[YiiFramework]使用YiiFramework开发微信公众平台

/**
 * WeixinCallback 
 * 
 * @package 
 * @version $id$
 * @copyright 1997-2005 The PHP Group
 * @author davidhhuan@126.com
 * {@link http://www.sharefamily.net}
 */
class Weixin
{
	//$_GET参数
	public $signature;
	public $timestamp;
	public $nonce;
	public $echostr;
	//
	public $token;
	public $debug = false;
	public $msg = array();
	public $setFlag = false;

	/**
	 * __construct 
	 * 
	 * @param mixed $params 
	 * @access public
	 * @return void
	 */
	public function __construct($params)
	{
		foreach ($params as $k1 => $v1)
		{
			if (property_exists($this, $k1))
			{
				$this->$k1 = $v1;
			}
		}
	}
	
	/**
	 * valid 
	 * 
	 * @access public
	 * @return void
	 */
	public function valid()
    {
        //valid signature , option
        if($this->checkSignature()){
        	echo $this->echostr;
			Yii::app()->end();
        }
	}

	/**
	 * 获得用户发过来的消息（消息内容和消息类型  ） 
	 * 
	 * @access public
	 * @return void
	 */
	public function init()
	{
		$postStr = empty($GLOBALS["HTTP_RAW_POST_DATA"]) ? '' : $GLOBALS["HTTP_RAW_POST_DATA"];
		if ($this->debug) 
		{
        	$this->log($postStr);
        }
        if (!empty($postStr)) {
            $this->msg = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
        }
	}

	/**
	 * makeEvent 
	 * 
	 * @access public
	 * @return void
	 */
	public function makeEvent()
	{
		
	}

    /**
     * 回复文本消息 
     * 
     * @param string $text 
     * @access public
     * @return void
     */
    public function makeText($text='')
    {
        $createTime = time();
        $funcFlag = $this->setFlag ? 1 : 0;
        $textTpl = "
            msg->FromUserName}]]>
            msg->ToUserName}]]>
            {$createTime}
            
            
            %s
            ";
        return sprintf($textTpl,$text,$funcFlag);
	}
	
	/**
     * 根据数组参数回复图文消息 
     * 
     * @param array $newsData 
     * @access public
     * @return void
     */
    public function makeNews($newsData=array())
    {
        $createTime = time();
        $funcFlag = $this->setFlag ? 1 : 0;
        $newTplHeader = "
            msg->FromUserName}]]>
            msg->ToUserName}]]>
            {$createTime}
            
            %s";
        $newTplItem = "
            
            
            
            
            ";
        $newTplFoot = "
            %s
            ";
        $cOntent= '';
		$itemsCount = count($newsData['items']);
		//微信公众平台图文回复的消息一次最多10条
        $itemsCount = $itemsCount <10 ? $itemsCount : 10;
        if ($itemsCount) {
            foreach ($newsData['items'] as $key => $item) {
				if ($key<=9) {
                    $content .= sprintf($newTplItem,$item['title'],$item['description'],$item['picurl'],$item['url']);
                }
            }
        }
        $header = sprintf($newTplHeader,$itemsCount);
        $footer = sprintf($newTplFoot,$funcFlag);
        return $header . $content . $footer;
	}

    /**
     * reply 
     * 
     * @param mixed $data 
     * @access public
     * @return void
     */
    public function reply($data)
    {
		if ($this->debug) 
		{
        	$this->log($data);
        }
        echo $data;
    }

	/**
	 * checkSignature 
	 * 
	 * @access private
	 * @return void
	 */
	private function checkSignature()
	{
		$tmpArr = array($this->token, $this->timestamp, $this->nonce);
		sort($tmpArr);
		$tmpStr = implode( $tmpArr );
		$tmpStr = sha1( $tmpStr );
		
		if( $tmpStr == $this->signature ){
			return true;
		}else{
			return false;
		}
	}

	/**
	 * log 
	 * 
	 * @access private
	 * @return void
	 */
	private function log($log)
	{
		if ($this->debug)
		{
			file_put_contents(Yii::getPathOfAlias('application').'/runtime/weixin_log.txt', var_export($log, true)."\n\r", FILE_APPEND);
		}
	}
}

/**
	 * actionIndex 
	 * 
	 * @access public
	 * @return void
	 */
	public function actionIndex()
	{
		$weixin = new Weixin($_GET);
		$weixin->token = $this->_weixinToken;
		//$weixin->debug = true;

		//网址接入时使用
		if (isset($_GET['echostr']))
		{
			$weixin->valid();
		}
		
		$weixin->init();
		$reply = '';
		$msgType = empty($weixin->msg->MsgType) ? '' : strtolower($weixin->msg->MsgType);
		switch ($msgType)
		{
		case 'text':
			//你要处理文本消息代码
			break;
		case 'image':
			//你要处理图文消息代码
			break;
		case 'location':
			//你要处理位置消息代码
			break;
		case 'link':
			//你要处理链接消息代码
			break;
		case 'event':
			//你要处理事件消息代码
			break;
		default: 
			//无效消息情况下的处理方式
			break;
		}
		$weixin->reply($reply);
	}