Nahea PHP ngohi?

He ngohi Ko te hanganga raraunga e taea ai te wāhi kotahi ki te rokiroki etahi uara e he āhuatanga o te momo kotahi.

momo ngohi

E rua ngā momo o ngā huānga, rerekē ratou i roto i te ara o te tautuhi o te huānga Pākēha.

1. Simple - ia huānga homai reira te he taupū ki te raupapa.
2. Herekore - kua reira ki te kōrero ki te huānga te whakamahi i te mau taviri e pā ana ki te uara arorau.

I roto i ngā ohie, he mea he tāupe, e taea e neke atu i te kotahi uara. He hiahia i roto i te ngohi PHP matou.

āhuatanga āhuatanga

A feruri i taipitopito ngohi PHP:

1. e nui hei nohoanga te reira i tetahi maha o ngā uara, me he mea kau.
2. Ia o nga uara, e Kei roto he ngohi o PHP, ka karanga huānga.
3. Huānga pupuru ana momo rerekē o taurangi. Ka taea e ēnei hei aho, tau tōpu, booleans.
4. Access ki ngā āhuatanga e taea te whakamahi i taupū e te hunga i roto i te pūriki me te tau.
5. Kei PHP ngohi huānga ki taupū ahurei.
6. Ko te tokomaha o ngā āhuatanga i roto i te ngohi - ko tona roa.
7. Ka taea hoki nga uara o nga mea timatanga, kia huānga, rite he huānga maha-ahu.

He āhuatanga motuhake o PHP ko te kaha ki te hanga i tētahi ngohi i roto i te hōtuhi o tetahi whīwhiwhi.

painga:

1. Ko reira ngāwari ki te mahi tukutahi ki ngā uara maha i roto i te ngohi. E mea ohie ki te mahi i te huringa i runga i ona ngā mema ki te huri i te uara.
2. He ngāwari ki te rāwekeweke ratou. Noa tango, tāpiri tūemi ki te pānui i ranei te huri i te uara o te huānga.
3. I roto i te PHP, i reira e maha ngā mahi rerekē e tukua ki a koe hapai i huānga. He he he rapu hoki uara motuhake, kōmaka, hanumi huānga.

momo

E wehea huānga atu ki 2 momo:

• kotahi-ahu;
• e rua-ahu.

He huarahi rerekē ki te arawhiti i te ngohi. Tuatahi, whakaaroa te kuware, a ka - te PHP ngohi herekore.

TAUIRA waihanga i tētahi ngohi ohie i roto i te PHP:

I roto i te tauira e whakamahia taviri - te tau i roto i te reu [], me te nui atu - te ingoa o hua me huawhenua.

Vahe he uara huānga ngohi PHP e taea te tuhituhi rite:

• $ Huānga [n] = z;
• n - matua, z - uara.

I roto i te tikanga tuarua o te arawhiti e taea e tetahi mea ki te tohu i roto i ngā taiapa :

• $ Ingoa [] = "he";
• $ Ingoa [] = "rua";
• $ Ingoa [] = "toru".

I roto i tenei take, ka waiho i te taupū rite ki te taunoa: 0, 1 me 2.

A ka taea e koe tautapa tetahi o tona uara taupū:

• $ Ingoa [35] = 'he';
• $ Ingoa [18] = 'e rua';
• $ Ingoa [90] = "toru".

Ka taea e koe te whakakotahi i te tikanga arawhiti:

• $ Ingoa [37] = "tuatahi";
• $ Ingoa [5] = "tuarua";
• $ Ingoa [] = "te toru".

whakaritea te huānga tuatoru te ki te taupū rite ki te 38, ka rite ki 37 - te nui o te taupū.

rite tenei titiro wetereo ngohi multidimensional:

$ Ingoa [indeks1] [indeks2] ....

Na kia kite a he aha te PHP ngohi herekore. Ka taea e te taupū e he string, e kore reira tangohia here, e whakaaetia ngā wāhi, he rerekē tona roa. Kei te pai te whakamahia ngā huānga herekore i te mea e tika ana ki te hono e kore e ki tau te mea timatanga, engari ki te kupu. E huaina aho herekore - huānga e whai taupū.

I roto i te huānga herekore kotahi-ahu kei tetahi anake kī, hāngai te reira ki te taupū motuhake. Ko te pikitia i runga ko te tauira o ngā huānga herekore kotahi-ahu, me te maha-ahu.

Ka taea e koe te hanga i tētahi ngohi herekore multidimensional i te ara puāwaitanga, engari e kore e he te reira tino watea.