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>> PROFESSUR: Ejja jikteb programm li
iżomm rekord ta 'kif ħafna drabi utent

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żaret paġna web, u b'hekk
turi kif tista 'tuża l-PHP

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karatteristika magħrufa bħala sessjoni.

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Ejja tibda mill-ewwel tagħti ħarsa
fil-HTML li stajt ippreparat

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javvanzaw hawn.

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Avviż li I poġġew fil-korp ta '
din il-paġna l-istqarrija, għandek

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żar is-sit dan ħafna drabi,
li biha dan ħafna se tkun l-

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riżultat ta outputting varjabbli li l-
apparentement, kienet dollaru sinjal counter.

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>> Issa, fil-quċċata ta 'dan il-fajl stajt
ħalla xi spazju bejn tag miftuħ

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u tag magħluqa għal xi kodiċi PHP.

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Ejja issa tibda sessjoni minn
jispeċifikaw dan li ġej.

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Session_start u ssejjaħ
dik il-funzjoni.

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Dak li sempliċiment ma huwa jinforma PHP
li nixtieq li jibdew jużaw

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Sessjoni sabiex il-super globali, dollaru
jiffirmaw sessjoni jenfasizzaw, huwa

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disponibbli għalija.

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U PHP u l-web server se,
Għalhekk, magically jieħdu ħsieb ta 'kif

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dak il-varjabbli huwa attwalment implimentata
quddiem u lura bejn klijent u

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server, b'xi jużaw cookies.

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>> Iżda fil-kodiċi, dak I jmiss trid tagħmel
hija xi ħaġa simili li ġej.

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Ewwelnett, ejja jiċċekkjaw jekk hemm diġà
sett varjabbli f'sessjoni tiegħi.

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Jekk huwa stabbilit dollaru underscore sinjal
sessjoni quote counter unquote.

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Fi kliem ieħor, jien ser tuża l-
sessjoni super globali biex jaħżnu ċ-ċavetta,

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imsejħa wkoll counter, li l-valur huwa
se jkun in-numru totali ta 'drabi

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li l-utent ikun żar is-sit tiegħi, u
I ser grab dak il-valur meħtieġ u mqiegħda

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huwa fil-varjabbli lokali tiegħi, dollaru
sinjal counter, sabiex

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juru dak il-valur.

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>> Sussegwentement, jekk dan muftieħ huwa tabilħaqq stabbilit bi
valur, jien ser imorru quddiem u grab

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dak il-valur ma counter sinjal dollaru gets
sessjoni underscore sinjal dollaru

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quote bracket open counter unquote
virgola parentesi magħluqa.

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Jekk dak il-varjabbli ma tiġix stabbilita, ejja
sempliċiment initialize counter mal-

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valur żero.

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Sadanittant, l-ebda kwistjoni x'jiġri up
hemm, ejja taġġorna sinjal dollaru

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jenfasizzaw sessjoni unquote quote counter
li jkun x'ikun din lokali

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varjabbli huwa plus 1.

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>> I pretensjoni, issa, permezz ta 'din il-fergħa u
daqsxejn ta 'aritmetika, I vais

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jibdew jingħaddu kif ħafna drabi l-
utent ikun żar din il-paġna.

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Ejja tagħti ħarsa.

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Ejja tiffranka l-fajl u tiftaħ
it up fil-browser.

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>> Ejja żur
http://localhost/counter/php.

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Din hija l-ewwel darba jien hawn hekk,
tabilħaqq, I żar is-sit żero darbiet.

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Imma ejja issa jerġgħu jitgħabbew, ejja issa rikarigu,
ejja issa jerġgħu jitgħabbew, u bħala

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mistenni, I issa stajt żar dan is-sit
mhux żero, iżda tliet darbiet.

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