微信url认证

 valid();

class wechatCallbackapiTest
{
	public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
        	echo $echoStr;
        	exit;
        }
    }

    // public function responseMsg()
    // {
		// //get post data, May be due to the different environments
		// $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

      	// //extract post data
		// if (!empty($postStr)){
                
              	// $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                // $fromUsername = $postObj->FromUserName;
                // $toUsername = $postObj->ToUserName;
                // $keyword = trim($postObj->Content);
                // $time = time();
                // $textTpl = "
 
  
							// 
  
   %s
  
							// 
  
   %s
  
							// 
  
   %s
  
							// 
  
   %s
  
							// 
  
   %s
  
							// 
  
   0
  
							// 
 ";             
				// if(!empty( $keyword ))
                // {
              		// $msgType = "text";
                	// $contentStr = "Welcome to wechat world!";
                	// $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                	// echo $resultStr;
                // }else{
                	// echo "Input something...";
                // }

        // }else {
        	// echo "";
        	// exit;
        // }
    // }
		
	private function checkSignature()
	{
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];	
        		
		$token = TOKEN;
		$tmpArr = array($token, $timestamp, $nonce);
		sort($tmpArr);
		$tmpStr = implode( $tmpArr );
		$tmpStr = sha1( $tmpStr );
		
		if( $tmpStr == $signature ){
			return true;
		}else{
			return false;
		}
	}
}

?>