日志功能--yii::trace()和yii::log()

'db'=>array(
            ... ...
            /*
             * 下面是调试信息，显示执行的数据库操作
             */
            'enableProfiling'=>YII_DEBUG,
            'enableParamLogging'=>YII_DEBUG,
        ),

        ... ...

        'log'=>array(
            'class'=>'CLogRouter',
            'routes'=>array(
                array(
                    'class'=>'CFileLogRoute',
                    'levels'=>'trace, info',
                    'categories'=>'system.*',
                ),
                array(
                    'class'=>'CEmailLogRoute',
                    'levels'=>'error, warning',
                    'emails'=>'admin@example.com',
                ),
            ),
        ),

<?php

// remove the following lines when in production mode
defined('YII_DEBUG') or define('YII_DEBUG',true);
// specify how many levels of call stack should be shown in each log message
defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',9);//3

Yii::log($message, $level, $category);
Yii::trace($message, $category); 

日志功能--yii::trace()和yii::log()

原文：http://blog.csdn.net/liuruiqun/article/details/45600867