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Homephp教程php手册PHP防止post重复提交数据的简单例子

在某帝国面试的时候问题了这个题: 怎么处理post提交重复的问题, 后来跟@暖阳交流,他说记录时间,我没有明白,我想的是用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,但有个问题是如果表单页面是html的呢,乍办?要不调个php验证的页面?类似验证码的功能. 还有的说用 header头设置过期时间...但没试.以下是我php写的,经测试可用.

复制代码 代码如下:


//开启session
session_start();

//如果有提交标识
if(isset($_GET['action']) && $_GET['action'] === 'save'){

 //如果有session且跟传过来的值一样才算提交
 if(isset($_SESSION['__open_auth']) && isset($_POST['auth']) && $_SESSION['__open_auth'] == $_POST['auth']){
  print_r($_POST);
  $_SESSION['__open_auth'] = null;//清空
 } else {

  //走起
  header("location: post.php");
 }
 exit();
}

//授权
$auth = $_SESSION['__open_auth'] = time();

?>



 
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