
Huwa biss hekk ħafna passi.

656
00:29:08,150 --> 00:29:10,310
U minn dak il-punt inti tilfu
interess fil-demo ftit stupid

657
00:29:10,310 --> 00:29:11,851
fejn inti tagħmel kulħadd telefon ħoss.

658
00:29:11,851 --> 00:29:14,590
Ejja nagħmlu dan it-tip ta 'PHP
stil, fejn aħna biss

659
00:29:14,590 --> 00:29:16,210
tibda tuża aktar ta 'dak sink tal-kċina.

660
00:29:16,210 --> 00:29:18,050
>> U l-ideat huma
fundamentalment l-istess,

661
00:29:18,050 --> 00:29:20,710
iżda aħna ma jkollhomx għalfejn tinkwieta wisq
ħafna dwar dak il-livell aktar baxx.

662
00:29:20,710 --> 00:29:22,950
Mela ejja ara kif I jista
tmur dwar kif isir dan.

663
00:29:22,950 --> 00:29:26,664
U biss sabiex I ma
irrepeti iżbalji tal-passat,

664
00:29:26,664 --> 00:29:28,330
Stajt bil-miktub xi noti għall myself hawn.

665
00:29:28,330 --> 00:29:31,070
U ejja ara jekk I jistgħu jimxu magħna
permezz xi wħud mill-passi fundamentali,

666
00:29:31,070 --> 00:29:33,861
u mbagħad għall-finijiet ħin ta Aħna ser
forsi tnaqqas xi kantunieri fl-aħħar.

667
00:29:33,861 --> 00:29:38,007
Jien ser jimxi 'l quddiem u jagħmlu miftuħa
PHP bracket biex tibda dan il-fajl.

668
00:29:38,007 --> 00:29:39,590
U jien ser jimxi 'l quddiem u jagħmlu dan.

669
00:29:39,590 --> 00:29:41,490
File manku, kif inti ser
hekk ara, fil-fatt

670
00:29:41,490 --> 00:29:44,790
jitlob funzjoni msejħa f miftuħ.

671
00:29:44,790 --> 00:29:46,280
U ftakar dan jiftaħ fajl.

672
00:29:46,280 --> 00:29:48,800
U l-kwotazzjoni, unquote,
r jfisser dak, għal darb'oħra?

673
00:29:48,800 --> 00:29:49,800
Just miftuħa għall tinqara.

674
00:29:49,800 --> 00:29:51,210
Issa fil-sett p, inti għamilt dan.

675
00:29:51,210 --> 00:29:54,500
U jimmaniġġjaw jista 'jvarja,
fu, bar, basso, kull isem varjabbli.

676
00:29:54,500 --> 00:29:57,470
Iżda ġeneralment kompjuter
xjentist kieku ssejjaħ fajl miftuħ,

677
00:29:57,470 --> 00:30:00,962
giving you fajl manku,
xi ħaġa li jżommu fuq biex ngħidu hekk.

678
00:30:00,962 --> 00:30:02,670
Jien biss se jagħmlu
xi żball iċċekkjar.

679
00:30:02,670 --> 00:30:07,260
Allura jekk il-manku hija falza, bħad
fis-C, jien ser tagħmel xi ħaġa simili,

680
00:30:07,260 --> 00:30:09,545
ma tista 'tiftaħ fajl, backslash n.

681
00:30:09,545 --> 00:30:11,420
U mbagħad jien biss se
li jimxi 'l quddiem u l-ħruġ.

682
00:30:11,420 --> 00:30:14,340
U jirriżulta li, fil-PHP,
Jien mhux ġewwa funzjoni.

683
00:30:14,340 --> 00:30:16,160
M'hemm l-ebda funzjoni prinċipali hawnhekk.

684
00:30:16,160 --> 00:30:17,450
So I ma jirritornawx, per se.

685
00:30:17,450 --> 00:30:18,120
I ħruġ.

686
00:30:18,120 --> 00:30:19,619
Li huwa essenzjalment l-istess ħaġa.

687
00:30:19,619 --> 00:30:22,510
U jien joħorġu ma 'y wieħed probabbilment.

688
00:30:22,510 --> 00:30:24,220
Wieħed ifisser biss żball ta 'xi tip.

689
00:30:24,220 --> 00:30:25,580
Huwa mhux żero, dan huwa żball.

690
00:30:25,580 --> 00:30:30,220
>> Kull dritt, hekk jekk jien stabbiliti hawn issa
fil-programm tiegħi I fetħu l-fajl.

691
00:30:30,220 --> 00:30:34,250
Jien ser jimxi 'l quddiem u jiddikjaraw
firxa imsejħa indirizzi,

692
00:30:34,250 --> 00:30:38,610
u C I jkollhom jafu l-
daqs tal-array bil-quddiem, id-dritt?

693
00:30:38,610 --> 00:30:41,910
Jew I bżonn li jiddikjara dan
huwa pointer, u mbagħad jużaw malloc.

694
00:30:41,910 --> 00:30:44,720
U mbagħad kull darba I taqra
permezz ringiela ieħor fil-fajl,

695
00:30:44,720 --> 00:30:46,620
Jien ser jeħtieġ li malloc
aktar memorja, memorja malloc aktar.

696
00:30:46,620 --> 00:30:47,703
Li l-uġigħ fl-għonq.

697
00:30:47,703 --> 00:30:50,950
U Thankfully, PHP, u Ruby,
u Python, u JavaScript, huma

698
00:30:50,950 --> 00:30:53,880
se jikbru arrays tiegħek
għalik awtomatikament.

699
00:30:53,880 --> 00:30:54,830
Nru malloc aktar.

700
00:30:54,830 --> 00:30:56,227
Nru aktar tmexxija memorja.

701
00:30:56,227 --> 00:30:57,560
Il-kompjuter jieħu ħsieb dan.

702
00:30:57,560 --> 00:31:00,330
Imma l-prezz li inti tħallas.

703
00:31:00,330 --> 00:31:01,350
Huwa ftit kajman.

704
00:31:01,350 --> 00:31:03,190
U għal programm bħal dan
aħna mhux qed tmur biex avviż.

705
00:31:03,190 --> 00:31:04,720
Aħna ser jibagħtu 100 messaġġ.

706
00:31:04,720 --> 00:31:06,136
Per eżempju mhux se tħossha.

707
00:31:06,136 --> 00:31:08,430
IT verament jibda biss għal
kwistjoni lingwa ta 'lgħażla tiegħek

708
00:31:08,430 --> 00:31:11,490
meta d-data tiegħek jew programmi tiegħek
jiksbu verament, tassew mdaqqsa,

709
00:31:11,490 --> 00:31:14,120
kif ikun il-każ aktar hekk
ma 'web Jittieħed bbażati tagħna.

710
00:31:14,120 --> 00:31:15,450
>> Iżda għal issa ejja nimxu 'l quddiem.

711
00:31:15,450 --> 00:31:20,120
Filwaqt jirriżulta hemm
funzjoni C imsejħa f tikseb CSV.

712
00:31:20,120 --> 00:31:24,570
File tikseb CSV, li tieħu
fajl manku bħala argument tagħha,

713
00:31:24,570 --> 00:31:28,810
u jipproċedi mbagħad, ringiela, billi
ringiela, billi ringiela, li jaqra fil-filliera.

714
00:31:28,810 --> 00:31:30,964
Allura hija biss jgħid linja
tat-test mill-fajl.

715
00:31:30,964 --> 00:31:34,130
Imma x'hemm sbieħ dwar din il-funzjoni,
ma sempliċement naħa me linja ta 'test.

716
00:31:34,130 --> 00:31:37,320
Huwa jistenna għal dawk virgoli,
u parses-linja.

717
00:31:37,320 --> 00:31:41,740
U biex parse-linja mezzi li jaqsam
fuq ċerti valuri f'dan il-kuntest.

718
00:31:41,740 --> 00:31:45,510
>> Fi kliem ieħor, sinjal dollaru
ringiela hija varjabbli li l-

719
00:31:45,510 --> 00:31:47,010
ser jagħti me mazz ta 'indiċi.

720
00:31:47,010 --> 00:31:49,635
Dan se jkun l-
ewwel kolonna CSV tiegħi.

721
00:31:49,635 --> 00:31:52,510
Dan se jkun it-tieni
kolonna, dan se tkun it-tielet,

722
00:31:52,510 --> 00:31:53,968
u dan se tkun ir-raba.

723
00:31:53,968 --> 00:31:57,440
Minħabba irtirar, u Excel l mhux
jikkooperaw l-aħħar darba għamilna dan,

724
00:31:57,440 --> 00:32:03,350
imma jekk jien tniżżel persunal dot CSV.

725
00:32:03,350 --> 00:32:04,940
Whoops, mhux semmi mill-ġdid.

726
00:32:04,940 --> 00:32:09,120
Jekk I download persunal dot
CSV, u jippruvaw jinfetaħ,

727
00:32:09,120 --> 00:32:12,510
Stajt diġà registered-- oh I
ma taġġorna Excel mill-aħħar darba.

728
00:32:12,510 --> 00:32:15,880
Int ser ikollok tara li fil-persunal dot
CSV, I jkollhom erba 'kolonni.

729
00:32:15,880 --> 00:32:18,720
Allura meta I taqra fil-
ewwel ringiela għall Abby hawn,

730
00:32:18,720 --> 00:32:23,582
dollaru sinjal ringiela 0 hija Abby,
dollaru sinjal ringiela waħda hija Lyon,

731
00:32:23,582 --> 00:32:27,740
dollaru ringiela sinjal tnejn huwa numru tagħha,
u mbagħad phone trasportatur binha.

732
00:32:27,740 --> 00:32:28,410
>> Allura li kollox.

733
00:32:28,410 --> 00:32:30,740
U li sbieħ, minħabba I
m'għandhomx għalfejn issa insemmu

734
00:32:30,740 --> 00:32:32,800
fejn kollha ta 'dawk virgoli fil-fatt huma.

735
00:32:32,800 --> 00:32:35,300
Hekk jien ser jimxi 'l quddiem u
tagħmel dan, peress li d-definizzjoni,

736
00:32:35,300 --> 00:32:38,960
Jien se ngħid li l-isem tagħha huwa
fil-bracket tal filliera żero, kif imwiegħed.

737
00:32:38,960 --> 00:32:41,150
U jien ser grab-- u
fil-fatt, inti taf liema?

738
00:32:41,150 --> 00:32:42,780
Jien ma jmur biex joqogħdu jinkwetaw dwar
isem tagħha, f'dan il-każ.

739
00:32:42,780 --> 00:32:43,988
Jien ser jżommha sempliċi.

740
00:32:43,988 --> 00:32:48,610
Jien ser tagħmel numru tagħha huwa
ringiela bracket tnejn, I think.

741
00:32:48,610 --> 00:32:50,510
U trasportatur tagħha kien fil fejn?

742
00:32:50,510 --> 00:32:53,405
Ringiela tlieta, wieħed fuq.

743
00:32:53,405 --> 00:32:54,280
Allura xejn ġdid hemmhekk.

744
00:32:54,280 --> 00:32:56,770
Huwa biss żero indiċjar fis-firxa.

745
00:32:56,770 --> 00:32:58,760
>> U issa, jien ser tagħmel dan li ġej.

746
00:32:58,760 --> 00:33:03,930
Jekk it-trasportatur huwa daqs ugwali AT & T--
Jien biss se jkollhom loop--

747
00:33:03,930 --> 00:33:06,790
Irrid li toħloq email
indirizz li tidher bħal dan.

748
00:33:06,790 --> 00:33:12,320
Li għaddej biex tkun 617-555-1212
fil, x'inhu, text.ATT.net,

749
00:33:12,320 --> 00:33:13,490
huwa dak li nixtieq do.

750
00:33:13,490 --> 00:33:15,260
Allura kif nista 'nagħmlu dan?

751
00:33:15,260 --> 00:33:16,730
Jien ser tagħmel dan li ġej.

752
00:33:16,730 --> 00:33:22,460
Indirizz tagħha se tkun numru tagħha,
u issa, let me imorru quddiem u tagħmel dan.

753
00:33:22,460 --> 00:33:23,760
Dan huwa xi sintassi funky.

754
00:33:23,760 --> 00:33:27,250
I tista 'tagħmel l-trick mija s-
imma I jistgħu attwalment biss tagħmel dan.

755
00:33:27,250 --> 00:33:29,900
>> Allura din hija ħaġa PHP, iżda
ejja jikkunsidraw dak li qed nagħmel.

756
00:33:29,900 --> 00:33:31,630
Dollaru sinjal indirizz fuq
ix-xellug, biss varjabbli.

757
00:33:31,630 --> 00:33:32,300
Agħti me varjabbli.

758
00:33:32,300 --> 00:33:33,390
I ma jkollhomx biex tispeċifika t-tip.

759
00:33:33,390 --> 00:33:34,570
PHP se figura hija out.

760
00:33:34,570 --> 00:33:36,580
Min-naħa tal-lemin,
x'inhu l-tip ta 'dejta

761
00:33:36,580 --> 00:33:38,399
ta 'dik ħaġa sħiħa fuq
il-lemin?

762
00:33:38,399 --> 00:33:40,190
Qisu string,
għaliex hemm double

763
00:33:40,190 --> 00:33:42,280
kwotazzjonijiet fuq ix-xellug nett u lemin.

764
00:33:42,280 --> 00:33:44,210
Issa hemm xi sintassi ġdid funky hawn.

765
00:33:44,210 --> 00:33:47,550
Hemm il-braces kaboċċi,
u n-numru sinjal dollaru.

766
00:33:47,550 --> 00:33:52,860
Iżda tieħu raden dak hu li sintassi
probabbilment javżak PHP tagħmel għalija?

767
00:33:52,860 --> 00:33:53,360
Yeah.

768
00:33:53,360 --> 00:33:54,630
Just daħħal il-valur hemmhekk.

769
00:33:54,630 --> 00:33:55,530
Allura l-ebda mija s.

770
00:33:55,530 --> 00:33:58,160
Aħna jistgħu jużaw print f, jew i
print f jew xi ħaġa bħal din,

771
00:33:58,160 --> 00:34:00,070
iżda PHP u ħafna ta '
lingwi ta 'livell ogħla,

772
00:34:00,070 --> 00:34:03,070
int ser tara li inti tista
jagħmlu l-istess ħaġa funzjonalment, forsi

773
00:34:03,070 --> 00:34:04,019
sitt modi differenti.

774
00:34:04,019 --> 00:34:06,310
U għalhekk jibda jsir
kwistjoni ta 'disinn jew stil.

775
00:34:06,310 --> 00:34:09,902
Allura dan huwa biss mod cryptic tfittex
ta 'tgħid, agħti lili email address,

776
00:34:09,902 --> 00:34:12,110
iżda plug-in-numru fil
bejn dawn braces kaboċċi.

777
00:34:12,110 --> 00:34:15,440
U l-braces kaboċċi mhux se
jispiċċaw fil-indirizz finali.

778
00:34:15,440 --> 00:34:18,010
>> Issa nistgħu skip fuq xi wħud mill
dawn il-linji għall-benefiċċju ħin ta.

779
00:34:18,010 --> 00:34:21,210
Mela jekk trasportatur ugwali
ugwali Whoops verHorizon--,

780
00:34:21,210 --> 00:34:24,989
Verizon-- I trid tagħmel xi ħaġa
simili ħafna, fejn l-indirizz gets,

781
00:34:24,989 --> 00:34:27,569
kwotazzjoni, unquote, numru fil text.ATT.net.

782
00:34:27,569 --> 00:34:30,380

783
00:34:30,380 --> 00:34:35,050
U mbagħad I tista 'tagħmel l-istess tip ta'
ħaġa għall-bqija tat-trasportaturi.

784
00:34:35,050 --> 00:34:37,090
Imma jien ser biss tagħmel dot, dot, dot għal issa.

785
00:34:37,090 --> 00:34:43,050
U issa ejja nassumu li
I trid iżżid firxa, imbotta.

786
00:34:43,050 --> 00:34:45,969
Irrid li żżid mal-
firxa, imsejħa indirizzi.

787
00:34:45,969 --> 00:34:50,409
>> Dan l-indirizz, dan huwa kif inti
żżid xi ħaġa għal firxa fil-PHP.

788
00:34:50,409 --> 00:34:51,610
Inti ma għandekx bżonn li tagħmel malloc.

789
00:34:51,610 --> 00:34:53,068
Inti ma għandekx resize l-array.

790
00:34:53,068 --> 00:34:54,259
Inti biss jgħidu array, push.

791
00:34:54,259 --> 00:34:57,300
What do inti tixtieq li push-- dak array
tridu li timbotta xi ħaġa fuq?

792
00:34:57,300 --> 00:34:58,000
Indirizzi.

793
00:34:58,000 --> 00:34:59,550
Dak li trid timbotta fuq indirizzi?

794
00:34:59,550 --> 00:35:00,350
Indirizz.

795
00:35:00,350 --> 00:35:02,430
U fil-fatt, jekk inti
verament tixtieq li tkun għaqlija,

796
00:35:02,430 --> 00:35:05,610
xi zokkor sintattika
għal dan, biex ngħidu hekk,

797
00:35:05,610 --> 00:35:10,230
li ifisser biss kif tista 'tagħmel dan fil
il-mod prettier, ikun li jagħmlu dan.

798
00:35:10,230 --> 00:35:14,060
Li wisq għandha l-effett ta 'tkabbir
l-array indirizzi minn daqs wieħed,

799
00:35:14,060 --> 00:35:17,130
u mbagħad plop li addizzjonali
indirizz email fih.

800
00:35:17,130 --> 00:35:17,630
Yeah.

801
00:35:17,630 --> 00:35:19,730
>> UDJENZA: [inaudible]

802
00:35:19,730 --> 00:35:22,520
>> SPEAKER 1: A typo fuq il
inkella if-- oh, trasportatur.

803
00:35:22,520 --> 00:35:23,070
Li OK.

804
00:35:23,070 --> 00:35:26,971
Hija wkoll mhux ser simili nuqqas tiegħi biex
jimplimentaw parti minn dan il-programm

805
00:35:26,971 --> 00:35:27,470
aktar tard.

806
00:35:27,470 --> 00:35:28,810
Imma inti nirringrazzja għall-qbid.

807
00:35:28,810 --> 00:35:30,671
Wieħed bug aktar.

808
00:35:30,671 --> 00:35:31,170
Grazzi.

809
00:35:31,170 --> 00:35:33,746
Irridu li dan ikun Vtext.com.

810
00:35:33,746 --> 00:35:34,340
Iva.

811
00:35:34,340 --> 00:35:34,839
Kull dritt.

812
00:35:34,839 --> 00:35:36,330
Għalhekk, fejn ma dan il-leave us?

813
00:35:36,330 --> 00:35:38,224
Imxejna bil-miktub il-kodiċi li tiftaħ il-fajl.

814
00:35:38,224 --> 00:35:40,390
Għandna linja li jtenni
matul is-ringieli fil-fajl.

815
00:35:40,390 --> 00:35:43,650
Għandna kodiċi li jżid l tiegħi
firxa, wieħed fi żmien, il-korrett

816
00:35:43,650 --> 00:35:44,790
indirizz email formattjati.

817
00:35:44,790 --> 00:35:48,480
Allura dak kollu li verament jibqa 'huwa li tibgħat
email lil kull wieħed minn dawn in-nies.

818
00:35:48,480 --> 00:35:52,830
>> Hekk stajt marret quddiem u
readied myself kif ġej.

819
00:35:52,830 --> 00:35:59,580
Dak li jien ser tagħmel hawn is-- u ejja
imorru quddiem u skip sa ċertu kodiċi attwali,

820
00:35:59,580 --> 00:36:00,620
li tidher bħal dan.

821
00:36:00,620 --> 00:36:02,950
Allura hawnhekk huwa l-pre-moħmija
Verżjoni I kiteb aktar kmieni.

822
00:36:02,950 --> 00:36:04,700
U avviż I lest
implimentazzjoni Sprint.

823
00:36:04,700 --> 00:36:06,130
I lest implimentazzjoni T-Mobile.

824
00:36:06,130 --> 00:36:08,020
I lest implimentazzjoni Virgin Mobile.

825
00:36:08,020 --> 00:36:09,622
U jien ser ruhna bil-quddiem.

826
00:36:09,622 --> 00:36:12,080
Hemm xi trasportaturi ftit li
xi studenti fil-klassi jkollha

827
00:36:12,080 --> 00:36:14,640
li jien ma jolqot enumerazzjoni
fil-jekk il-kundizzjoni hawn.

828
00:36:14,640 --> 00:36:16,015
Allura mhux l-testi se jmorru barra.

829
00:36:16,015 --> 00:36:17,556
Imma ejja ara x'iktar I bżonn tagħmel.

830
00:36:17,556 --> 00:36:19,660
I qrib il-fajl, just
bħal fil-p stabbiliti erbgħa.

831
00:36:19,660 --> 00:36:20,835
>> U dan huwa sintassi ġdida.

832
00:36:20,835 --> 00:36:22,710
U aħna ser tara ftit
ftit ta 'dan maż-żmien,

833
00:36:22,710 --> 00:36:24,450
speċjalment bil-p stabbiliti seba u tmienja.

834
00:36:24,450 --> 00:36:28,140
Iżda din hija sintassi għall-ħolqien
tip speċjali ta 'struttura.

835
00:36:28,140 --> 00:36:31,490
Jirriżulta hemm librerija li
jiġi ma PHP, imsejħa mailer PHP.

836
00:36:31,490 --> 00:36:33,840
L-għan tiegħu fil-ħajja huwa li
programmatically jibgħat emails.

837
00:36:33,840 --> 00:36:36,840
Huwa xi ħadd ieħor kiteb li kodiċi
jagħmilha aktar faċli għalina li jibgħat emails,

838
00:36:36,840 --> 00:36:39,131
hekk aħna ma jkollhomx biex iżommu
tmur quddiem u lura għall-Gmail,

839
00:36:39,131 --> 00:36:41,151
u pasta fil indirizzi email tan-nies.

840
00:36:41,151 --> 00:36:44,150
Hemm mazz sħiħ ta 'linji hawn
li onestament, I biss tip ta 'kkupjati

841
00:36:44,150 --> 00:36:45,660
u pasted mid-dokumentazzjoni.

842
00:36:45,660 --> 00:36:47,409
U fil-fatt, jekk int
kurjuż, I xellug kollha

843
00:36:47,409 --> 00:36:50,550
mill-URLs tad-dokumentazzjoni
fil-kodiċi li aħna ser post aktar tard.

844
00:36:50,550 --> 00:36:52,360
U tinnota li fost
l-affarijiet li qed nagħmel

845
00:36:52,360 --> 00:36:55,710
huwa, jien javżak din il-librerija,
jużaw server Gmail, il right?

846
00:36:55,710 --> 00:36:59,360
SMTP tkellimna fil-qosor dwar meta aħna
kienu fil-Yale dwar jiġu mail sempliċi

847
00:36:59,360 --> 00:37:00,110
protokoll ta 'trasferiment.

848
00:37:00,110 --> 00:37:02,920
Hu l-protokoll li
servers użati sabiex tintbagħat email,

849
00:37:02,920 --> 00:37:05,150
u that's-- Gmail għandha waħda minn dawn.

850
00:37:05,150 --> 00:37:07,290
A port, dan huwa n-numru port TCP.

851
00:37:07,290 --> 00:37:09,630
Huwa tal-multa jekk inti
ma bbenefikawx 587 qabel.

852
00:37:09,630 --> 00:37:11,420
Biss jafu li mid-dokumentazzjoni.

853
00:37:11,420 --> 00:37:12,250
Hawn username tiegħi.

854
00:37:12,250 --> 00:37:13,670
Jien ser tuża l-bot CF50.

855
00:37:13,670 --> 00:37:16,690
U fil-mument, jien biss ser
tip fil-password attwali tal-bot s.

856
00:37:16,690 --> 00:37:18,690
U mbagħad stabbiliti hawn, avviż dak li jibqa.

857
00:37:18,690 --> 00:37:22,840
>> I sett tiegħi minn indirizz
li jiġu bot fil CS50.net.

858
00:37:22,840 --> 00:37:26,240
I think I mhux se jiddispjaċihom jibgħat
messaġġ lil 800 persuna li

859
00:37:26,240 --> 00:37:30,590
jgħid, miss inti, bot CS50 imħabba, forsi
għal dawk li ma setgħetx tagħmel dan illum.

860
00:37:30,590 --> 00:37:33,160
U mbagħad bi qbil 76, x'għandi nagħmel?

861
00:37:33,160 --> 00:37:39,010
Dan it-tip ta 'qisu C. Allura għal i
ikun egwali għal 0, n equals-- issa joqgħod huwa ġdid.

862
00:37:39,010 --> 00:37:42,077
Jirriżulta li jekk inti tixtieq li tikseb
in-numru ta 'affarijiet fil-firxa,

863
00:37:42,077 --> 00:37:43,660
inti ma għandekx tiftakar aktar.

864
00:37:43,660 --> 00:37:45,370
Tista 'staqsi
funzjoni msejħa għadd,

865
00:37:45,370 --> 00:37:48,320
u se jgħidlek kemm għandek
indirizzi huma f'dik firxa.

866
00:37:48,320 --> 00:37:53,210
>> U allura jien ser iżżid
l-indirizz li l-email.

867
00:37:53,210 --> 00:37:55,090
U naf dan mill
juża d-dokumentazzjoni.

868
00:37:55,090 --> 00:37:56,900
Hemm xi funzjoni indirizz add.

869
00:37:56,900 --> 00:37:58,980
U issa avviż hemm
hija biċċa waħda ta 'sintassi.

870
00:37:58,980 --> 00:38:01,470
Rajna dan qabel
fil C. Simili fl-ispirtu.

871
00:38:01,470 --> 00:38:04,100
Inti tista 'taħseb sinjal dollaru
mail bħala varjabbli, li huwa.

872
00:38:04,100 --> 00:38:08,100
Imma hija Istituzzjonjijiet ġewwa ta
li mhumiex biss il-proprjetajiet,

873
00:38:08,100 --> 00:38:09,400
varjabbli jekk inti se.

874
00:38:09,400 --> 00:38:13,480
Iżda jirriżulta li fil-PHP, li
huwa programmazzjoni oġġett orjentati lejn

875
00:38:13,480 --> 00:38:16,520
lingwa, bħal Java jekk ħadt APCs.

876
00:38:16,520 --> 00:38:21,420
>> Dollar mail sinjal, jekk inti tixtieq to--
għandu wkoll funzjonijiet ġewwa ta 'dan,

877
00:38:21,420 --> 00:38:22,380
jew metodi.

878
00:38:22,380 --> 00:38:24,720
Allura dan huwa li wieħed jgħid li
mailer PHP speċjali

879
00:38:24,720 --> 00:38:29,280
librerija, jekk stajt ltqajna varjabbli tiegħu,
jekk irrid li jsejjaħ il-funzjoni li

880
00:38:29,280 --> 00:38:31,559
jiġi ma dak librerija,
għal skopijiet tal-lum,

881
00:38:31,559 --> 00:38:33,100
biss taf inti tuża l-notazzjoni vleġġa.

882
00:38:33,100 --> 00:38:34,150
M'hemm l-ebda dot notazzjoni.

883
00:38:34,150 --> 00:38:35,220
Huwa biss il-vleġġa.

884
00:38:35,220 --> 00:38:36,380
Imma dak li mhux pointer.

885
00:38:36,380 --> 00:38:38,680
Huwa biss mislufa minn sintassi Ċ.

886
00:38:38,680 --> 00:38:43,620
Hekk jitolbu żid indirizz ġewwa tal
oġġett din il-librerija jew varjabbli.

887
00:38:43,620 --> 00:38:44,440
>> Kull dritt.

888
00:38:44,440 --> 00:38:45,570
Dan huwa l-linja maġika.

889
00:38:45,570 --> 00:38:46,740
Thats kif I ibgħat email.

890
00:38:46,740 --> 00:38:50,040
Dan huwa l-ekwivalenti ta 'ftuħ
Gmail, ittajpjar dan jitwettaq, u laqtu tibgħat.

891
00:38:50,040 --> 00:38:54,870
Iżda li għaddej biex minflok tibgħat
email f'dan l-indirizz, ma dan il-korp,

892
00:38:54,870 --> 00:38:57,120
mill-bot CS50.

893
00:38:57,120 --> 00:38:58,710
U issa linja ewlenija.

894
00:38:58,710 --> 00:39:03,130
Din il-linja kien nieqes bl-istess 2011
meta I think I aħħar ppruvaw dan.

895
00:39:03,130 --> 00:39:05,640
Dik il-linja hemm, naturalment,
ikklerja l-indirizzi.

896
00:39:05,640 --> 00:39:07,920
Għalhekk loġikament, jekk I
ma ċar l-indirizz

897
00:39:07,920 --> 00:39:11,740
wara kull iterazzjoni, l-ewwel
email jew messaġġ test tmur għall Alice,

898
00:39:11,740 --> 00:39:14,320
it-tieni tmur għall
Alice u Bob, it-tielet

899
00:39:14,320 --> 00:39:17,870
tmur għall Alice u Bob u Charlie,
għalhekk l-iżball għaljin ħafna

900
00:39:17,870 --> 00:39:18,760
I magħmula dik is-sena.

901
00:39:18,760 --> 00:39:21,080
>> Mela ejja ara.

902
00:39:21,080 --> 00:39:24,200
Hemm xi mistoqsijiet
qabel aħna nibagħtulek kollha f'test

903
00:39:24,200 --> 00:39:28,210
Messaġġ bi probabbiltà 10 fil-mija?

904
00:39:28,210 --> 00:39:28,940
Kwalunkwe mistoqsijiet?

905
00:39:28,940 --> 00:39:30,330
Kull dritt.

906
00:39:30,330 --> 00:39:36,100
Ejja me go fil hawn u l-bidla
l-password biex dak li għandu xogħol,

907
00:39:36,100 --> 00:39:37,780
x'aktarx se tikseb lista sewda mill Gmail.

908
00:39:37,780 --> 00:39:39,821
Allura dawn jistgħu ma kollha jmorru
out, billi probabbilment

909
00:39:39,821 --> 00:39:42,960
ma bħalna bagħat 800 emails
fil-għal loop kollha f'daqqa.

910
00:39:42,960 --> 00:39:45,140
Peress li mhux
mġieba partikolarment bniedem.

911
00:39:45,140 --> 00:39:47,460
>> Oh, jien se jibdlu ħaġa waħda oħra.

912
00:39:47,460 --> 00:39:50,850
Fil-quċċata, jien ser sent--
jibdlu l-fajl lill-istudenti dot CSV.

913
00:39:50,850 --> 00:39:55,420
U jien mhux se tiftaħ dan, iżda din hija
fajl CSV identiku ma 100 persunal,

914
00:39:55,420 --> 00:39:58,970
iżda 800 studenti, biss
minn Harvard, Yale minħabba

915
00:39:58,970 --> 00:40:00,207
għandha recess Ottubru din il-ġimgħa.

916
00:40:00,207 --> 00:40:03,290
U jidher li huwa simili tip ta 'ħaġa jerk
tagħmel għat-test kull wieħed minnhom għaliex

917
00:40:03,290 --> 00:40:04,750
dawn mhux qed fil-klassi fuq btala.

918
00:40:04,750 --> 00:40:05,250
Li OK.

919
00:40:05,250 --> 00:40:08,310
Just istudenti Harvard
illum ġewwa ta 'dan il-fajl.

920
00:40:08,310 --> 00:40:12,320
U issa ejja mmorru lura
tieqa terminal tiegħi.

921
00:40:12,320 --> 00:40:13,710
Jien tip ta 'nervuża.

922
00:40:13,710 --> 00:40:22,000
>> OK hekk issa jien se jmorru fil-
tad-direttorju, u t-test PHP dot PHP.

923
00:40:22,000 --> 00:40:24,950
Kif dwar voluntier brave wieħed?

924
00:40:24,950 --> 00:40:26,690
So I ma jridux dan fuqi.

925
00:40:26,690 --> 00:40:28,410
OK, jaqgħu fuq up.

926
00:40:28,410 --> 00:40:29,162
X'hemm isem tiegħek?

927
00:40:29,162 --> 00:40:29,662
MAYA: Maya.

928
00:40:29,662 --> 00:40:30,328
SPEAKER 1: Maya.

929
00:40:30,328 --> 00:40:31,610
Come on up, Maya.

930
00:40:31,610 --> 00:40:34,120
Kull dritt.

931
00:40:34,120 --> 00:40:35,389
Ejja naraw jekk dan jaħdem.

932
00:40:35,389 --> 00:40:38,430
Nressaq indirizz email tiegħi stess fil-
file-- numru tat-telefon tiegħi stess fil-fajl,

933
00:40:38,430 --> 00:40:40,110
b'tali mod li nisperaw I ser tingħata waħda kif ukoll.

934
00:40:40,110 --> 00:40:40,819
Għandi pjaċir.

935
00:40:40,819 --> 00:40:41,443
MAYA: Bl-istess mod.

936
00:40:41,443 --> 00:40:44,510
SPEAKER 1: Allura kull ma għandek tagħmel huwa
hit Ikteb biex jibagħtu 800 messaġġi,

937
00:40:44,510 --> 00:40:45,466
jekk I ma screw up.

938
00:40:45,466 --> 00:40:51,106

939
00:40:51,106 --> 00:40:51,606
Nizza.

940
00:40:51,606 --> 00:40:55,556

941
00:40:55,556 --> 00:40:58,430
Jista 'jieħu waqt, statistikament,
sakemm aħna jiksbu l email address--

942
00:40:58,430 --> 00:41:00,573
messaġġ li l-
fil-kamra dritt issa.

943
00:41:00,573 --> 00:41:03,880

944
00:41:03,880 --> 00:41:05,390
Ejja linger u ara.

945
00:41:05,390 --> 00:41:06,940
>> UDJENZA: [whistling]

946
00:41:06,940 --> 00:41:08,270
>> SPEAKER 1: Oh, iva.

947
00:41:08,270 --> 00:41:09,230
>> UDJENZA: Oh, gotcha.

948
00:41:09,230 --> 00:41:16,720

949
00:41:16,720 --> 00:41:19,180
>> SPEAKER 1: Għal loops are-- dan
mhux bil-mod minħabba PHP.

950
00:41:19,180 --> 00:41:21,810
Dan huwa bil-mod minħabba Gmail
huwa throttling magħna u mhux

951
00:41:21,810 --> 00:41:25,170
kiri us jibgħat aktar minn
bħal email wieħed kull sekonda.

952
00:41:25,170 --> 00:41:26,300
Xejn?

953
00:41:26,300 --> 00:41:29,990
Din kienet ħaġa diffiċli għalija li jsir test
dar ma biss lili u wieħed telefon tiegħi, so.

954
00:41:29,990 --> 00:41:37,630

955
00:41:37,630 --> 00:41:41,111
Hija li nisperaw mill-bot?

956
00:41:41,111 --> 00:41:41,610
Iva?

957
00:41:41,610 --> 00:41:42,110
Nru?

958
00:41:42,110 --> 00:41:44,760

959
00:41:44,760 --> 00:41:46,620
Say iva.

960
00:41:46,620 --> 00:41:47,479
Nru?

961
00:41:47,479 --> 00:41:49,374
Huwa minn ħabib?

962
00:41:49,374 --> 00:41:49,874
Skomdi.

963
00:41:49,874 --> 00:41:50,374
KOLLOX SEW.

964
00:41:50,374 --> 00:41:56,580

965
00:41:56,580 --> 00:42:00,090
Pretty żgur huwa xogħol għalkemm.

966
00:42:00,090 --> 00:42:00,910
Uh oh.

967
00:42:00,910 --> 00:42:03,190
Huma black-- oh, stenna minuta.

968
00:42:03,190 --> 00:42:04,280
Oh, inti taf liema?

969
00:42:04,280 --> 00:42:06,100
Wieħed mument jekk jogħġbok.

970
00:42:06,100 --> 00:42:07,802
Biss Maya u I-- Mia, kien dan?

971
00:42:07,802 --> 00:42:08,301
MAYA: Maya.

972
00:42:08,301 --> 00:42:12,110
SPEAKER 1: Maya, ser
jafu dak li għamilt ħażin hawnhekk.

973
00:42:12,110 --> 00:42:14,890
Oh, stenna minuta.

974
00:42:14,890 --> 00:42:23,320
I think I biss mibgħuta 100
messaġġi lil 555-1212.

975
00:42:23,320 --> 00:42:24,346
Stand by.

976
00:42:24,346 --> 00:42:28,080

977
00:42:28,080 --> 00:42:29,270
I ma tistax tirbaħ xi sena.

978
00:42:29,270 --> 00:42:30,180
KOLLOX SEW.

979
00:42:30,180 --> 00:42:30,680
Maya?

980
00:42:30,680 --> 00:42:33,530

981
00:42:33,530 --> 00:42:36,219
Jiffissaw dak fil-produzzjoni post.

982
00:42:36,219 --> 00:42:36,718
Dammit!

983
00:42:36,718 --> 00:42:39,430

984
00:42:39,430 --> 00:42:40,390
Wara mill-indirizz.

985
00:42:40,390 --> 00:42:41,301
OK, stand by.

986
00:42:41,301 --> 00:42:41,800
Jiddispjacini.

987
00:42:41,800 --> 00:42:44,550

988
00:42:44,550 --> 00:42:47,080
Huwa uġigħ kull sena.

989
00:42:47,080 --> 00:42:48,640
OK, wieħed mument.

990
00:42:48,640 --> 00:42:50,530
Dan huwa tajjeb.

991
00:42:50,530 --> 00:42:54,010
I am minflok se tagħmel dan.

992
00:42:54,010 --> 00:42:55,470
Indirizz Stampa.

993
00:42:55,470 --> 00:42:56,030
OK, stand by.

994
00:42:56,030 --> 00:43:01,340
Indirizzi Stampa, i bracket.

995
00:43:01,340 --> 00:43:02,710
Yeah, I simili li.

996
00:43:02,710 --> 00:43:10,220
Sign-- Dollar OK I ser jispjegaw dak li jien
tagħmel fil-mument, wara stajt run dan.

997
00:43:10,220 --> 00:43:11,670
Kull sena.

998
00:43:11,670 --> 00:43:13,125
OK, here we go.

999
00:43:13,125 --> 00:43:15,750
I jkollhom just-- u ma rridx
li juru numru ta 'kulħadd telefon,

1000
00:43:15,750 --> 00:43:17,740
iżda Maya tista 'tikkonferma
ma nod tar-ras,

1001
00:43:17,740 --> 00:43:20,800
li hi tara kulħadd
numru tat-telefon fil-klassi

1002
00:43:20,800 --> 00:43:26,750
li jien ser kopja fis
programm imsejjaħ Gmail.

1003
00:43:26,750 --> 00:43:30,860
U jekk fil Gmail, dak li rridu ngħidu?

1004
00:43:30,860 --> 00:43:32,137
Miss inti.

1005
00:43:32,137 --> 00:43:33,220
Love-- li mhux mill me.

1006
00:43:33,220 --> 00:43:35,230
I lanqas biss hit jibgħat s'issa.

1007
00:43:35,230 --> 00:43:39,450
Mela ejja imorru quddiem u jagħmlu
dan, jekk nista 'zoom.

1008
00:43:39,450 --> 00:43:40,300
KOLLOX SEW.

1009
00:43:40,300 --> 00:43:42,480
Hekk jien permezz ta 'programm imsejjaħ Gmail issa.

1010
00:43:42,480 --> 00:43:44,490
Jekk Maya, inti tixtieq li
ikklikkja l-buttuna Ibgħat,

1011
00:43:44,490 --> 00:43:46,970
aħna se jissimulaw dak li
kodiċi għandu jkollu jsir.

1012
00:43:46,970 --> 00:43:54,630

1013
00:43:54,630 --> 00:43:55,254
>> Xejn?

1014
00:43:55,254 --> 00:43:56,062
>> [Beeps]

1015
00:43:56,062 --> 00:43:56,870
>> UDJENZA: Yep.

1016
00:43:56,870 --> 00:43:58,030
>> SPEAKER 1: Iva?

1017
00:43:58,030 --> 00:43:59,210
Salvazzjoni?

1018
00:43:59,210 --> 00:44:00,427
>> UDJENZA: Yep.

1019
00:44:00,427 --> 00:44:01,260
SPEAKER 1: Miss inti.

1020
00:44:01,260 --> 00:44:02,718
U jien ser jibgħat il-bqija.

1021
00:44:02,718 --> 00:44:06,060
I bagħtet nofs minħabba I ma naħsibx
Gmail let dawk jgħaddu.

1022
00:44:06,060 --> 00:44:12,410
Hekk biss ftakar, illum huwa l-jum
li inti tgħallimt li nista 'nuża Gmail.

1023
00:44:12,410 --> 00:44:14,977

1024
00:44:14,977 --> 00:44:15,810
Dan kien horrifying.

1025
00:44:15,810 --> 00:44:17,140
A applause kbir għall Maya.

1026
00:44:17,140 --> 00:44:18,980
Grazzi.

1027
00:44:18,980 --> 00:44:21,280
Dritt kollox, hekk.

1028
00:44:21,280 --> 00:44:22,210
xiex

1029
00:44:22,210 --> 00:44:23,140
>> [Beeps]

1030
00:44:23,140 --> 00:44:25,010

1031
00:44:25,010 --> 00:44:26,580
>> Aħna ltqajna beeps ftit, iva?

1032
00:44:26,580 --> 00:44:27,080
Kull dritt.

1033
00:44:27,080 --> 00:44:30,590
Issa jien ser tikseb 700 tassew
emails kuntent lura minn klassi.

1034
00:44:30,590 --> 00:44:32,400
Dan bl-inqas Ser naraw
jekk dan kien worth it.

1035
00:44:32,400 --> 00:44:33,300
Allura dak li marret ħażin?

1036
00:44:33,300 --> 00:44:35,300
I ser ċifra barra dak li marret
ħażin wara l-fatt,

1037
00:44:35,300 --> 00:44:38,340
imma biss ħarsa kemm huwa faċli
kien li tagħmel dan fil-PHP.

1038
00:44:38,340 --> 00:44:44,598
Allura x'nistgħu attwalment jagħmlu issa li
għandna dan expressiveness ta PHP.

1039
00:44:44,598 --> 00:44:45,970
Li was-- li kien horrible.

1040
00:44:45,970 --> 00:44:46,480
Kull dritt.

1041
00:44:46,480 --> 00:44:48,430
Allura li kien dak li kellu intfiet.

1042
00:44:48,430 --> 00:44:52,770
Dan kien me ittestjar dalgħodu fuq tiegħi
telefon, screenshot attwali tat-telefon tiegħi.

1043
00:44:52,770 --> 00:44:56,180
>> Imma issa ejja jikkunsidraw għaliex
aħna qed attwalment introduzzjoni

1044
00:44:56,180 --> 00:44:57,840
kollha ta 'dan il-għalf fl-ewwel post.

1045
00:44:57,840 --> 00:45:01,625
Allura l-għan mhuwiex li
jiktbu dawn il-programmi li

1046
00:45:01,625 --> 00:45:03,250
huma miktuba fil-linja tal-kmand, right?

1047
00:45:03,250 --> 00:45:05,000
So I kiteb sempliċi
Hello program, I kiteb

1048
00:45:05,000 --> 00:45:09,155
programm ftit li ma conditionals,
u użati linja read u oħrajn.

1049
00:45:09,155 --> 00:45:11,530
U fit-teorija, I biss kiteb
programm li bagħtet

1050
00:45:11,530 --> 00:45:14,290
800 messaġġi, jagħtu jew jieħu 800.

1051
00:45:14,290 --> 00:45:16,830
U dak il-programm kienet kollha
għadhom jaħdmu fil-linja tal-kmand.

1052
00:45:16,830 --> 00:45:18,538
U li naturalment huwa
mhux il-web, right?

1053
00:45:18,538 --> 00:45:22,160
L-għan issa huwa li tibda tuża
dak I pretensjoni hija eħfef għall-użu

1054
00:45:22,160 --> 00:45:24,720
lingwa, daresay aktar
lingwa qawwija f'termini

1055
00:45:24,720 --> 00:45:27,104
tal-karatteristiċi li
jiġu magħha, li tibda

1056
00:45:27,104 --> 00:45:29,850
miktub kodiċi li jiġġenera paġni web.

1057
00:45:29,850 --> 00:45:33,248
>> Allura aħħar darba u aħħar ġimgħa,
tkellimna dwar HTTP u HTML.

1058
00:45:33,248 --> 00:45:36,350
U x'hemm sbieħ dwar HTML
hija li huwa biss test pur.

1059
00:45:36,350 --> 00:45:38,220
U t-test huwa ċertament
xi ħaġa li inti tista '

1060
00:45:38,220 --> 00:45:42,040
print mill litteralment ċċempel l-istampar
f funzjoni, jew il-funzjoni tal-istampar.

1061
00:45:42,040 --> 00:45:46,160
U fil-fatt, dan huwa dak PHP huwa
issa ser inessu li jagħmlu.

1062
00:45:46,160 --> 00:45:48,610
Allura fost l-eżempji aħna
jkollhom fil-kodiċi tas-sors tal-lum,

1063
00:45:48,610 --> 00:45:51,610
minbarra għal xi wħud mill-kodiċi
li nressaq up hemm mument ilu,

1064
00:45:51,610 --> 00:45:55,440
għandna programmi bħal din, per eżempju.

1065
00:45:55,440 --> 00:45:58,760
Froshims, jew Freshman
Intramurali Sports, kien effettivament

1066
00:45:58,760 --> 00:46:01,500
wieħed mill-ewwel extracurriculars
I ltqajna involuti ma 'snin ilu.

1067
00:46:01,500 --> 00:46:03,750
U roommate tiegħi u I, bl
xi gidjien oħra fuq il-kampus,

1068
00:46:03,750 --> 00:46:05,280
użati biex imexxu l-programm froshims.

1069
00:46:05,280 --> 00:46:07,420
Jien jkollna messaġġi tiegħi issa.

1070
00:46:07,420 --> 00:46:14,030
>> Issa hekk aħna, lura fil-ġurnata, għalhekk dan
kien 1,996 jew hekk, kien hemm internet,

1071
00:46:14,030 --> 00:46:17,395
iżda ma kien hemm l-ebda process-- hemm
ma kienx websajt għall froshims.

1072
00:46:17,395 --> 00:46:20,270
U hekk jekk inti riedu biex jiffirmaw għall
futbol jew volleyball jew kwalunkwe,

1073
00:46:20,270 --> 00:46:22,240
inti jimla dan il-ħaġa
imsejħa biċċa karta,

1074
00:46:22,240 --> 00:46:25,060
u inti se jimxu madwar Harvard
tarzna, u inti mexxiha

1075
00:46:25,060 --> 00:46:29,230
fl-islott posta tal-Procter, li
kien fil Wigglesworth, wieħed mill-dorms.

1076
00:46:29,230 --> 00:46:31,270
U dan kienu inti rreġistrat.

1077
00:46:31,270 --> 00:46:33,570
U hu jew hi se tkun imbagħad
compose email lilek

1078
00:46:33,570 --> 00:46:36,514
manwalment, ferm simili I
biss ma hawn ma Maya,

1079
00:46:36,514 --> 00:46:38,930
u allura inti tkun ikkonfermata
peress li kienu rreġistrati.

1080
00:46:38,930 --> 00:46:40,840
>> Allura dan kien simili baxxa
jiddendlu frott, biex ngħidu hekk.

1081
00:46:40,840 --> 00:46:42,930
Kien tip ta 'stupid li
konna uża karta biex dan.

1082
00:46:42,930 --> 00:46:45,024
Xtaqt li nkunu kapaċi
li jmorru biss fuq websajt,

1083
00:46:45,024 --> 00:46:47,440
jew għandhom l-freshmen jmorru fuq
website, jirreġistraw għall-isports,

1084
00:46:47,440 --> 00:46:50,398
u biss awtomat ħafna dan il-għalf
billi isimhom u emails

1085
00:46:50,398 --> 00:46:51,850
u oħrajn f 'database.

1086
00:46:51,850 --> 00:46:56,510
U fil-fatt, l-ewwel verżjoni
tal-websajt, bl-użu super ikrah HTML,

1087
00:46:56,510 --> 00:46:58,195
jista ħarsu xi ħaġa bħal din.

1088
00:46:58,195 --> 00:47:01,070
Kien fil-fatt, Ironikament, aktar
imbarazzanti tħares minn din lura

1089
00:47:01,070 --> 00:47:01,460
imbagħad.

1090
00:47:01,460 --> 00:47:02,890
Imma I użati lingwa ta 'programmar.

1091
00:47:02,890 --> 00:47:06,060
Mhux PHP, iżda imsejħa Perl,
li hija lingwa anzjani,

1092
00:47:06,060 --> 00:47:07,251
iżda simili ħafna fl-ispirtu.

1093
00:47:07,251 --> 00:47:09,000
U jien biss kompletament
mgħallma lill myself.

1094
00:47:09,000 --> 00:47:12,208
U hija ħadet me a filwaqt li figura hija out,
tistaqsi lottijiet ta 'mistoqsijiet ta' ħbieb.

1095
00:47:12,208 --> 00:47:14,080
Iżda l-ideat hemmhekk
kienu eżattament l-istess.

1096
00:47:14,080 --> 00:47:18,050
Għaliex dak PHP kien verament imfassla
għaliha mhijiex l-għalf linja ta 'kmand

1097
00:47:18,050 --> 00:47:20,450
aħna biss lagħbu,
iżda għall-ipprogrammar tal-web.

1098
00:47:20,450 --> 00:47:24,960
>> Huwa tassew marbuta karatteristika tagħha
stabbiliti għall-web, kif ġej.

1099
00:47:24,960 --> 00:47:26,370
Dan huwa froshims.

1100
00:47:26,370 --> 00:47:28,720
U jekk jien ridt li
tirreġistra f'din il-forma,

1101
00:47:28,720 --> 00:47:30,930
dan huwa pjuttost ikrah,
ċertament, iżda let me jimxi 'l quddiem

1102
00:47:30,930 --> 00:47:34,440
u tkun student inqas komdi,
u tkun xi tkun l-isport għall Matthews,

1103
00:47:34,440 --> 00:47:35,630
ikklikkja Reġistru.

1104
00:47:35,630 --> 00:47:39,780
Dak li nixtieq li tkun tista 'tagħmel huwa
jissottomettu informazzjoni minn forma,

1105
00:47:39,780 --> 00:47:42,400
ma server Google bħal
għamilna aħħar darba, kompletament

1106
00:47:42,400 --> 00:47:47,100
qerq bl-użu backend tagħhom, I
tixtieq li jimplimentaw kodiċi tiegħi backend stess.

1107
00:47:47,100 --> 00:47:51,410
Li jfisser write PHP
kodiċi li jgħix fi URL

1108
00:47:51,410 --> 00:47:54,180
li d-data f'forma jistgħu jiġu sottomessi lill.

1109
00:47:54,180 --> 00:47:57,510
>> U mbagħad kodiċi tiegħek,
miktub fil-PHP fuq server,

1110
00:47:57,510 --> 00:47:59,400
jistgħu mbagħad iwieġbu għal dik jintuza mill-utent.

1111
00:47:59,400 --> 00:48:03,287
Bħall-isem tiegħu jew tagħha, jew livell ta 'kumdità,
jew dorm, u mbagħad tagħmel xi ħaġa ma 'dan.

1112
00:48:03,287 --> 00:48:05,120
F'dan il-każ, I biss
stupidly stampata out

1113
00:48:05,120 --> 00:48:06,750
bħala test, li mhux kollha li pretty.

1114
00:48:06,750 --> 00:48:09,590
Imma inti tista 'ċertament
Immaġina, jekk inti taf HTML,

1115
00:48:09,590 --> 00:48:13,010
u tkun taf dalwaqt tkun taf kif tiġġenera
HTML li jistampa f, u print,

1116
00:48:13,010 --> 00:48:16,500
u funzjonijiet simili, inti tista 'ċertament
jiġġeneraw web page prettier li tgħid,

1117
00:48:16,500 --> 00:48:17,929
ħej David, inti issa huma reġistrati.

1118
00:48:17,929 --> 00:48:20,220
Inti inqas komdi
student minn Matthews, id-dritt?

1119
00:48:20,220 --> 00:48:23,880
>> Tista 'biss tuża mazz sħiħ ta'% ses,
jew l-braces kaboċċi u sinjal dollaru

1120
00:48:23,880 --> 00:48:27,750
notazzjoni I użati mument ilu, li
jiġġeneraw test li l-aktar faċli

1121
00:48:27,750 --> 00:48:28,567
minn dan.

1122
00:48:28,567 --> 00:48:30,150
Mela ejja tagħti ħarsa lejn dan il-fajl wieħed.

1123
00:48:30,150 --> 00:48:34,666
Froshim żero dot PHP tidher bħal dan.

1124
00:48:34,666 --> 00:48:37,860

1125
00:48:37,860 --> 00:48:43,500
Meta I rikarigu IDE CS50,
żero froshim tidher bħal dan.

1126
00:48:43,500 --> 00:48:45,700
Dan huwa froshim żero dot PHP.

1127
00:48:45,700 --> 00:48:47,730
U dak li tinnota dwar dan il-fajl?

1128
00:48:47,730 --> 00:48:49,506
>> UDJENZA: [inaudible]

1129
00:48:49,506 --> 00:48:50,922
SPEAKER 1: Jiddispjacini, ftit louder?

1130
00:48:50,922 --> 00:48:53,250
UDJENZA: [inaudible] Dan kollu fil HTML.

1131
00:48:53,250 --> 00:48:57,130
U fil-fatt, huwa, minħabba
x'hemm interessanti dwar PHP

1132
00:48:57,130 --> 00:48:58,880
huwa li dan ikun disinjat
li jkun, għall aħjar

1133
00:48:58,880 --> 00:49:02,110
jew għall-agħar, intermingled
ma HTML code.

1134
00:49:02,110 --> 00:49:05,850
U fil-fatt, anke jekk din
fajl, froshim żero dot PHP,

1135
00:49:05,850 --> 00:49:11,470
għandha kumment PHP fil-quċċata
ta 'dan, huwa kollha biss HTML.

1136
00:49:11,470 --> 00:49:17,655
Iżda għall-kuntrarju, jekk I jiftħu, ejja
jiġifieri, reġistru żero dot PHP, li

1137
00:49:17,655 --> 00:49:19,550
biss għandha kumment big fil-quċċata.

1138
00:49:19,550 --> 00:49:26,500
Dan ukoll jistenna kważi għal kollox
bħal HTML, ħlief għal liema?

1139
00:49:26,500 --> 00:49:29,350
Line, liema, 21 jistenna ftit stramb.

1140
00:49:29,350 --> 00:49:32,739
>> Imma avviż jien jidħlu modalità PHP
ma bracket miftuħa kwistjoni mark PHP.

1141
00:49:32,739 --> 00:49:33,780
Imbagħad stajt ltqajna xi għalf.

1142
00:49:33,780 --> 00:49:36,724
U mbagħad fl-aħħar ta din il-linja
kważi jien, kwistjoni marka PHP.

1143
00:49:36,724 --> 00:49:38,390
U dan huwa dak I jfisser minn intermingled.

1144
00:49:38,390 --> 00:49:41,910
Tista 'tikteb HTML li inti biss
jridu li l-server li bżiq out.

1145
00:49:41,910 --> 00:49:45,090
Imma jekk inti tixtieq li tagħmel xi ħaġa
partway dinamika permezz tal-paġna,

1146
00:49:45,090 --> 00:49:47,699
bħal isem tiegħi jew
dorm jew livell ta 'kumdità,

1147
00:49:47,699 --> 00:49:49,490
I jistgħu jużaw funzjoni
bħal print r, li hija

1148
00:49:49,490 --> 00:49:52,492
jistampaw rikursivi, li ifisser biss
jistampa dan il-varjabbli, ifformattjar

1149
00:49:52,492 --> 00:49:53,200
madankollu trid.

1150
00:49:53,200 --> 00:49:55,880
Huwa verament mhux għall
skopijiet umani, huwa biss

1151
00:49:55,880 --> 00:49:58,290
għal debugging jew skopijiet dijanjostiċi.

1152
00:49:58,290 --> 00:49:59,460
Allura li kif għamilt dan.

1153
00:49:59,460 --> 00:50:06,100
>> Jekk I minflok tmur froshims tnejn dot PHP,
avviż li l-azzjoni ta 'din il-formola

1154
00:50:06,100 --> 00:50:09,680
mhux reġistrat żero dot PHP bħala l-
old-- dak preċedenti attwalment kien.

1155
00:50:09,680 --> 00:50:11,222
Iżda huwa rreġistrat tnejn dot PHP.

1156
00:50:11,222 --> 00:50:13,680
Mela ejja nħarsu lejn kif dan wieħed
ġġib ruħha ftit differenti.

1157
00:50:13,680 --> 00:50:15,140
Jekk immur fis Verżjoni tnejn.

1158
00:50:15,140 --> 00:50:20,430
Jekk hawn, jekk I tirreġistra bħala David, anqas
komdu, minn dorm ta Mathews,

1159
00:50:20,430 --> 00:50:21,480
jirreġistraw.

1160
00:50:21,480 --> 00:50:23,770
Allura din id-darba qal, inti
huma rreġistrati, mhux verament.

1161
00:50:23,770 --> 00:50:25,370
Ejja naraw dak li għamilt hawn.

1162
00:50:25,370 --> 00:50:29,760
Jekk I tħares lejn reġistru żewġ dot
PHP, dan għandu xi kodiċi PHP aktar.

1163
00:50:29,760 --> 00:50:35,410
Huwa aktar nadifa ftit, għalkemm
xorta garżi ftit twil fuq din il-linja.

1164
00:50:35,410 --> 00:50:36,260
Avviż hawn.

1165
00:50:36,260 --> 00:50:40,300
I jistampa tag HTML tiegħi, tag my head,
tag tiegħi titolu, il-kap, il-korp.

1166
00:50:40,300 --> 00:50:45,410
>> U mbagħad nibda biex ngħid
affarijiet simili jidħol fil-modalità PHP.

1167
00:50:45,410 --> 00:50:48,540
U sabiex il tag, parentesi miftuħa
Trade mark in kwistjoni PHP-- PHP jgħid,

1168
00:50:48,540 --> 00:50:53,460
ħej, server, execute-- tinterpreta
l-għalf li ġejjin bħala PHP

1169
00:50:53,460 --> 00:50:55,030
sakemm tara l-tikketta aħħar.

1170
00:50:55,030 --> 00:50:58,590
U anki jekk inti ma taf xi
PHP minbarra inti stajt tidher s'issa,

1171
00:50:58,590 --> 00:51:01,290
inti tista 'tip ta' tinqara
dan pretty intuwittivament.

1172
00:51:01,290 --> 00:51:10,670
Jekk l-isem ikun vojt, jew kumdità hija
vojta, jew dorm ikun vojt, x'għandi nagħmel?

1173
00:51:10,670 --> 00:51:12,830
What do I say lill-utent?

1174
00:51:12,830 --> 00:51:15,330
Int trid tipprovdi ismek,
kumdità, u dorm, u oħrajn.

1175
00:51:15,330 --> 00:51:17,750
Else, I say inti
reġistrata, ukoll mhux verament.

1176
00:51:17,750 --> 00:51:19,190
>> U jien ngħid mhux verament
għaliex hemm l-ebda database.

1177
00:51:19,190 --> 00:51:20,200
Jien ma tagħmel xejn mad-data.

1178
00:51:20,200 --> 00:51:22,408
Jien biss jitfg bogħod
għal skopijiet ta 'dimostrazzjoni.

1179
00:51:22,408 --> 00:51:24,320
Issa I tip ta 'skimped fuq linja 22.

1180
00:51:24,320 --> 00:51:26,400
Hemm aktar sintassi
hemm, iżda sinjal dollaru

1181
00:51:26,400 --> 00:51:28,320
jenfasizzaw il-kariga huwa tip ta 'interessanti.

1182
00:51:28,320 --> 00:51:30,300
U dan huwa dak li huwa sbieħ dwar PHP.

1183
00:51:30,300 --> 00:51:35,610
Fil PHP, inti għandek liema huma msejħa
Varjabbli globali super ftit.

1184
00:51:35,610 --> 00:51:38,430
Huma tip ta 'aktar
importanti minn fatturi varjabbli globali.

1185
00:51:38,430 --> 00:51:41,370
U dawn, kollha kapitalizzat
bħala tali, jiġu mal PHP.

1186
00:51:41,370 --> 00:51:44,550
Mela jekk għandek server li għandha
web server installati, bħal Apache,

1187
00:51:44,550 --> 00:51:49,390
u inti jinstallaw l-lingwa
appoġġ għall PHP, kollha f'daqqa inti

1188
00:51:49,390 --> 00:51:52,250
tista 'tibda tuża dawn super
varjabbli globali fil-kodiċi tiegħek.

1189
00:51:52,250 --> 00:51:54,330
>> U x'hemm sbieħ dwar
PHP hija li jekk inti biss

1190
00:51:54,330 --> 00:51:57,540
jiktbu fajl li jispiċċa fl dot
PHP, poġġih fuq web server,

1191
00:51:57,540 --> 00:52:01,260
u allura inti tippreżenta formola lilha
permezz ta 'dak tag azzjoni u formola tikketta,

1192
00:52:01,260 --> 00:52:05,110
li attribut azzjoni fil-
forma tag, PHP u l-web

1193
00:52:05,110 --> 00:52:09,360
kompletament figuri kif grab
kollha ta 'dawk pari b'valur ewlenin out

1194
00:52:09,360 --> 00:52:11,633
tal-URL simili mistoqsija
marka q ugwali qtates,

1195
00:52:11,633 --> 00:52:14,782
se figura kif q u qtates.

1196
00:52:14,782 --> 00:52:17,710
Jekk inti tissottometti ritratt, jew username,
jew password biex simili Facebook,

1197
00:52:17,710 --> 00:52:21,360
PHP se figura għalik
fejn kollha ta 'dik id-data hija.

1198
00:52:21,360 --> 00:52:23,821
U se sempliċement naħa
inti firxa assoċjattiva

1199
00:52:23,821 --> 00:52:27,560
imsejħa dollaru jenfasizzaw sinjal post,
jew sinjal dollaru jenfasizzaw tikseb,

1200
00:52:27,560 --> 00:52:30,590
skond jekk int
użu nikseb jew post sottomissjonijiet.

1201
00:52:30,590 --> 00:52:32,950
U se sempliċement naħa inti
varjabbli globali super,

1202
00:52:32,950 --> 00:52:37,254
b'tali mod li jekk inti tixtieq li tikseb fil-isem
li l-utent sottomessi permezz ta 'dak web

1203
00:52:37,254 --> 00:52:41,894
forma, inti litteralment biss jgħidu l-isem
tal-varjabbli globali super, kwotazzjoni,

1204
00:52:41,894 --> 00:52:43,380
unquote, l-isem.

1205
00:52:43,380 --> 00:52:46,144
U kwotazzjoni, kumdità unquote,
u kwotazzjoni, dorm unquote.

1206
00:52:46,144 --> 00:52:48,810
U aħna qed tmur biex tkun tista 'tagħmel
dan u għalhekk ħafna aktar ma PHP.

1207
00:52:48,810 --> 00:52:50,540
U anki jekk dan kien
t'għajn whirlwind lejn dan,

1208
00:52:50,540 --> 00:52:51,980
aħna ser adsa ħafna aktar ġimgħa d-dieħla.

1209
00:52:51,980 --> 00:52:54,247
Aħna ser jintroduċu database
sabiex inti qed attwalment

1210
00:52:54,247 --> 00:52:56,816
ser tibda timplimenta
based-- e-kummerċ tiegħek

1211
00:52:56,816 --> 00:52:59,150
bħal websajt fil-ħin eżatt ta 'ġimgħa.

1212
00:52:59,150 --> 00:53:02,750
Allura aħna ser tara inti ħin li jmiss, u
nittamaw li intom ltqajna l-messaġġi.

1213
00:53:02,750 --> 00:53:05,450
Bye.

1214
00:53:05,450 --> 00:53:06,950
>> [Daqq tal-mużika]

1215
00:53:06,950 --> 00:53:11,450

1216
00:53:11,450 --> 00:53:12,950
>> [FTUĦ DOOR]

1217
00:53:12,950 --> 00:53:14,475
>> SPEAKER 2: Hey.

1218
00:53:14,475 --> 00:53:15,350
SPEAKER 3: X'hemm up?

1219
00:53:15,350 --> 00:53:17,750
SPEAKER 2: X'Ser tagħmel?

1220
00:53:17,750 --> 00:53:19,850
SPEAKER 3: Ħidma fuq sett problema.

1221
00:53:19,850 --> 00:53:21,050
SPEAKER 2: Nizza.

1222
00:53:21,050 --> 00:53:22,550
Għolja ħamsa.

1223
00:53:22,550 --> 00:53:23,150
>> [HIGH ĦAMES]

1224
00:53:23,150 --> 00:53:25,584
>> Liema are-- uh, x'qed tagħmel hawn?

1225
00:53:25,584 --> 00:53:26,750
SPEAKER 3: Just mdendlin.

1226
00:53:26,750 --> 00:53:28,134
Just marret lura mill-ġinnasju.

1227
00:53:28,134 --> 00:53:30,050
I ma setax jgħinu iżda
Avviż meta aħna high-fived,

1228
00:53:30,050 --> 00:53:32,450
li ikollok idejk pretty rough.

1229
00:53:32,450 --> 00:53:33,950
Do inti tmur il-gym?

1230
00:53:33,950 --> 00:53:35,150
>> SPEAKER 2: Le

1231
00:53:35,150 --> 00:53:36,650
No

1232
00:53:36,650 --> 00:53:38,450
>> SPEAKER 3: Raġel, inti tfittex pretty big.

1233
00:53:38,450 --> 00:53:45,950
Li huwa ħażin, għaliex kulħadd jaf
8-ballun huwa l-bniedem kbir fuq il-kampus.

1234
00:53:45,950 --> 00:53:48,050
High-ħamsa.

1235
00:53:48,050 --> 00:53:49,550
>> SPEAKER 2: Uh, no.

1236
00:53:49,550 --> 00:53:50,450
Le, I think jien tajba.

1237
00:53:50,450 --> 00:53:52,300
I think jien tajba.

1238
00:53:52,300 --> 00:53:54,097