private function parseOption() {
		$value = 0;
		$options = explode('|', $this->option);
	
		foreach($options as $option) {
			if (!empty($option)) {
				$constant = "LOG_" . trim($option);
				if (defined($constant)) {
					$value |= constant($constant);
				} else {
					trigger_error("log4php: Invalid syslog option provided: $option. Whole option string: {$this->option}.", E_USER_WARNING);
				}
			}
		}
		return $value;
	}