function autoDetect($file, $params = false)
    {
        // Sanity checks
        if (!file_exists($file)) {
            return PEAR::raiseError("File \"$file\" doesn't exist");
        }

        if (!is_readable($file)) {
            return PEAR::raiseError("File \"$file\" is not readable");
        }

        if (function_exists('finfo_file')) {
            $finfo = finfo_open(FILEINFO_MIME);
            $type  = finfo_file($finfo, $file);
            finfo_close($finfo);
            if ($type !== false && $type !== '') {
                return MIME_Type::_handleDetection($type, $params);
            }
        }

        if (function_exists('mime_content_type')) {
            $type = mime_content_type($file);
            if ($type !== false && $type !== '') {
                return MIME_Type::_handleDetection($type, $params);
            }
        }

        @include_once 'System/Command.php';
        if (class_exists('System_Command')) {
            return MIME_Type::_handleDetection(
                MIME_Type::_fileAutoDetect($file),
                $params
            );
        }

        require_once 'MIME/Type/Extension.php';
        $mte = new MIME_Type_Extension();
        return $mte->getMIMEType($file);
    }