Yii Framework框架中事件和行为的区别及应用实例分析

class Controller extends CController
{
  public function __construct()
  {
    parent::__construct();
    //将请求的 IP 记录到数据库
  }
}

public function run()
{
  if($this->hasEventHandler('onBeginRequest'))
    $this->onBeginRequest(new CEvent($this));
  $this->processRequest();
  if($this->hasEventHandler('onEndRequest'))
    $this->onEndRequest(new CEvent($this));
}

Yii::createWebApplication($config)->run();

$app = Yii::createWebApplication($config);
Yii::app()->onBeginRequest=function($event) {
  //将请求的 IP 记录到数据库
};
Yii::app()->onBeginRequest=function($event) {
  //其它的你想要处理的内容，比如说，生成一个文件
  //file_put_contents('onBeginRequest.txt', '阿妈，我得左啦！');
};
$app->run();

/***************************************************
在我们想要的内容的前后出现了这些代码
只是为了说明，我们添加的内容是要放在
这个配置数据的一维里面。
'import'=>array(
  'application.models.*',
  'application.components.*',
  'application.helpers.*',
),
'defaultController'=>'post',
***************************************************/

//其它代码
'import'=>array(
  'application.models.*',
  'application.components.*',
  'application.helpers.*',
),

/************** 这才是我们想要添加的代码 **************/
'onBeginRequest' => array('MyEventHandler', 'MyEventHandlerMethod'),

'defaultController'=>'post',
//其它代码

/**
 * 自己定义发送邮件事件
 * @param unknown_type $event
 */
public function onSendMail($event)
{
  $this->raiseEvent('onSendMail',$event);
}

/**
 * 验证成功，执行
 * @see CModel::afterValidate()
 */
public function afterValidate() 
{
  if($this->hasEventHandler('onSendMail'))
    $this->onSendMail(new CEvent($this));
}

public function actionContact()
{
  $model=new ContactForm;

  $model->onSendMail=function($event) {
    $headers="From: {$event->sender->email}\r\nReply-To: {$event->sender->email}";
    mail(Yii::app()->params['adminEmail'],$event->sender->subject,$event->sender->body,$headers);
  };

  if(isset($_POST['ContactForm']))
  {
    $model->attributes=$_POST['ContactForm'];
    if($model->validate())
    {

      Yii::app()->user->setFlash('contact','Thank you for contacting us. We will respond to you as soon as possible.');
      $this->refresh();
    }
  }
  $this->render('contact',array('model'=>$model));
}

<?php
class ApplicationBehavior extends CBehavior 
{

  public function events()
  {
    return array_merge(parent::events(),array(
        'onBeginRequest'=>'beginRequest'
    ));
  }

  public function beginRequest($event) 
  {
    echo "我已经将 onBeginRequest 的事件处理通过行为绑定了";
  }
}

$app = Yii::createWebApplication($config);
Yii::app()->onBeginRequest=function($event) {
  //将请求的 IP 记录到数据库
};
Yii::app()->onBeginRequest=function($event) {
  //file_put_contents('onBeginRequest.txt', '阿妈，我又得左啦！');
};
/****** 这句才是我们想要的东东 *********/
$app->attachBehavior('app', 'application.behaviors.ApplicationBehavior');
$app->run();

'behaviors' => array(
  'app' => 'application.behaviors.ApplicationBehavior',
),