Php kumanga: kalasi chilengedwe Mwachitsanzo

Ganizo chinthu wokonda mapulogalamu ndi tikulidziwa mwayi Php chifukwa cha kulunjika ake, koma ngakhale kukhazikitsa panopa izo amapereka mapulogalamu mwayi malire. Php kumanga kapangidwe - njira yapadera ya kalasi (chinthu) wotchedwa nthawi iliyonse Mwachitsanzo ndi analengedwa.

Malire ndi Php akugwira ntchito pa nthawi ya tsamba. Pa nthawi imene tsamba nditatsitsimuka kapena yodzaza tsamba lina pa malo omwewo, dongosolo chofunika zinthu anapanga kachiwiri kuchokera zikande.

Kukonza Mwachitsanzo

Maphunziro Kufotokozera si kukhala ndi constructor. Ngati mukufuna kuti akonze mfundo yoyamba ya zosintha, kugwira mphindi kulenga kalasi Mwachitsanzo (chinthu) kuchita zinthu zina pa zinthu zina, simungathe ntchito Php kalasi kumanga malembedwe ndi kulemba kachidindo yoyenera kunja njira kalasi.

Malinga ndi zomwe ananena chinthu wokonda mapulogalamu kalembedwe, aliyense kalasi ayenera constructor zambiri ayenera adayambira umboni kalasi mtengo (kanthu kwathunthu) makolo. Izi chidina zakale, osati mchitidwe zanzeru.

Pamene pedigree akuyamba kalasi kwambiri lomwe lili deta yake ndi katundu kugwirizana ndi deta Link (zinthu) popanda ntchito yomanga Php ndi chofunika kwambiri.

Mu chitsanzo ichi ntchito (constructor) amatchedwa kulenga (Php kumanga) tsiku la Mwachitsanzo kalasi. Iwo ali dzina yeniyeni ndipo amatchedwa __construct makina kamodzi kokha, pamene Mwachitsanzo kalasi analengedwa.

kalasi imeneyi ili ndi malo amodzi variable $ iUniqueNo, kuti m'zonse buku la kalasi adzakhala ndi mtengo wapadera. Nthawi ya makalasi siziyenderana kupatula malongosoledwe mu Php chimango ndi malembedwe operekedwa ndi mapulogalamu njira zawo mogwirizana.

Madalitso initialization mfundo

Aliyense chinthu ayenera kukhazikitsa cholinga chake, kuti chimene ayenera, ndi kuchita zimene ndiyenera. Woterowo wololera kaonedwe initialization iliyonse makolo mlingo zingaphatikizepo initialization aliyense kholo mbeu otchedwa mlingo.

Mu chitsanzo ichi nfundo yaikhulu limakupatsani kuitana makolo :: kholo constructor ndi msinkhu wa mwana. Manenedwe ndi yosavuta. Choyamba ndi kuchita initialization ake kholo, ndiye Mwachitsanzo panopa. Woyamba motere mfundo zake, wachiwiri - wake.

Pamene aliyense chinthu ndi chinkhoswe mu ntchito, ndondomeko akukhudzidwira ndi lolondola ndiponso yomveka. Koma zimenezi siziyenera kukhala akatswiri amaona ponseponse kachitidwe zonse zofunikira.

Pedigree dongosolo akutsutsa "chakudya" mu chiyerekezo woyamba chinthu chimodzi, koma mankhwala ndi mkaka, vembe, pasta ndipo dzinthu ngakhale iwo ali m'njira imeneyi, kwache iwo akuoneka ndi zimene mosiyana.

Mapulogalamu ayenera kumanga lililonse chinthu dongosolo ntchito, osati mmene zinali kamodzi munthu wina adaganiza. Vuto lililonse ndi wapadera, ndi chofunikira ntchito pa Php kholo kumanga - malire.

constructors boma ndi ena

The constructor kusakhulupirika ndi ofanana ndi logwiritsidwa ntchito ndi ana. Si kuti ntchito pagulu kumanga, ndi kusakhulupirika, Php amachitira onse anafotokoza monga wamba.

Kodi n'zomveka kuti ntchito nfundo yaikhulu pawekha za okonza za - ndi kulunjika vuto, mbali ya njira ya chitukuko kapena mapulogalamu zokonda?

Kuyambira mfundo cilamulo zinthu view pedigree angalole malamulo alionse ndi kulemekeza makolo awo ndi ana, koma kuchuluka ndi mfundo zomveka ndi kovuta kunena, mulimonse, kulingana wonse.

chinthu moyo

Lingaliro la chinthu wokonda mapulogalamu Php kumanga kalasi mwayi onse chifukwa yosavuta kuti yotsirizira unalipo pa nthawi ya tsamba, izo kachiwiri kukhazikitsa kapena kulenga tsamba lina.

Kutenga kudzera JavaScript AJAX osatsegula ndi malamulo oyenera pa makina zingathandize kupitiriza moyo wa zinthu, koma mwa mtundu uliwonse zidzakhala zochepa kalembedwe.

Php amapereka mphamvu kwa kuthamanga script pa makina pamene kasitomala ndi "sakukhudzidwa" ndi "kulandira" kasitomala kumbuyo kwa script akuthamanga pamaso, koma zimenezi si njira imene pulogalamu chinthu wokonda akuyendera C ++.

Zikatero, mukhoza kumanga lathunthu zochitika za zinthu zimene zidzakhala "mpaka kalekale", monga Pulogalamuyi ndi akuthamanga. Komabe, yekha akhoza kudzitama ndi n'kupuma chinenero mapulogalamu monga C ++, C #, Pascal & Delphi. onse anamanga mosiyana, moyo mofulumira ndipo kenako zambiri mu zazikulu Intaneti dziko.

Kuchokera serialization wa zitetezeke

Mungapeze kulungamitsidwa mbiri ya mawu akuti "serialization" ndi maonekedwe tsiku ndi tsiku maganizo "njira matsenga". Koma zonse ndi zosavuta. Chimodzimodzi monga kusiyana pakati pa ufulu wa C ++ pa kuuma kwa C # serialization isiyana ndi mfundo banal:

• kulemba chinthu chingwe;
• kuwerenga chinthu ku chingwe.

Anati akuzinga matsenga ndi njira lanthano zamatsenga - zokongola, mokweza, koma pang'ono zothandiza. Dziko la uthenga chidwi makamaka kuti zonse zooneka, lomveka ndi chogwirika tinganene kuti malemba yosavuta coherent.

Information wakhala, ndi kudzakhala chingwe khalidwe. Ziribe kanthu chimene chikhalidwe. The nyumba mwamwambo chabe m'zinenero mapulogalamu, chizindikiro cha chilengedwe yekha - wolemba pulogalamu tebulo.

Ganizo akatembenuka chinthu mu chingwe kotero kuti pamene kutero, izo zikanakhala zotheka kuti achire mzere uwu popanda kutaya akamanena - lingaliro kwambiri zothandiza.

Kuyambira kudziona okha

Manenedwe Php kumanga constructor mwa malembedwe ake zochepa, koma ngati mlengi kukhala ndi malo akutukuka:

• Ndi chiyambi - kulenga Mwachitsanzo watsopano kotheratu;
• ndi zikuchitika - amalenga Mwachitsanzo alipo.

zofooka Php chifukwa chakuti dongosolo la zinthu lilili yekha pa nthawi ya tsamba, iwo mupewe okha.

Kukonza dongosolo la zinthu mu mapangidwe masamba pa malo anu, mukhoza adzaupulumutsa. Pakuti kuphweka, ndondomeko izi sikuti otchedwa serialization, tikhoza asagwiritse kuteteza ndi zokhazikika (Nawonso achichepere owona), ndipo pamene kufunika reconvene tsamba kapena kulenga wina pa malo omwewo, chabe kubwezeretsa zikuchitika tsopano lino, lomwe kale anapanga.

M'nkhaniyi, dongosolo chinthu analenga kamodzi kokha, ndipo m'kupita kwa malo kusiyana basi. Pansi chiwembu, mukhoza kupanga dongosolo la zinthu monga kukhala wokonzeka kusintha kwa zinthu kusintha.

Self-akupitiriza dongosolo chinthu "amakumbukira" zochita za mlendo ndi tsamba udindo, ndipo nthawi iliyonse ife kuthamanga Php, si kulengedwa kuchokera zikande ndi kubwezeretsedwa ku boma m'mbuyomu.