protected function _errorhandler_file($errstr, $backtrace, $errortype) {
		$body  = '############################## '.$errortype."\n";
		$body .= 'Datum:      '.date("d.m.Y - H:i:s")."\n";
		
		if (isset($_SERVER['REQUEST_URI'])) {
			$body .= 'URL:        '.$_SERVER['REQUEST_URI']."\n";
			$body .= 'IP:         '.$_SERVER['REMOTE_ADDR']."\n";
			$body .= 'User-Agent: '.(isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '-') ."\n";
		} else {
			$body .= 'CLI:        '.(implode(' ', $_SERVER['argv']))."\n";
		}

		$body .= 'Meldung:    '.$errstr."\n";
		$body .= 'Backtrace:  '."\n\n";

		foreach ($backtrace as $value) {
			$body .= '       File: '.$value['file']." (Line ".$value['line'].")\n";
			$body .= '   Function: '.$value['class'].$value['type'].$value['function'].'()'."\n\n";
		}
		$body .= "\n";

		file_put_contents($this->_logfile, $body, FILE_APPEND);
	}