/**
* Get the singleton instance of this class and enable writing at shutdown.
*
* @return Kohana_Log
*/
public static function instance()
{
if (self::$_instance === NULL) {
// Create a new instance
self::$_instance = new self();
// Write the logs at shutdown
register_shutdown_function(array(self::$_instance, 'write'));
}
return self::$_instance;
}