PHP 양식 보안 확인을 보여주는 예

<form action="do.php" method="POST">
<?php $module=mt_rand(100000,999999);?>
 <input type="text" name="sec_name" value=""/>
 <input type="hidden" name="module" value="<?php echo $module;?>"/>
 <input type="hidden" name="timestamp" value="<?php echo time();?>"/>
 <input type="hidden" name="token" value="<?php echo md5($module.&#39;#$@%!^*&#39;.time());?>"/>
</form>

<?php
$module = $_POST[&#39;module&#39;];
$timestamp = $_POST[&#39;timestamp&#39;];
$token = md5($module.&#39;#$@%!^*&#39;.$timestamp);
if($token != $_POST[&#39;token&#39;]){
 echo(&#39;非法数据来源&#39;);
 exit();
}
$sec_name=$_POST[&#39;sec_name&#39;];
//PHP数据处理.....
?>