PHP kuvaka: kirasi Somuenzaniso kusikwa

Pfungwa chinhu vaifarira zvirongwa zviri zvikuru yakakura mikana PHP nokuda kwayo specificity, asi kunyange ano Implementation nayo anopa programmer risingagumi kuita. PHP kuvaka design - nzira inokosha boka (chinhu) unonzi nguva mumwe munhu Somuenzaniso akasikwa.

Limitation ndechokuti PHP kushanda panguva imwe peji. Panguva apo peji iri tazorodzwa kana akatakudza imwe peji iri chete nzvimbo, iyo inodiwa maitiro zvinhu aumba zvakare kubva muvare.

Kuunza nezveapo

Kirasi Description haina kunodiwa kuva constructor. Kana uchida kugadzirira kutanga tsika variables, kubata nguva rakasikwa boka Somuenzaniso (chinhu) kuita zvimwe zviito zvimwe zvinhu, haugoni kushandisa PHP kirasi vavake nemarongerwo uye nyora yakakodzera remitemo kunze kirasi nzira.

Maererano pfungwa chinhu vaifarira zvirongwa Style, kirasi imwe neimwe inofanira kuva constructor kuti rirege akatanga mukirasi muti chaihwoihwo (zvachose chinhu) tateguru. kakasaririra ichi chekare, pane imwe pfungwa tsika.

Kana Pedigree kunotanga kirasi chinokosha, iyo ine mashoko ayo uye zvivako chokuita nechitarisiko Data (zvinhu) pasina basa kuvaka PHP hunokosha.

In muenzaniso uyu, mashandiro (constructor) anonzi kusika (PHP vavake) musi neboka Somuenzaniso. It ane chairo zita uye rinonzi __construct muchina kamwe chete, kana boka Somuenzaniso akasikwa.

kirasi iyi inopa kunofambira mberi shanduka $ iUniqueNo, kuti dzose kopi mukirasi iyi achava akasiyana ukoshi. Zviitiko mumakirasi vane chinhu zvakafanana asi rondedzero iri PHP kuumbwa nemarongerwo inopiwa ne yokuvaka yavo kudyidzana nzira.

Nhaka initialization pfungwa

Mumwe chinhu anofanira dzika chinangwa chawo, kuti zvaaifanira, uye kuita zvandinoda. Zvakadaro zvine maonero initialization pa mumwe pamwero dzinza kungasanganisira initialization tateguru mumwe, muzukuru inonzi pamwero.

In muenzaniso uyu, shoko guru kunoita kuti kudana mubereki :: mubereki constructor pamwe ufanane mwana. Semantics iri nyore. First ndiko kuita ayo initialization tateguru, ipapo Somuenzaniso ano. Wokutanga kunotevera yayo zvisingarambiki, wechipiri - yake.

Kana mumwe chinhu ari mubasa mubhizimisi, zvinonyatsorehwa muitiro akarurama uye unonzwisisika. Asi ichi hakufaniri anowanzoonekwa chaiwo kuti zvivako zvose hurongwa.

Pedigree hurongwa anoramba "zvokudya" rokutanga rakada angava zvimwe, asi zvigadzirwa vari mukaka, visi, Pasta uye zviyo kunyange ndevenyu yakadaro hurongwa, asi vanotarisa uye zvinotsanangurwa zvakasiyana.

Developer anofanira kuvaka chinhu chimwe nechimwe pasi kushanda hurongwa, uye kwete pamusoro sei zvakanga kamwe mumwe munhu akataura. dambudziko mumwe nomumwe akasiyana, ndizvo zvinotodiwa kushandisa pamusoro PHP mubereki kuvaka - kwete Mhedziso.

Public uye pasiri Makontakta

The default constructor kwakakurumbira uye kushandiswa nevazukuru zvose. Hazvirevi hazvo kuti ruzhinji basa kuvaka, kubudikidza default, PHP anobata anotsanangurwa zvose sehwakajairika.

Sei zvine musoro kushandisa private guru iri rondedzero vagadziri - the specificity dambudziko, zvakakurumbira nedanho kukura kana programmer sarudzo?

Kubva Conceptual nemaonero Pedigree zvinhu angabvumira chero kurambidzwa noruremekedzo kumadzitateguru avo nevazukuru, asi zvakadini ari musoro pfungwa zvakaoma kutaura, zvakadaro, muna zvinonyatsorehwa chechinyorwa.

chinhu hwose

Pfungwa chinhu vaifarira zvirongwa PHP kuvaka boka rakasiyana mikana pokuti ekupedzisira chete kurarama panguva imwe peji, izvozvo kuzodzosera kumisa kana kusika mumwe peji.

Kubatanidzwa Via JavaScript AJAX Browser uye zvakakodzera bumbiro iri Server kunogona kubatsira kurebesa upenyu zvinhu, asi chero muchimiro ichava shoma maitiro.

PHP anopa kukwanisa kumhanya manyorero pamusoro Server kana nemhosva iri "vasingadiwi" uye "kugamuchira" yacho yeGmail.END_STRONG kudzokera manyorero kumhanya pamberi, asi ichi hachisi nezvechisarudzo apo chirongwa chinhu vaifarira iri rakatangwa muna C ++.

Mukupera nyaya, unogona kuvaka kwegadziriro zvinhu izvo uchava "nokusingaperi" vakakwana, sezvo purogiramu yacho uye kumhanya. Zvisinei, izvozvo chete anozvikudza munhu mira zvirongwa mutauro wakafanana C ++, C #, Pascal & Delphi. zvose akavaka zvakasiyana, kurarama nokukurumidza uye rinosvika zvakawanda mune paIndaneti nyika simba.

Kubva serialization kuti zvaichengetedza

Unogona kuwana nhoroondo kururamiswa nokuda rokuti "serialization" uye chitarisiko muupenyu hwezuva nezuva pfungwa "zvemashiripiti nzira". Asi zvinhu zvose zviri nyore zvikuru. Zvakangofanana sezvo musiyano rusununguko C ++ pamusoro kwekuoma ari C # serialization yakasiyana banal pfungwa:

• nyora chinhu kuti tambo;
• verenga chinhu kubva tambo.

komberedza zvemashiripiti uye ngano zvemashiripiti nzira vakati - yakanaka, kwazvo, asi anobatsira zvishoma. Nyika mashoko Zvinofadza kunyanya kuti zvose zvinoonekwa, anzwike uye zvaioneka anganzi nyore uye coherent rwezuva.

Information kwagara, uye achava hunhu tambo. Pasinei hunhu. Wevakadzidza hurongwa mapurogiramu mitauro, chiratidzo zvakasikwa chete - Coding tafura.

Pfungwa rokutendeutsa chinhu kuva tambo kuitira kuti kana zvakakodzera, zvakakwanisika pakurwara mutsetse uyu pasina kurasikirwa chaizvoizvo - rinoshanda zvikuru pfungwa.

Kubva kuzvida kuzvida

Semantics PHP kuvaka constructor mukati ayo nemarongerwo ishoma, asi kana akagadzira kuvaka kukura nzvimbo:

• Ndiyo kutanga - kuumba chiitiko zvachose itsva;
• ndiwo mamiriro - anosika aivapo Somuenzaniso.

PHP zvausingakwanisi nokuti kuti hurongwa zvinhu izvozvo ariko chete panguva imwe peji, ivo dzinobvisa pachavo.

Kutanga kwegadziriro zvinhu pakugadzirwa mapeji uri panzvimbo, unogona achahuponesa. Kuti zvive nyore, izvi hazvina hazvo inonzi serialization, tinogona kudzora pakuchengetedza Nezvagara Zviripo (Database mafaira), uye kana kudiwa zvasanganazve peji chete kana kusika umwe chete nzvimbo, anongoti umutse mamiriro ezvinhu, izvo kare akaumba.

Mundima iyi, chinhu gadziriro akasikwa kamwe chete, uye mukufamba nzvimbo iri chete kukura. Pasi zano iri, unogona kugadzira kwegadziriro zvinhu sevari nezviripo kuti kuchinja mamiriro.

Self-huchipfuurira. hurongwa chinhu "anoyeuka" zviito mushanyi uye chinzvimbo peji yacho, uye nguva imwe neimwe isu kumhanya PHP, haisi akasikwa muvare uye akadzorerwa yapfuura mamiriro.