Upangiri Woyambira pa PHP Programming

php entwickler ndi chilankhulo cholemba pamzere wamalamulo

PHP ndi chilankhulo chogwiritsidwa ntchito kwambiri polemba gwero lotseguka. Ndizothandiza makamaka pakukula kwa intaneti chifukwa cha kuthekera kwake kuyikidwa mu HTML. Kuti mugwiritse ntchito PHP script, womasulira mzere wolamula ayenera kusinthidwa kukhala mtundu waposachedwa wokhazikika. PHP command-line scripting language imafuna zigawo zitatu: webserver, msakatuli, ndi PHP. Mapulogalamu a PHP amachitidwa pa seva ndipo zotsatira zake zikuwonetsedwa mu msakatuli.

PHP imathandizira mitundu iwiri yamitundu yosiyanasiyana: chiwerengero ndi kawiri. Integer ndi mtundu wa data wapapulatifomu, pomwe pawiri ndi mtundu umodzi wolondola wa data. Mtundu wina ndi chingwe, zomwe zingathe kutchulidwa kamodzi kapena kawiri. The var_dump() Lamulo limataya zambiri za mtengo wapano wa kusintha. Var_export() amakulolani kutumiza mtengo wa kusintha kwa PHP code. Lamulo lofanana ndi print_r(), zomwe zimasindikiza mtengo wosinthika mu mawonekedwe owerengeka ndi anthu.

PHP imatengedwa kuti ndi Perl yotsatira. Mawebusayiti ambiri otchuka amagwiritsa ntchito PHP. Ili ndi gulu lalikulu la omanga, network yabwino yothandizira, ndipo ndi yaulere kugwiritsa ntchito. Zinenero zambiri zolembera zimatha kuphunziridwa m'kanthawi kochepa. Komanso, ambiri ali mfulu, yosavuta kugwiritsa ntchito, ndipo safuna mwayi wapadera kapena madoko a TCP.

PHP ndi chiyankhulo chodziwika bwino cha zolemba pamasamba osinthika. Lero, masamba opitilira mamiliyoni khumi amagwiritsa ntchito PHP. Zolemba za PHP nthawi zambiri zimaphatikizidwa mu HTML, kotero code imayenda pa seva, osati pa kompyuta ya kasitomala. Kuwonjezera pa chitukuko cha intaneti, PHP scripting imagwiritsidwa ntchito pazinthu zina. Mtundu wamalamulo wa PHP umalola olemba mapulogalamu kulemba zolemba za PHP popanda malo athunthu.

PHP ndi chilankhulo chotseguka cholembera

PHP ndi chilankhulo chotseguka cholembera chomwe chimagwiritsidwa ntchito kwambiri pomanga mawebusayiti. Ndi chinenero cha seva-side scripting chomwe chimapereka malangizo a mapulogalamu pa nthawi yothamanga ndi kubweza zotsatira kutengera deta yomwe imapanga.. PHP nthawi zambiri imagwiritsidwa ntchito popanga mawebusayiti amphamvu, kuphatikiza mapulogalamu apaintaneti ndi masitolo apaintaneti. Nthawi zambiri amagwiritsidwa ntchito limodzi ndi seva yapaintaneti monga Apache, Nginx, kapena LiteSpeed.

PHP ndi chinenero chotsegula cholembera chomwe mungathe kutsitsa kwaulere ndipo chikhoza kuikidwa pa kompyuta yanu mosavuta. Imathandizira asakatuli ambiri ndipo imagwirizana ndi ma seva akuluakulu ambiri. Ndi yosavuta kuphunzira ndi yosavuta kugwiritsa ntchito. Gulu la PHP likugwira ntchito ndipo limapereka zothandizira zambiri kwa omanga.

PHP ndi yosinthika kwambiri. Itha kuphatikizidwa mosavuta ndi zilankhulo zina zamapulogalamu. Zomwe zimagwiritsidwa ntchito kwambiri pa PHP ndi ma seva apa intaneti, koma itha kugwiritsidwanso ntchito pa msakatuli kapena mzere wolamula. Idzanena zolakwa ndipo idzadziwiratu mtundu wa data wa variable. Mosiyana ndi zilankhulo zina zolembera, PHP sapereka mulingo wapamwamba kwambiri wachitetezo, ndipo si yabwino kupanga mapulogalamu akuluakulu ozikidwa pa intaneti.

PHP idayamba ngati pulojekiti yotseguka ndipo ikupitilizabe kusinthika pomwe anthu ambiri adapeza ntchito zake. Baibulo loyamba linatulutsidwa mu 1994 ndi Rasmus Lerdorf. PHP ndi chilankhulo chotseguka cha seva-side scripting chomwe chitha kuphatikizidwa mu HTML. PHP nthawi zambiri imagwiritsidwa ntchito popanga mawebusayiti amphamvu, kuyang'anira ma database, ndi kutsatira magawo a ogwiritsa ntchito. Imagwiritsidwanso ntchito kwambiri mu mapulogalamu a pa intaneti ndipo imagwirizana ndi nkhokwe zambiri zodziwika.

PHP ndiyosavuta kuphunzira ndipo ndi chisankho chodziwika bwino kwa oyamba kumene. Mawu ake ndi omveka komanso osavuta kumva. Ogwiritsa ntchito amatha kugwira ntchito mosavuta ndi ntchito ndi malamulo, ndipo ndizosavuta kwa opanga mapulogalamu kuti asinthe momwe amafunikira.

PHP imagwiritsidwa ntchito popanga malingaliro akumbuyo amasamba

PHP ndi chilankhulo champhamvu cholembera, ndipo nthawi zambiri amagwiritsidwa ntchito popanga malingaliro akumbuyo kwa mawebusayiti. Amagwiritsidwanso ntchito mu zenizeni zenizeni komanso ntchito zanzeru zopangira. Imaperekanso mphamvu pazinthu zina zodziwika bwino zoyendetsera zinthu. Amagwiritsidwa ntchito kupanga mawebusayiti, ndipo ndi chisankho chabwino kwambiri kwa opanga mawebusayiti.

PHP ndi chilankhulo chodziwika bwino chotsegulira magwero komanso chimango chomwe chimapangitsa kukhala kosavuta kupanga mapulogalamu apa intaneti. Mtundu wotseguka wa PHP umapangitsa kuti zitheke kusintha kuti zigwirizane ndi zofunikira zina. PHP imagwiritsidwa ntchito kupanga malingaliro ambiri am'mbuyo amasamba, monga WordPress. Ndi chimodzi mwa zilankhulo zotchuka kwambiri pakukula kwa intaneti, ndi 30% pamasamba onse pa intaneti pogwiritsa ntchito mtundu wina wa PHP.

Ntchito ina yodziwika bwino ya PHP ili m'malo ochezera a pa Intaneti. Mawebusaiti amasamba ochezera amafunikira mafunso ofulumira pa database komanso nthawi yotsitsa yothamanga kwambiri. PHP ikhoza kupereka izi, ndi malo ochezera a pa Intaneti monga Facebook amagwiritsa ntchito malo awo. Pamenepo, Facebook imalandira zambiri kuposa 22 ogwiritsa ntchito mabiliyoni apadera pamwezi, kotero PHP ndiyofunikira kuti apambane.

Kuphatikiza pa kukhala kosavuta kuphunzira ndi kugwiritsa ntchito, PHP ndiyosavuta kusamalira. Ndikosavuta kusintha kachidindo katsamba lawebusayiti, ndipo ndizosavuta kuphatikiza magwiridwe antchito atsopano. Izi zimapangitsa kukhala kosavuta kuti mukwaniritse zosowa za bizinesi yanu. Malingaliro am'mbuyo amasamba nthawi zambiri amakhala apadera kwambiri, ndipo PHP ndi chisankho chabwino cha mtundu uwu wa ntchito.

Kupatula kukhala chinenero chothandiza pa chitukuko cha intaneti, Madivelopa a PHP amafunikiranso kuti azidziwa bwino ma PHP, monga CakePHP, CodeIgniter, ndi ena ambiri. Ayeneranso kukhala ndi chidziwitso cha database, monga MySQL ndi DB2, zomwe zimagwiritsidwa ntchito kusokoneza deta. Opanga PHP nthawi zambiri amafunikira kuti azigwira ntchito limodzi ndi gulu lakutsogolo lakutsogolo, momwe ntchito yawo imatsimikizira momwe tsamba lawebusayiti limakhalira.

PHP imagwiritsidwa ntchito kukhathamiritsa ma database

Kukonza database mu PHP kungakuthandizeni kukonza magwiridwe antchito a database. Kugwiritsa ntchito ma multi-threading ndi caching kumatha kukulitsa magwiridwe antchito a pulogalamu yanu ndikuchepetsa kuchuluka kwa nthawi yomwe imayenera kufikira database.. Mutha kukhathamiritsanso magwiridwe antchito a database pochotsa magwiridwe antchito. Izi zichepetsa kuchuluka kwa nthawi zomwe PHP imayenera kupanga script ndikusunga pakugwiritsa ntchito kukumbukira.

Mu PHP, pali ntchito ziwiri zofunika kukhathamiritsa nkhokwe: dba_optimize ndi dba_sync. Izi zimagwira ntchito kukhathamiritsa nkhokwe pochotsa mipata yopangidwa ndi zochotsa ndi zoyika. Ntchito ya dba_sync imagwirizanitsa nkhokwe pa disk ndi kukumbukira. Izi zimathandiza kukhathamiritsa database, chifukwa zolemba zomwe zayikidwa zitha kusungidwa mu kukumbukira kwa injini, koma njira zina sizidzawawona mpaka kulunzanitsa kuchitike.

Pamene database yakonzedwa, imafulumizitsa kuwonetsera kwa deta ndipo ikhoza kupangitsa kuti tsamba lanu liziyenda mofulumira. Komabe, izi zimawonekera pokhapokha ngati muli ndi database yayikulu. Mwachitsanzo, database yomwe ili ndi zambiri kuposa 10,000 mizere kapena yoposa 500MB kukula ndizotheka kupindula ndi kukhathamiritsa. Mutha kupeza phpMyAdmin kuchokera ku cPanel yanu kuti mukwaniritse izi.

Kupititsa patsogolo ntchito, muyenera kukweza ku mtundu waposachedwa wa PHP. Mutha kupeza omwe akuthandizira ndikutsitsa mtundu waposachedwa wa PHP kuchokera ku GitHub. Panthawi imeneyi, muyenera kuyang'ana pa kukhathamiritsa kwa ma code. Mwachitsanzo, gwiritsani ntchito mitundu ya data ya JSON m'malo mwa XML. Komanso, kugwiritsa ntchito() pa xml, momwe zimakhalira mwachangu. Pomaliza, Kumbukirani kuti mtundu wanu ndi wowongolera ayenera kukhala ndi malingaliro abizinesi yanu, pomwe zinthu za DB ziyenera kulowa mumitundu yanu ndi owongolera.

Pali njira zambiri zokometsera PHP kuti muchite bwino. Kugwiritsa ntchito cache ya opcode ndi OPcache kungakuthandizeni kukonza magwiridwe antchito a intaneti. Njira izi zitha kukuthandizani kukhathamiritsa magwiridwe antchito a database yanu ndikuchepetsa nthawi yolemetsa.

PHP imagwiritsidwa ntchito popanga mapulogalamu

PHP ndi chiyankhulo chomwe chimagwiritsidwa ntchito kwambiri popanga intaneti komanso kupanga mapulogalamu. Imathandizira ma database angapo ndipo idapangidwa kuti igwirizane ndi ma protocol osiyanasiyana. Ndiosavuta kuphunzira ndipo ili ndi gulu lamphamvu pa intaneti. Chilankhulochi chingagwiritsidwe ntchito popanga mawebusayiti akulu ndi ang'onoang'ono. Itha kugwiritsidwa ntchito kupanga mawebusayiti osasunthika komanso osinthika. Ena mwa CMS otchuka omwe amayendetsedwa ndi PHP akuphatikizapo WordPress, Drupal, Joomla, ndi MediaWiki.

PHP ndi chilankhulo champhamvu popanga masamba, nsanja za eCommerce, ndi mapulogalamu othandizira. PHP ili ndi njira yolunjika pa chinthu, zomwe zimathandizira lingaliro la zinthu kupanga zovuta kugwiritsa ntchito intaneti. Pafupifupi 82% Mawebusayiti amagwiritsa ntchito PHP pamapulogalamu am'mbali mwa seva, ndipo pali mapulogalamu ambiri ozikidwa pa intaneti olembedwa mu PHP.

PHP ndiyothandizanso pakugwiritsa ntchito zithunzi. Ma library osiyanasiyana opangira zithunzi monga ImageMagick ndi laibulale ya GD amatha kuphatikizidwa ndi mapulogalamu a PHP. Ndi malaibulale awa, opanga akhoza kulenga, sinthani, ndi kusunga zithunzi m'njira zosiyanasiyana. Mwachitsanzo, PHP ikhoza kugwiritsidwa ntchito kupanga zithunzi zazithunzi, zithunzi za watermark, ndi kuwonjezera malemba. Itha kupanganso ndikuwonetsa imelo kapena mawonekedwe olowera.

Mapangidwe a PHP ndi ofanana ndi C ++ ndi Java. Kugwiritsa ntchito code yokonzedwa bwino ndi cholinga chofunikira. PHP imagwiritsa ntchito mapangidwe apangidwe kuti iwonetsetse kuti ma code akugwiritsidwanso ntchito. Pogwiritsa ntchito mapangidwe apangidwe, opanga amatha kupewa kuthetsa mavuto omwewo mobwerezabwereza. Izi zikutanthauza kuti Madivelopa atha kugwiritsa ntchito ma code osinthika ndikusunga mapulogalamu awo kukhala otsika mtengo komanso owonjezera.

PHP ndi chilankhulo chotseguka cha seva-side scripting chomwe chimagwiritsidwa ntchito popanga masamba ndi mapulogalamu. Madivelopa amatha kusintha ma code a PHP m'njira zosiyanasiyana, kuwalola kuti azigwiritsanso ntchito pazifukwa zosiyanasiyana. Ilinso ndi njira zopangira chitetezo, kutsimikizika kwa ogwiritsa ntchito, ndi SQL query builder. Kuphatikiza apo, PHP ili ndi IDE yamphamvu yomwe ingagwiritsidwe ntchito kupanga mawebusayiti ndi mawebusayiti.