首先用session將隨機生成的驗證碼的值傳到頁面,然后獲取當前文本框中輸入的值 ?進行對比;代碼如下:
?
生成的隨機數(shù),把它傳到session里面
<?
session_start(); ? 必須要先打開session開關(guān)。
$s = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9");
$r="";
for($i=1;$i<=4;$i++){
$r .= $s[rand(0,count($s)-1)];
}
$_SESSION['nb'] = $r;
?>
然后寫Ajax代碼如下:
function checkYZM(){
getXmlhttp();
xmlHttp.open("GET","chekYZM.php?YZM="+yzm.value,"false");
xmlHttp.onreadystatechange = function(){
if(xmlHttp.readyState ==4){
if(xmlHttp.status == 200){
var txt = parseInt(xmlHttp.responseText);
if(txt){
tS5.innerHTML = "驗證成功";
}else{
tS5.innerHTML = "驗證失敗";
}
}
}
}
xmlHttp.send(null);
}
?
最后在chekYZM.php頁面里進行判斷:
<?php
session_start();
if(isset($_GET['YZM'])){
$yzm = $_GET['YZM'];
if($yzm == $_SESSION['nb']){
echo"1";
}else{
echo"0";
}
}
?>
更多文章、技術(shù)交流、商務(wù)合作、聯(lián)系博主
微信掃碼或搜索:z360901061

微信掃一掃加我為好友
QQ號聯(lián)系: 360901061
您的支持是博主寫作最大的動力,如果您喜歡我的文章,感覺我的文章對您有幫助,請用微信掃描下面二維碼支持博主2元、5元、10元、20元等您想捐的金額吧,狠狠點擊下面給點支持吧,站長非常感激您!手機微信長按不能支付解決辦法:請將微信支付二維碼保存到相冊,切換到微信,然后點擊微信右上角掃一掃功能,選擇支付二維碼完成支付。
【本文對您有幫助就好】元
