PHP ukwakha: ekilasini ekudalweni Ngokwesibonelo

Umqondo izinhlelo into-ngamakhasimende ubanzi kakhulu amathuba PHP ngenxa ngokucacile yayo, kodwa ngisho ukusebenzisa kwamanje inikeza uhlelo amathuba unlimited. PHP ukwakha design - indlela ekhethekile nekilasi (into) ebizwa ngokuthi isikhathi ngasinye yisibonelo kudalwa.

Umkhawulo wukuthi PHP isebenza ngesikhathi ikhasi. Ngesikhathi lapho ikhasi iyavuselelwa noma ukulayishwa kwelinye ikhasi kusayithi efanayo, kudingeka uhlelo izinto ezakhiwe futhi kusuka ekuqaleni.

Ukudala Ngokwesibonelo

Class Incazelo ayidingekile abe umakhi. Uma udinga ukulungiselela amagugu kokuqala lokwehlukile, ukubamba okwamanje wokudala Ngokwesibonelo ekilasini (into) ukwenza izenzo ezithile kwamanye izinto, awukwazi ukusebenzisa ekilasini PHP ukwakha le-syntax nokubhala ikhodi efanele ngaphandle izindlela ekilasini.

Ngokusho logic of into-ngamakhasimende izinhlelo isitayela, isigaba ngasinye kufanele abe umakhi ukuthi xaxa kufanele waqala kusukela abstract ekilasini kwesihlahla (ezingenalutho ngokuphelele) ukhokho. Lokhu esifuze esidlule, kunokuba umkhuba abaphendula ngokunengqondo.

Lapho lozalo iqala ekilasini abalulekile, okuyinto has idatha yayo futhi izakhiwo ezihlobene ne-idatha yangaphandle (izinto) ngaphandle umsebenzi ukwakha PHP lubaluleke.

Kulesi sibonelo, umsebenzi (umakhi) ibizwa ngokuthi ukudala (PHP ukwakha) kusukela osukwini lokushintsha Ngokwesibonelo ekilasini. It has a igama ethize futhi ubizwa ngokuthi __construct umshini kanye kuphela, lapho Ngokwesibonelo ekilasini is wadala.

Lesi sigaba sihlinzeka static variable $ iUniqueNo, ngaphandle kokuthi ngazo zonke ikhophi yale ekilasini kuyodingeka value eliyingqayizivele. Izimo amakilasi abanalutho abajwayelene ngakho ngaphandle incazelo kohlaka PHP nolwamagama enikeziwe ngunjiniyela izindlela zabo nokuxhumana.

Ifa Ukuqalisa logic

into ngayinye kufanele asebenzise injongo yayo, ukuba lokho kufanele, futhi ukwenza izinto okufanele ngizenze ukuze. Nge enengqondo ngombono Ukuqalisa enjalo ezingeni ngalinye lozalo ingase ihlanganise Ukuqalisa wababe ngamunye, ozalweni ngokuthi ezingeni.

Kulesi sibonelo, elingukhiye ikuvumela ukuba ushayele umakhi umzali :: umzali ne sezingeni lemfundzi. Isemanthikhi ilula. Okokuqala ukwenza Ukuqalisa yayo amadlozi, ke Ngokwesibonelo zamanje. Eyokuqala kulandela ukuhlakanipha kwaso, kwesibili - nezakhe.

Lapho into ngayinye ukwenza ibhizinisi, yonke le nqubo yokubethelwa ilungile futhi kuyaqondakala. Kodwa lokhu akufanele ngokuvamile ubhekwa njengomunye sivamile zonke izinhlelo zosizo.

Lozalo uhlelo letigcogcwe ngaphambilini "ukudla" ku isilinganiselo kokuqala kungase kusho ukuthi kunokuthile ofana, kodwa imikhiqizo ubisi, ikhabe, pasta nokusanhlamvu nakuba basonta isimiso esinjalo, kodwa bheka futhi zichazwe ngendlela ehluke kakhulu.

Unjiniyela kumele ukwakha into ngayinye ohlelweni lokusebenza, hhayi ku-ke ngake othile esikisela indlela. Inkinga ngamunye uhlukile, ke kuyimfuneko ukusebenzisa ku PHP umzali ukwakha - hhayi ngokuphelele.

abakhi zikahulumeni nezizimele

I umakhi okuzenzakalelayo ngale ndlela kuvamile futhi iyatholakala ukuba isetshenziswe yibo bonke inzalo. Akubalwa ibonisa umsebenzi womphakathi ukwakha, ngokwakhona, PHP uziphatha ngokungakhethi zonke echazwe njengo ezivamile.

Indlela kunengqondo ukusebenzisa elisemqoka yangasese incazelo Abaklami - ngqo yenkinga, isici inqubo yentuthuko noma uMklami okuthandayo?

Ngokombono nekutfutfuka kwelizinga umbono lozalo izinto kungavumela iyiphi imikhawulo ngenhlonipho oyise ukuba inzalo, kodwa kungakanani bacabanga ezinengqondo Kunzima ukusho, noma kunjalo, ngokomongo jikelele.

Into esaphila

Umqondo into-ngamakhasimende izinhlelo PHP ekilasini ukwakha amathuba ebanzi ngesizathu esilula ukuthi yokugcina kuphela khona ngesikhathi ikhasi, ke ivuselele noma dala enye ikhasi.

Ukubamba iqhaza nge-JavaScript AJAX isiphequluli kanye nekhodi efanele on the server kungasiza isikhathi ekuphileni lezinto, kodwa kunoma yiluphi uhlobo kuzoba isitayela elinganiselwe.

PHP inikeza ikhono iskriphti ku iseva lapho iklayenti "unqamukile" futhi "ukwamukela" iklayenti emuva iskripthi egijima ngaphambili, kodwa lo akuyona inketho lapho uhlelo into-ngamakhasimende ukusebenza C ++.

Kulo mBhalo, ungakha uhlelo oluphelele izinto okuzoba "kuze kube phakade", njengoba uhlelo lusebenze. Nokho, kuphela kungaba ngizibonge ulimi umile izinhlelo efana C ++, C #, Pascal & Delphi. zonke eyakhelwe ehlukile, baphile ngokushesha futhi ifinyelela emhlabeni ashukumisayo online.

Kusukela serialization self-ukulondolozwa

Ungathola ukulungisiswa womlando elithi "serialization" futhi ukubukeka ekuphileni kwansuku zonke umqondo wegama elithi "izindlela eliwumlingo". Kodwa konke kulula kakhulu. Nse njengoba umehluko phakathi inkululeko C ++ ku nobulukhuni the serialization C # ihlukile imiqondo banal:

• bhala into yezinhlamvu;
• funda intfo yezinhlamvu.

Wathi ozungezayo magic nezindlela wasenganekwaneni imilingo - kahle, kakhulu, kodwa kancane esisebenzayo. Izwe ulwazi ezithakazelisayo ikakhulukazi ukuthi bonke ebonakalayo, ezwakalayo futhi ezingokoqobo lingachazwa ngokuthi umbhalo elula ngalokuyincenye.

Imininingwane bekulokhu, nokuthi kuyoba yezinhlamvu uhlamvu. Kungakhathaliseki ukuthi isimo. Izinhlaka esisemthethweni izilimi izinhlelo, uphawu bemvelo wedwa - esephepheni etafuleni.

Umqondo zokuguqula into ibe string ukuze uma kudingeka, kwakunokwenzeka ukuba usuke kusuka kuleli umugqa ngaphandle kokulahlekelwa okushiwo - umqondo esiwusizo kakhulu.

Kusukela self enothi

Isemanthikhi PHP ukwakha umakhi ngaphakathi-syntax yayo alinganiselwe, kodwa uma umklami ukuthuthukisa ne isikhundla asathuthuka:

• Kuyinto isiqalo - ukudala Ngokwesibonelo ngokuphelele entsha;
• kuyinto isimo samanje - kudala Ngokwesibonelo ekhona.

PHP ukulinganiselwa ngenxa yokuthi uhlelo lezinto kukhona ngesikhathi ikhasi kuphela, bathi bazikhiphe.

Ukudala uhlelo lezinto kwetinhlavu amakhasi kusayithi yakho, ungagcina it. Ukuze kube lula, lokhu uhlelo akukhona ngempela ngokuthi serialization, thina unganciphisa kulondolozwe isimo esikhona (amafayela database), futhi lapho isidingo reconvene ekhasini elilodwa noma dala enye kusayithi efanayo, umane ukubuyisela isimo samanje ezindabeni, okuyinto sesakhiwe kakade.

Kulesisimo-ke, uhlelo nto wadala kanye kuphela, futhi ngokuhamba isayithi ke okhula nje. Ngaphansi kwalesi sikhwama, ungakwazi ukwakha uhlelo lezinto njengoba nezimo yezimo ekushintsheni.

Self-aqhubekisela into uhlelo "kukhumbula" izenzo isivakashi futhi ikhasi isimo, futhi isikhathi ngasinye siqalisa PHP, it is hhayi wadala kusuka ekuqaleni futhi esimweni sangaphambilini.