我正在寻找一种方法来刷新页面时停止在数据库中插入或发送数据.
这是我的代码:
user_details_page.php
<form action="confirm_page.php" method="post" >
User Name:
<input type="text" name="username" >
User Email
<input type="text" name="useremail" >
Password:
<input type="text" name="password" >
<input type="submit" name="submit" >
</form>
confirm_page.php
if (isset($_POST['submit']))
{
$user= $_POST['username'];
$email = $_POST['useremail'];
$pass= $_POST['password'];
mysql_query("INSERT INTO table (username, useremail, email) VALUES ('$username','$useremail','$email');
}
所以问题每次我刷新确认page.php时数据都会被发送到数据库.怎么阻止这个？