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);//发送人                    $fromUsername = $postObj->FromUserName;//接收人                    $toUsername = $postObj->ToUserName;                    $keyword = trim($postObj->Content);                    $msgType = $postObj->MsgType;                    if($msgType == ‘text‘) {//接收类型为文本                      echo sprintf(wechatCallbackapi::$textTpl, $fromUsername, $toUsername, time(), "text", "返回文本");//echo sprintf(wechatCallbackapi::$imageTpl, $fromUsername, $toUsername, time(), "返回文本", $event["t"], "图片地址", "图片链接地址");	        		    } else if($msgType == ‘event‘){//接收类型为事件		         $msgEvent = $postObj->Event;		         if ($msgEvent == ‘CLICK‘){              	             $eventKey = $postObj->EventKey;		             echo sprintf(wechatCallbackapi::$textTpl, $fromUsername, $toUsername, time(), "text", "返回文本");  		        }		    }			                   }else {        	  echo "";        	  exit;        	}    	}