private function prepend($log_level) 
	{
		$time = date('Y-m-d G:i:s');

		switch ($log_level) {
			
			case self::FATAL:
				return $time . ' - FATAL - ';
				break;

			case self::ERROR:
				return $time . ' - ERROR - ';
				break;

			case self::WARN:
				return $time . ' - WARN  - ';
				break;

			case self::INFO:
				return $time . ' - INFO  - ';
				break;

			case self::DEBUG:
				return $time . ' - DEBUG - ';
				break;

			case self::QUERY:
				return $time . ' - QUERY - ';
				break;

			default:
				return $time . ' - LOG   - ';
		} 
	}