Tus Pib Pib Phau Ntawv Qhia rau PHP Programming

php entwickler yog kab lus hais kom ua kab lus

PHP yog ib qho kev siv dav dav siv cov lus scripting. Nws yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau kev txhim kho lub vev xaib vim tias nws muaj peev xwm ua rau hauv HTML. Txhawm rau khiav PHP tsab ntawv, tus neeg txhais lus hais kom ua kab yuav tsum tau hloov kho mus rau qhov tseeb ruaj khov version. PHP command-line scripting language yuav tsum muaj peb yam: ib webserver, ib lub web browser, thiab PHP. PHP cov kev pab cuam raug tua ntawm tus neeg rau zaub mov thiab cov zis tso tawm tso tawm hauv lub web browser.

PHP txhawb nqa ob hom kev hloov pauv: integer thiab ob. Integer yog lub platform tshwj xeeb cov ntaub ntawv hom, hos ob yog ib hom ntaub ntawv precision. Lwm hom yog hlua, uas tuaj yeem ua ib leeg-quoted lossis ob-quoted. Cov var_dump() hais kom dumps cov ntaub ntawv hais txog tus nqi tam sim no ntawm qhov sib txawv. Var_export() tso cai rau koj xa tus nqi ntawm qhov sib txawv hauv PHP code. Ib qho lus txib zoo sib xws yog print_r(), uas luam tawm tus nqi ntawm qhov sib txawv ntawm tib neeg nyeem tau.

PHP yog suav tias yog tom ntej Perl. Ntau lub vev xaib nrov thiab cov kev pabcuam siv PHP. Nws muaj lub zej zog loj ntawm cov neeg tsim khoom, ib qho kev txhawb nqa zoo heev network, thiab yog siv dawb xwb. Feem ntau cov lus sau tuaj yeem kawm tau hauv lub sijhawm luv luv. Tsis tas li ntawd, ntau yog dawb, yooj yim siv, thiab tsis tas yuav muaj cai tshwj xeeb lossis TCP chaw nres nkoj.

PHP yog ib hom lus scripting nrov rau cov vev xaib dynamic. Hnub no, tshaj kaum lab lub vev xaib siv PHP. PHP scripts feem ntau embedded rau hauv HTML, yog li cov cai khiav ntawm lub server, tsis nyob ntawm tus neeg siv lub computer. Ntxiv nrog rau kev txhim kho lub vev xaib, PHP scripting yog siv rau lwm lub hom phiaj. Cov kab lus hais kom ua ntawm PHP tso cai rau cov neeg sau ntawv sau PHP scripts yam tsis muaj qhov chaw ua tiav.

PHP yog ib qho qhib qhov chaw scripting lus

PHP yog ib qho qhib qhov chaw sau cov lus uas tau siv dav rau kev tsim cov vev xaib. Nws yog ib hom lus server-sab scripting uas ua cov lus qhia programming ntawm lub sijhawm ua haujlwm thiab rov qab cov txiaj ntsig nyob ntawm cov ntaub ntawv nws ua.. PHP feem ntau yog siv los tsim cov vev xaib dynamic, suav nrog cov ntawv thov web thiab cov khw muag khoom online. Nws feem ntau siv ua ke nrog lub web server xws li Apache, Nginx, los yog LiteSpeed.

PHP yog qhov qhib qhov chaw sau cov lus uas tuaj yeem rub tawm dawb thiab tuaj yeem ntsia tau yooj yim hauv koj lub computer. Nws txhawb ntau lub web browsers thiab sib xws nrog feem ntau ntawm cov web servers loj. Nws yog ib qho yooj yim kawm thiab siv tau yooj yim. PHP zej zog yog nquag thiab muaj ntau yam kev pab rau cov neeg tsim khoom.

PHP yog hloov tau yooj yim heev. Nws tuaj yeem yooj yim ua ke nrog lwm yam lus programming. Feem ntau siv rau PHP yog rau web servers, tab sis nws kuj tuaj yeem siv rau ntawm browser lossis kab hais kom ua. Nws yuav tshaj tawm qhov yuam kev thiab yuav txiav txim siab cov ntaub ntawv ntawm qhov sib txawv. Tsis zoo li lwm yam lus sau ntawv, PHP tsis muaj kev ruaj ntseg siab tshaj plaws, thiab tsis yog qhov zoo tshaj plaws rau kev tsim cov ntawv loj loj-raws li lub vev xaib.

PHP tau pib ua qhov project qhib thiab tau txuas ntxiv hloov zuj zus raws li ntau tus neeg nrhiav pom nws siv. Thawj version tau tso tawm hauv 1994 los ntawm Rasmus Lerdorf. PHP yog qhib qhov chaw server-sab scripting lus uas tuaj yeem kos hauv HTML. PHP feem ntau siv los tsim cov vev xaib dynamic, tswj databases, thiab taug qab cov neeg siv sijhawm. Nws kuj yog siv dav hauv web apps thiab yog sib xws nrog ntau cov databases nrov.

PHP yooj yim kawm thiab yog qhov kev xaiv nrov rau cov pib tshiab. Nws syntax yog logical thiab yooj yim to taub. Cov neeg siv tau yooj yim ua haujlwm nrog cov haujlwm thiab cov lus txib, thiab nws kuj yog ib qho yooj yim rau cov programmer los hloov nws raws li qhov xav tau.

PHP yog siv los tsim cov backend logic ntawm cov vev xaib

PHP yog ib hom lus uas muaj zog heev, thiab nws feem ntau yog siv los tsim cov backend logic ntawm cov vev xaib. Nws kuj tseem siv rau hauv kev muaj tiag virtual thiab kev txawj ntse txawj ntse. Nws kuj tseem ua haujlwm rau qee qhov kev tswj hwm cov ntsiab lus nrov tshaj plaws. Nws yog siv los tsim cov vev xaib, thiab yog qhov kev xaiv zoo tshaj plaws rau web developers.

PHP yog qhov nrov qhib qhov programming lus thiab lub moj khaum uas ua rau nws yooj yim los tsim cov ntawv thov web. Qhov qhib qhov xwm txheej ntawm PHP ua rau nws tuaj yeem hloov kho nws kom haum rau cov kev xav tau tshwj xeeb. PHP yog siv los tsim ntau qhov backend logic rau cov vev xaib, xws li WordPress. Nws kuj yog ib hom lus nrov tshaj plaws rau kev txhim kho lub vev xaib, nrog 30% ntawm txhua lub vev xaib hauv lub vev xaib siv qee hom PHP.

Lwm daim ntawv thov rau PHP yog nyob rau hauv kev sib raug zoo xov xwm. Cov vev xaib ntawm social media platforms xav tau cov lus nug ceev ceev thiab lub sijhawm thauj khoom sai tshaj plaws. PHP tuaj yeem muab cov yam ntxwv no, thiab social media sites xws li Facebook siv nws rau lawv qhov chaw. Qhov tseeb, Facebook tau txais ntau dua 22 billion tus neeg siv tshwj xeeb hauv ib hlis, yog li PHP yog qhov tseem ceeb rau lawv txoj kev vam meej.

Ntxiv rau qhov yooj yim kawm thiab siv, PHP yooj yim los tswj. Nws yog ib qho yooj yim los hloov cov cai rau lub vev xaib, thiab nws yog ib qho yooj yim rau integrate tshiab functionality. Qhov no ua rau nws yooj yim kom ua raws li cov kev xav tau ntawm koj lub lag luam. Lub backend logic ntawm cov vev xaib feem ntau yog tshwj xeeb heev, thiab PHP yog qhov kev xaiv zoo rau hom haujlwm no.

Ntxiv rau qhov ua ib hom lus muaj txiaj ntsig rau kev txhim kho lub vev xaib, PHP developers kuj yuav tsum tau paub txog PHP lub moj khaum, xws li CakePHP, CodeIgniter, thiab ntau lwm tus. Lawv kuj yuav tsum muaj kev paub txog databases, xws li MySQL thiab DB2, uas yog siv rau cov ntaub ntawv manipulation. PHP cov neeg tsim khoom feem ntau yuav tsum tau ua haujlwm ze nrog pab pawg txhim kho pem hauv ntej, raws li lawv txoj haujlwm txiav txim siab seb lub vev xaib coj li cas.

PHP yog siv rau optimizing databases

Optimizing database hauv PHP tuaj yeem pab koj txhim kho kev ua haujlwm database. Kev siv ntau txoj xov thiab caching tuaj yeem ua rau kev ua haujlwm ntawm koj daim ntawv thov thiab txo cov sij hawm uas nws tau nkag mus rau hauv cov ntaub ntawv.. Koj tuaj yeem ua kom zoo dua cov haujlwm database los ntawm kev tshem tawm cov haujlwm kev cai. Qhov no yuav txo cov sij hawm PHP yuav tsum tau sau ib tsab ntawv thiab yuav txuag ntawm kev siv nco.

Hauv PHP, muaj ob txoj haujlwm yooj yim rau optimizing databases: dba_optimize thiab dba_sync. Cov haujlwm no ua haujlwm los txhim kho cov ntaub ntawv los ntawm kev tshem tawm qhov khoob uas tsim los ntawm kev tshem tawm thiab ntxig. dba_sync muaj nuj nqi synchronizes cov ntaub ntawv ntawm disk thiab nco. Qhov no pab optimize lub database, vim tias cov ntaub ntawv tso rau hauv cov ntaub ntawv yuav raug kaw hauv lub cav lub cim xeeb, tab sis lwm cov txheej txheem yuav tsis pom lawv kom txog thaum synchronization tshwm sim.

Thaum lub database yog optimized, nws ua kom cov zaub ntawm cov ntaub ntawv thiab tuaj yeem ua rau koj lub vev xaib thauj khoom sai dua. Txawm li cas los, cov nyhuv no pom tau tsuas yog tias koj muaj cov ntaub ntawv loj. Piv txwv li, database uas muaj ntau tshaj 10,000 kab los yog ntau dua 500MB hauv qhov loj yog qhov yuav tau txais txiaj ntsig los ntawm kev ua kom zoo. Koj tuaj yeem nkag mus rau phpMyAdmin los ntawm koj cPanel los ua qhov kev ua kom zoo dua no.

Txhawm rau txhim kho kev ua haujlwm, koj yuav tsum hloov mus rau qhov tseeb version ntawm PHP. Koj tuaj yeem nrhiav cov neeg txhawb nqa tseem ceeb thiab rub tawm qhov tseeb version ntawm PHP los ntawm GitHub. Thaum lub sijhawm txheej txheem no, koj yuav tsum tsom mus rau code optimization. Piv txwv li, siv JSON cov ntaub ntawv hom hloov XML. Kuj, siv isset() es xml, raws li nws yog sai. Thaum kawg, Nco ntsoov tias koj tus qauv thiab tus tswj hwm yuav tsum muaj koj lub lag luam logic, thaum DB yam yuav tsum mus rau hauv koj cov qauv thiab cov tswj.

Muaj ntau txoj hauv kev los txhim kho PHP kom ua tau zoo dua. Siv opcode cache thiab OPcache tuaj yeem pab koj txhim kho kev ua haujlwm ntawm koj lub vev xaib. Cov tswv yim no tuaj yeem pab koj txhim kho kev ua haujlwm ntawm koj cov ntaub ntawv thiab txo lub sijhawm thauj khoom.

PHP yog siv los tsim software

PHP yog ib hom lus siv dav siv hauv kev tsim kho lub vev xaib thiab tsim software. Nws txhawb nqa ntau lub databases thiab tsim los cuam tshuam nrog ntau yam kev cai. Nws yooj yim kawm thiab muaj lub zej zog online muaj zog. Cov lus siv tau los tsim cov vev xaib loj thiab me. Nws tuaj yeem siv los tsim cov vev xaib zoo li qub thiab dynamic. Qee qhov CMS nrov tshaj plaws uas tau tswj hwm siv PHP suav nrog WordPress, Drupal, Joomla, thiab MediaWiki.

PHP yog ib hom lus muaj zog rau kev tsim cov nplooj ntawv web, eCommerce platforms, thiab sib tham sib software. PHP muaj ib txoj hauv kev taw qhia qhov khoom, uas leverages lub tswvyim ntawm cov khoom los tsim complex web applications. Kwv yees li 82% ntawm cov vev xaib siv PHP rau server-sab programming, thiab muaj ntau cov ntawv thov web-based sau hauv PHP.

PHP kuj tseem siv tau rau kev tuav cov duab. Ntau cov duab ua cov tsev qiv ntawv xws li ImageMagick thiab GD lub tsev qiv ntawv tuaj yeem ua ke nrog PHP daim ntawv thov. Nrog cov tsev qiv ntawv no, cov neeg tsim khoom tsim tau, kho, thiab txuag cov duab hauv ntau hom ntawv. Piv txwv li, PHP tuaj yeem siv los tsim cov duab thumbnail, cov duab watermark, thiab ntxiv ntawv. Nws tseem tuaj yeem tsim thiab tso saib email lossis daim foos nkag.

PHP tus qauv tsim zoo ib yam li C ++ thiab Java. Kev siv cov txheej txheem zoo yog lub hom phiaj xav tau. PHP siv cov qauv tsim los xyuas kom meej cov lej rov siv dua. Los ntawm kev siv cov qauv tsim, cov neeg tsim khoom tuaj yeem zam kev daws teeb meem tib yam nkaus. Qhov no txhais tau tias cov neeg tsim khoom tuaj yeem siv cov lej rov siv tau thiab khaws lawv cov software pheej yig thiab txuas ntxiv.

PHP yog ib qho qhib-qhov chaw server-sab ntawv sau lus uas feem ntau siv los tsim cov vev xaib thiab cov ntawv thov. Cov neeg tsim tawm tuaj yeem hloov kho PHP code hauv ntau txoj hauv kev, tso cai rau lawv rov siv dua rau lwm lub hom phiaj. Nws kuj muaj built-in mechanisms rau kev ruaj ntseg, neeg siv authentication, thiab SQL query builder. Ntxiv thiab, PHP muaj lub zog IDE uas tuaj yeem siv los tsim cov ntawv thov web thiab cov vev xaib.