src/log4php/LoggerAppender.php
protected function warn($message) {
		$id = get_class($this) . (empty($this->name) ? '' : ":{$this->name}");
		trigger_error("log4php: [$id]: $message", E_USER_WARNING);
	}
protected function warn($message) {
		$id = get_class($this) . (empty($this->name) ? '' : ":{$this->name}");
		trigger_error("log4php: [$id]: $message", E_USER_WARNING);
	}
Triggers a warning for this logger with the given message.