Ajax submit form when verification code automatically verify PHP back-end Verification code detection _php instance

This article through the source to show how to implement the form submission, verify the code first detection correctness, incorrect is not submit the form, update the verification code.

1, front-end code index.html

 <! DOCTYPE html>  

2, back-end verification code detection checkcode.php

 <?php
/** *
User Verification Code verification file
* @Author: Zjmainstay
* @version: 1.0
* @creatdate: 2013-10-4
session_start ();
echo json_encode (Array (' status ' => (int) ($_session["checkcode"] = = $_post[' code '));
Exit 

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