重复提交数据我们在应用中经常会碰到了,今天我给各位介绍利用session来防止用户不小心重复提交数据的一个例子.
原理非常的简单,就是用session在表单页面记录下,然后提交页面判断,如果相等则视为成功,并清空session.
例子,代码如下:
- <?php
-
- session_start();
-
-
- if(isset($_GET['action']) && $_GET['action'] === 'save'){
-
-
- if(isset($_SESSION['__open_auth']) && isset($_POST['auth']) && $_SESSION['__open_auth'] == $_POST['auth']){
- print_r($_POST);
- $_SESSION['__open_auth'] = null;
- } else {
-
-
- header("location: post.php");
- }
- exit();
- }
-
-
- $auth = $_SESSION['__open_auth'] = time();
-
- ?>
- <!doctype html>
- <html>
- <head>
- <meta charset="UTF-8">
- <title>post</title>
- </head>
- <body>
- <form action="post.php?action=save" method="post">
- <ul>
- <li>
- <input type="hidden" name="auth" value="1395454119">
- <input type="text" name="userName">
- </li>
- <li>
- <input type="password" name="userpass">
- </li>
- <li>
- <input type="submit" value="走起">
- </li>
- <li>
- 1395454119 </li>
- </ul>
- </form>
- </body>
- </html>
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