ajax refresh code_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2022-12-19 17:04 出处：网络

I need some ajax code to assign value to a session for example $_SESSION[\'verif_code\'] i am generating a random number to assign value to this session

相关专题：javascript php

I need some ajax code to assign value to a session

for example

$_SESSION['verif_code']

i am generating a random number to assign value to this session

开发者_高级运维

i need some ajax code to refresh this random number function and assign value to this session.

does any one have an idea please share it with me

Thanks

You would have to replace all commented out sections with your own code, but here is a generalized template for AJAX requests.

Inside of your HTML/PHP file, where the AJAX will take affect.

<html>
<body>
<input type="submit" onclick="generateCaptcha()">
<div id="captcha">Your captcha div</div>
</body>
</html>

Your Javascript code to call the AJAX request.

var xmlhttp;

function generateCaptcha()   {
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null) {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="yourfile.php"; // file to send the AJAX request too, see below
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function stateChanged()  {
if (xmlhttp.readyState==4) { // success.
   // generate your new captcha
 }
}

function GetXmlHttpObject() {
if (window.XMLHttpRequest) {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject) {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}

Your PHP file inside of the AJAX call, named yourfile.php will process the data returned and will do whatever data manipulation is needed back to your div element without a page refresh.

Take an overview of AJAX Tutorial before you jump into things.