Yii adds your own search criteria

public function search()
	{
		// Warning: Please modify the following code to remove attributes that
		// should not be searched.

		$criteria=new CDbCriteria;

		$criteria->compare('usertest_id',$this->usertest_id,true);
		$criteria->compare('usertest_project',$this->usertest_project,true);
		$criteria->compare('usertest_imei',$this->usertest_imei,true);
		//$criteria->compare('usertest_sw',$this->usertest_sw,true);
		
		$whereSql = "usertest_sw like '"; //Y2A5HA80BR20 Y2A5GD80BR10 Y2A5*80BR20 usertest_sw like '%Y2A5%80BR20%'
		$keyword = $this->usertest_sw;
		$keyarr=explode('*',$keyword); 
		for($index = 0; $index < count($keyarr); $index++) { 
			$whereSql .= "%$keyarr[$index]";
		} 
		$whereSql .= "%&#39;";
		$criteria->addCondition($whereSql);
		
		
		$criteria->compare('usertest_package',$this->usertest_package,true);
		$criteria->compare('usertest_type',$this->usertest_type,true);
		$criteria->compare('usertest_logtime',$this->usertest_logtime,true);
		$criteria->compare('usertest_cu',$this->usertest_cu,true);
		$criteria->compare('usertest_localtime',$this->usertest_localtime,true);
		$criteria->compare('usertest_logpath',$this->usertest_logpath,true);
		$criteria->compare('usertest_logkeyinfo',$this->usertest_logkeyinfo,true);
		$criteria->compare('usertest_bugid',$this->usertest_bugid,true);
		$criteria->compare('usertest_bugstatus',$this->usertest_bugstatus,true);
		$criteria->compare('usertest_comments',$this->usertest_comments,true);
		$criteria->compare('usertest_userinfo',$this->usertest_userinfo,true);
		$criteria->compare('usertest_repeatcount',$this->usertest_repeatcount,true);
		
		return new CActiveDataProvider($this, array(
			'criteria'=>$criteria,
			'sort'=>array(
		        'defaultOrder'=>'usertest_logtime desc',
		    ),
		));
	}

The above introduces how to add your own search conditions in Yii, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.