YII第三步，日志开启

defined(‘YII_DEBUG‘) or define(‘YII_DEBUG‘,true);

‘preload‘=>array(‘log‘),
 ‘log‘=>array(
            ‘class‘=>‘CLogRouter‘,
            ‘routes‘=>array(
                array(
                    ‘class‘=>‘CFileLogRoute‘,
                    ‘levels‘=>‘info,error,warning‘,
                    ),
                ),
        ),

public function actionIndex()
{

Yii::trace(‘action‘, ‘site.action‘);
Yii::log("action","info","site.action");

}