[01-08-11]Lay thong tin tu nguoi dung qua form – POST GET

7/22/2019 [01-08-11]Lay thong tin tu nguoi dung qua form POST GET

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HcPHP:Form,cchdngGETvPOSTvphnbit1

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ang xem series PHP c bn

bi: Tip tc vi hnh trnh hon chnh b bi vit v Hc PHP cho ngi mi bt u. Hm nay ta s tip tc ni

v Form hay cn gi l biu mu theo dn lp trnh. V phng thc tng tc vi ngi dng. Mt phn gp nn s

ng ca PHP so vi web thun HTML.

1.FormBiumu

Mt iu quan trng ng lu khi s dng HTML form v PHP l khi ngi dng submit form i. Th mi thng tin trong cc phn t ca form

u c PHP lu tr li, bao gm c thng tin m ngi dng nhp.

V d, form sau gm 2 hp text ngi dng nhp d liu, v mt nt submit gi form i:

Khi ngi dng in y thng tin vo form, v n nt submit. D liu trong form ny s c gi n mt file PHP pha my ch x l.

trong trng hp ny l file welcome.php:

Xt mt v d nh v ni dung m file welcome.php c th cha:

Lp trnh WEB Pht trin WEB WordPress Host & Tn min Design Nh kho Chuyn mc khc

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Like

0102030405060708091011

Name: Age:

12

converted by Web2PDFConvert.com
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Output s ta ta th ny:

Nu mnh in vo form lc u vi thng tin l Nhut v 18. Ch li trong form html pha trn cng. Trong th form c 2 gi tr m ta phich :

+ Mt l action, y l a ch n file s nhn d liu ca form.

+ Hai l method, tc phng thc truyn thng tin. C 2 cch l POST v GET. Ta s tm hiu ngay sau y.

2.$_GET

$_GET l mt hm dng ly thng tin t form s dng phng thc GET. Cng vi form html phn 1. Khi in thng tin l Nhut v 18 v

n Submit. Ngi dng s c chuyn n a ch tng t nh: http://minhnhut.info/welcome.php?fname=Nhut&age=18

Bn c thy phn ?fname=Nhut&age=18 . Qu r rng chnh l thng tin m ta nhp. N c hin th ngay a ch, chnh l

GET method.

Trong file welcome.php by gi c th s dng $_GET ly nhng d liu do ngi dng nhp , tn (name) ca cc phn t ca form s

c t ng vo tn ca n trn mng $_GET:

File welcome.php lc by gi s phi sa li nh sau ly thng tin theo kiu GET:

v form html ban u phi sa li thnh method=GET

3.$_POST

Phng thc POST, khng ging nh GET. Cc thng tin c ngi dng nhp vo s khng c hin th trong a ch m s c truyn

ngm (ngi dng khng th nhn thy) n file php ca ta. V tt nhin ly cc gi tr th ta s dng $_POST['index']. Vi indexl tn

(name) ca phn t m ngi dng nhp d liu. Nh trong v d t u bi ti gi l fname v age.

V d file welcome.php cho phng thc POST bn xem phn 1.

4.DngGEThayPOST?

Xt li th ca tng ci.

V phn POST:

vi GET d liu c truyn i s hin th thanh a ch theo dng ?bien1=giatri1&bien2=giatri2&bien3=giatri3 . iu ny s gy bt tin nu

thn tin tru n i l thn tin uan tr n nh tn n i dun ha m t khu. B n th n h chu n m t khu hin th t le ra thnh a ch

345678

Chao !
Tuoi cua ban la .

12

Chao Nhut!Tuoi cua ban la 18.

12

$_GET["fname"] -> cho ra [b]Nhut[/b]$_GET["age"] -> cho ra [b]18[/b]

12345678

Chao !
Tuoi cua ban la .

http://www.web2pdfconvert.com/?ref=PDFhttp://www.web2pdfconvert.com/?ref=PDFhttp://minhnhut.info/welcome.php?fname=Nhut&age=18


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xem? Khng c, trong trng hp ny POST l mt li th. Do bin c truyn i ngm. (Lu , vn c cc cng c gip bt cc thng tin

truyn bng POST tuy nhin khng hin th thng tin thanh a ch vn l mt li th ln).

V phn GET:

a ch s tr nn di mt t, do phi mang thm thng tin v bin (?bien1=giatri1&bien2=giatri2&bien3=giatri3 ). Nhng mt iu bn cn

phi bit l form c th truyn thng tin bng kiu GET. Nhng mun truyn thng tin bng kiu GET th khng nht thit phi dng form.

Bn c th truy cp vo file v d nh index.php?id=2 . Bn vn c th ly thng tin idt a ch bng $_GET nh thng.

T a ch dng , bn thy g cha nh? vng trong a ch ca chng ta c mt bin. l bin ng v c th thay i d dng => Ta

c th dng bin dng cho nhiu mc ch => xut ra nhiu ni dung mt cch linh hot => chnh l yu t lm nn trang web ng.

Kt lun:

Ty mc ch s dng m la chn GET hay POST.

5.$_REQUEST

Cng l mt kiu ly thng tin t ngi dng. $_REQUEST bao hm lun c $_GET v $_POST. T bn khng cn bn khun ln ln l

POST hay GET.

Lu , khi dng ci ny th bt k g c truyn qua POST hay GET u c $_REQUEST thu thp.

6.Kimtranhnggngidngnhp

Ci ny v bn bo mt, nhng cng phi ni lun. Bn nn kim tra nhng g ngi dng nhp v c truyn n file php ca bn, nu

nh bn dng cc thng tin thc hin mt s thao tc vi c s d liu, ngi dng c th c tnh chn cc m c gy thit hi cho

server ca bn. Kim tra k lng cc bin u vo, v xem xt coi c phi l form c gi t chnh trang web ca bn ch khng phi t

mt trang khc qua.

Ngoi ra bn c th dng mt on javascript nh km vi form kim tra ngay t pha ngi dng nu nh d liu truyn i khng c ng

chm g vi CSDL.

Vic c tnh nhp nhng gi liu khng hp l c th dn ti li h thng, v form khng c thc thi.

Tiu ch bo mt hng u: ng tin nhng g ngi dng nhp vo.

Ghi chXin nhc li, ton b lot bi v hc php u c nh tag hc php


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Bivi

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9. 10 l do bn nn chn my ch Linux

10. Dng API ca Adf.ly trong PHP to link kim tin hng lot

10b

newbie27/04/2013at 3:38 pm

cm n bn chia s, cho mnh hi mnh dng phng thc $_POST nhng khi mnh nhp d liu vo c cha k t & th chui ca mnh bct mt t k t & n cui chui. mnh c tm hiu trn google th mnh th qua 1 s function nh htmlspecialchars() hoc mnh str_replace

k t & thnh & nhng u ko c, bn gip mnh vi nh.Tr li Link

bich tran21/07/2013at 5:55 pm

Thanks bai viet cua a!!! e dang gap rac roi khi muon truyen du lieu giua cac trang voi nhau, a co the giup e dc ko,thanks a nhiu

Tr li Link

Minh Nht #Admin22/07/2013at 12:10 am

Rt vui v gip ch cho bn

Tr li Link

trng trng23/09/2013at 2:46 pm

localhost/product-categories.php?m=productBn cho mnh hi: nu mnh dng qua phng thc GET lm th no mnh c th c v phn bit ci product-categories.php hay

index.php. ch ci m=product th mnh lm c theo cch ca bn. Ci bin m mnh mun ly l ci *php cTr li Link

Minh Nht #Admin23/09/2013at 7:04 pm

Khng hiu bn mun lm nh vy lm g. Nhng mnh vn s ch bn cch ly tn file php ang thc thi. Trong PHP c mt

hng chui __FILE__. Hng ny tr v ng dn tuyt i n file php ang chy. C th bn echo __FILE__; s hiu.

__FILE__ tr v ng dn tuyt i, v vy cn dng hm basename(__FILE__) ly tn file ang thc thi.

Tr li Link

1 echobasename(__FILE__);

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Hix ch l mnh mun gi mt file php vo trang ch khng phi load li 100% template, nhng cc file con ca mnh trn URL ch phn bit

c qua tn file.

Bnh thng l mnh to trng Page nu trn url l:index?page=xyz th mnh s gi th ny.

if(file_exists(./.$_GET['page']..php)) {

include ./.$_GET['page']..php;

}

else {

include trangchu.php;

}

Nhng vi ci ny mnh mun n ngn gn code d truy vn nn nh bn t vn cho mnh bin i th no gi.

Nh bn gipTr li Link


Hix gi mnh mi ngh ra, chc khng dng c, vn phi thm 1 trng page= trn URL

Tr li Link


Phi vy thi bn. Cng u c sao u.

Tr li Link

Trng03/10/2013at 11:46 am

Gip mnh vi, code ny lu vi nh dng ASCI th chy nhng lu vi Unicode th php n ko ra

Tr li Link


Vn ngon m bn.

Tr li Link

Tha

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[01-08-11]Lay thong tin tu nguoi dung qua form – POST GET