日志类

由于其方法均放在了 Kohana 类 类中，以下就不再进行翻译。

The configuration file Log.php can be found in the application/config directory. If it's not there it can be copied from the system/config directory. See for more information on the 配置类（Config Class） page.

There are three settings for the Log class:

$config['threshold'] = 0;
 
$config['directory'] = 'logs';
 
$config['format'] = 'Y-m-d H:i:s';

$config['threshold'] can be set at four levels:

• 0 - Logging is disabled
• 1 - Error messages including PHP errors
• 2 - Debug messages
• 3 - Informational messages

When set to 3 it will also log 2 and 1. Same goes for 2.

Level 1 is recommended in production use as it will only log errors. Level 2 is useful while debugging, it will log all libraries loaded and any errors. Nothing is logged to level 3 by Kohana by default, but can be used for custom logging by applications.

Important setting the level to 2 or 3 can slow down your application significantly.

$config['directory'] log file directory, relative to application/, or absolute.

$config['format'] format for the timestamps according to date()

Log::add($type, $message) logs the message according to the type given (error,debug,info), the item will be preceded by a timestamp formatted according to $config['format'].

Log::add('error', 'Query went wrong'); // returns void
Log::add('debug', 'Custom library X loaded'); // returns void

Log::write() is called by default on the shutdown event (event.shutdown). See for more information on events the 事件类（Event Class） page. There is typically no need to call it manually.

Log::write(); // returns void