在创建表格,你可以使用:
<?php
session_start(); // don't forget that you need to call before output (place first, or use ob_start()
$_SESSION['formhash'] = md5(date('Y-m-d H:i:s').'2fiaSFI#T8ahugi83okkj');
?>
<form action="<?php echo $_SERVER['REQUEST_URI']; ?>" method="POST">
<input type="text" name="post" id="post" />
<input type="hidden" name="hash" id="hash" value="<?php echo $_SESSION['formhash']; ?>" />
<input type="submit" name="submit" id="submit" />
</form>
你需要检查时,有人张贴的职位要求有正确的哈希值。你可以使用:
<?php
session_start(); // don't forget that you need to call before output (place first, or use ob_start()
if (isset($_SESSION['formhash']) && isset($_POST['hash']) && $_SESSION['formhash']==$_POST['hash']) {
// treat $_POST
}
?>
设置窗体上的隐藏字段与每个负载设置一个随机值,多数民众赞成,但如果表单提交,或使用CAPCHA相比。 – 2011-05-15 15:51:34
或用javascript转义隐藏表单,所以一个机器人需要先将其忽略掉 – 2011-05-15 15:55:04