Php lonse variable cha kugwira ntchito. Kupanga variable lonse mu Php

Kuti akonze malo full, omwe ali magwiridwe yotakata muyenera kudziwa kwambiri. Koma chimene chingapangitse iye wapadera - ndi Php. The variable padziko lonse chinenero mapulogalamu si ntchito zambiri, koma nthawi zina kudziwa momwe ntchito, nthawi zina m'pofunika. Kuti ndi kuphunzira ndi zimene ndiponso mmene ntchito, ife kuchita m'nkhani ino.

kuchuluka

Choncho kuyitana nkhani imene variable ndi zotsimikizika. Nthawi zambiri, iwo ndi kuchuluka chimodzi chokha. Pamene Php zosintha lonse yodzaza kwa owona ena, ndiye kungakhale Ponena (zikuphatikizapo) ndi chofunika (amafuna).

Ndi kusakhulupirika, iwo okha m'deralo ntchito ukulu. Ndipo momwe kuti variable anawona owona mu malire ake, chimene chingalowe ndi ntchito? Kuti zimenezi zitheke, ndipo amaperekedwa mu Php zosintha lonse.

Nfundo yaikhulu "padziko lonse"

Ndipo apa pali m'mene yolengeza variable lonse Php? Kukwaniritsa zolinga zimenezi kudzatithandiza mawu akuti "dziko lonse". M'pofunika ikani patsogolo pa variable kuti mukufuna kupanga lonse (narimer, lonse «The variable").

Pambuyo kukhazikitsa zoterezi zikusonyeza deta adzatha kugwira ntchito ndi wapamwamba aliyense. Ngati penapake pali maumboni variable izi, dongosolo nthawizonse tcheru pa Baibulo lonse.

Chifukwa chinenero chachilendo? chakuti nthawi yomweyo pangakhale Mabaibulo m'deralo. Koma iwo lidzakhala lilipo yekha kwa owona kumene analengeza. Ndipo kwa ena onse adzachita zosintha lonse Php kalasi. Choncho muyenera kukhala osamala. Ndipo panali Mosakayikira, apa ndi chitsanzo cha mmene akuonekera: lonse.

Chifukwa ngati file wina ndi mwayi kuti chiwerengero cha zosintha, izo adzachititsa iwo nkhondo. Koma sitingathe motsimikiza - m'deralo kapena lonse variable ndi kuwerenga kapena palimodzi kwalephera. Choncho, ngati kulembetsa mu ntchito yake, ayenera kukhala palibe vuto. Koma ntchito variable kwa malire ake kuti mabvuto. Choncho, dongosolo la drafting pa malamulo zofunika kuwayang'anira mosamala ndipo onetsetsani kuti palibe pali ngakhale chofunika kwa nkhondo anati anauka.

Wina iyeyo kujambula

Kodi n'zotheka mu Php kulenga variable lonse mu njira yina? Inde, ngakhale imodzi. Choyamba, tiyeni tikambirane $ GLOBALS. Ili ndi dongosolo lomenyera associative. Chinsinsi izo - ndi dzina. Monga mtengo wa nkhani amachita ngati variable lonse. Tikumbukenso kuti khamu pambuyo kulengeza alipo akukhudza aliyense. Ichi chimapereka chifukwa mukhulupirire izo superglobal. Izo zikuwoneka kuti: $ GLOBALS [ 'variable'].

Predefined / superglobals

Mu chinenero chirichonse mapulogalamu pali ena mayina inachita hayala ena ntchito zake. Choncho, kulenga mwa Php zosintha lonse la dzina yemweyo sizigwira ntchito.

chinenero mapulogalamu makhalidwe yake. Choncho, n'kofunika kuti predefined zosintha apa si khazikitsa "wapamwamba," ndiko kuti, palibe ku malo onse. Kodi ndingatani kuti kukonza? Kuti predefined zosintha analipo pa malo m'dera, ziyenera ananena motere :. Global «variable" Zikuoneka kuti mofanana pamaso anandiuza, pomwe? Izo ndi zoona, koma osati kwambiri. Tiyeni tione kale "kumenyana" chitsanzo:

• $ Lonse HTTP_POST_VARS;
• sakusiyana $ HTTP_POST_VARS [ 'dzina'].

Inu mukumverera kusiyana pakati pawo? Taonani kuti Php zosintha lonse sindiye kuti zizigwiritsidwa ntchito mwa kugwira ntchito. Angathe adzaikidwa mu file limene m'gulu izo.

Links ndi chitetezo

Monga mukuonera, mu Php kulenga variable lonse si vuto. Koma kodi pali chilichonse makamaka limasonyeza wachibale? Inde, pangakhale khalidwe zosayembekezereka ntchito padziko lonse. Koma izo zisanachitike, ndi backstory pang'ono.

Mu Baibulo 4.2.0 mwachibwana ndi kusakhulupirika register_globals anasintha kuchokera pa boma ku kutali. Kwa anthu ambiri, izi si zofunika kwambiri, koma pachabe. Ndipotu, likukhudza chitetezo cha mankhwala olemera. Ngati mukufuna kuti variable lonse, Php-langizo pa chizindikiro ichi siwokhuzidwa. Komabe, ntchito pachithunzichi akhoza kale kulenga precedents chitetezo.

Choncho ngati register_globals ndi anatembenukira, pamaso pa kuphedwa kwa malamulo olembedwa initialized ndi zosintha zosiyanasiyana zimene akufunika, mwachitsanzo kutumiza mitundu HTML. Choncho, anaganiza kutembenukira izo.

N'chifukwa chiyani boma la malangizo mu Php variable lonse alitcha kwambiri? mfundo ndi yakuti pamene boma la kutukula ayi zonse motsimikiza akhoza okha kuyankha funso kumene anachokera. Pa dzanja limodzi, n'kosavuta kulemba code. Koma ena - ndi chitetezo chiopsezo. Choncho, kuti asalakwitse, komanso deta kuyanjana ndi malangizo wakhala olumala.

Tsopano tiyeni tiyang'ane osati / otetezeka code, komanso mmene kudziwa nthawi imene kulengezedwa kwa padziko lonse Php variable limodzi ndi ankafuna tampering deta. Izi ndi zofunika kuti kulenga wokongola osati kokha, komanso likunena malo musati osokoneza woyamba alipo munthu ntchito.

kachidindo njiru

Tiyeni anakhazikitsa variable ndi zoona kwa anthu amene udindo:

ngati (authenticate_user ()) {
$ Chinkalimbikitsa = woona;
}

ngati ($ Chinkalimbikitsa) {
monga "/highly/sensitive/data.php";
}

Mmenemonso, variable akhoza anapereka basi. Poganizira deta akhoza kungoyankha m'malo, ndi gwero la anachokera sipakhala, ndiye aliyense akhoza mayeso amenewa ndi kunamizira munthu wina. Ngati anakhumba, ndi tizilomboto (kapena kungofuna kudziŵa koma achibwana munthu) mododoma, logic wathu.

Ngati ife kusintha mtengo wa langizo la, malamulo ntchito molondola, monga ife chofunika. Koma initialization wa zosintha si mawu abwino mu mapulogalamu, komanso amatipatsa chitsimikizo ena a mtendere wa script lapansi.

Odalirika buku la code

mukhoza kuzimitsa kapena ntchito malangizo kapena mankhwala kachidindo zovuta kwambiri kukwaniritsa cholinga ichi. Mwachitsanzo, ngati izi:

ngati (isset ($ _ Gawo [ 'lolowera'])) {

Echo "Hello {$ _ Gawo [ 'lolowera']} ";

} Enanso {

Echo "Hello Mlendo
";
sakusiyana "Welcome me!";

}

Kupanga M'MALO mu nkhani iyi, kudzakhala kovuta. Koma - zotheka. Kuti tichite zimenezi, muyenera kusamalira kuti mofulumira zida ayankhe anagawidwa. Ngati mukufuna monga zosintha lonse mu Php, mungathe kugwiritsa ntchito zipangizo zotsatirazi: ngati tikudziwa zimene osiyanasiyana ndi phindu analandira n'zotheka kulembetsa ndi script kukayendera ndi machesi. Ndithudi, izo sizitanthauza chitetezo zonse kutsatira M'MALO. Koma ndizo options kwambiri kwambiri kusokoneza.

Apeza ankafuna masquerade

Tiyeni tiwone momwe inu mukumvetsa olembedwa kale. Mu Php zosintha padziko lonse kugwira ntchito kuti adzapatsidwa pansipa, muyenera kulengeza nokha. Tikhoza kunena kuti ichi ndi mtundu homuweki pa kuloŵerera kwa phunziro mutu. Nawu code:

ngati (isset ($ _ keke [ 'C_COOKIE'])) {
} Elseif (isset ($ _ BWINO [ 'C_COOKIE']) || isset ($ _ POST [ 'C_COOKIE'])) {

makalata ( "administrarot@example.com", "Khutu, zilembo chinalembedwa cholinga kuba m'nyumba ndi tampering deta" $ _SERVER [ 'REMOTE_ADDR']);
sakusiyana "Panali chitetezo wosweka kapena kuyesa kutero analidziwitsa mkuluyu.";
kuchoka;

} Enanso {
}
?>

Tsopano kufotokoza thereto. Mwina C_COOKIE timapeza kuchokera odalirika. Kuti kukwanira bwinobwino monga zotsatira kuyembekezera, ife onani phindu lake ndi awadziwitse woyang'anira mu nkhani ya mavuto. Ngati izo sizifika, ndiye palibe kanthu ndipo sanafune kuti. Muyenera kumvetsetsa kuti chabe disabling malangizo register_globals sizikupanga code yanu ndi otetezeka. Choncho, variable aliyense amene walandira script kwa wosuta, zifunike phindu kuyembekezera.

Pomaliza

Apa, ambiri, ndi zonse muyenera kudziwa za zosintha lonse bwinobwino mosamala ntchito nawo ntchito. Kumene, kunena kuti pali chitsimikizo chonse kuti palibe wina ntchito iwo sangakhoze - nkhondo mowirikiza kuwongolera njira ndi luso lawo. Choncho zofunika kuchepetsa ntchito pazipita zosintha lonse code. Mwamwayi, kapangidwe ndi kapangidwe ka chinenero mapulogalamu akhoza kukwaniritsa cholinga ichi. Zabwino zonse!