刷新php时双重提交

Question

我正试图在我的脚本中纠正双重提交的问题.当我按提交时它只更新一次mysql(这就是我想要的).但是,当我点击刷新它再次更新mysql.一旦点击刷新按钮,它似乎忽略了if语句.我该怎么做才能阻止这一点

这是我的代码

if (isset($_POST['submitButton'])) { 
//do something
 }


<form action = "table.php" method="post">
<label for="submitButton"></label>
<input type="submit" name="submitButton" id="submitButton"
value="Submit Form"/>
</form>

Answer 1

当您刷新页面时 - POST再次出现

有些浏览器实际上警告过你这件事.

为了防止我这样做:

if (isset($_POST['submitButton'])) { 
//do something

//..do all post stuff
header('Location: thisPage.php'); //clears POST
}


<form action = "table.php" method="post">
<label for="submitButton"></label>
<input type="submit" name="submitButton" id="submitButton"
value="Submit Form"/>
</form>

Answer 2

我使用会话来防止重新发布。

session_start();

 if( isset($_SESSION['your_variable']) && 
     $_SESSION['your_variable'] == $_POST['your_variable'] ){
    // re-post, don't do anything. 
 }
 else{
    $_SESSION['your_variable'] = $_POST['your_variable'];
    // new post, go do something.
 }