PHP WeChat開発テキスト自動返信

<xml> <ToUserName>< ![CDATA[toUser] ]></ToUserName> <FromUserName>< ![CDATA[fromUser] ]></FromUserName> <CreateTime>12345678</CreateTime> <MsgType>< ![CDATA[text] ]></MsgType> <Content>< ![CDATA[你好] ]></Content> </xml>

public function replyText(){
        if(IS_GET){
            $this->display('replytext');
        }else{
            $mp = $this->mp;
            $mp_id = $mp['id'];
            $data = I('post.');

            $textret = M('reply_text')->add($data);

            if($textret){
                $data['reply_id'] = $textret;
                $data['mp_id'] = $mp_id;
                $data['type'] = 'text';
                if ($mp['is_use'] == 1){
                    $data['status'] = 1;
                }else{
                    $data['status'] = 0;
                }
                $ret = M('rule')->add($data);
                if ($ret) {
                    $this->ajaxReturn(array('msg'=>'添加成功！'));
                }else{
                    $this->ajaxReturn(array('msg'=>$ret));
                }
            }
        }
    }

//获取哪个公众号发过来的请求
        $mp_id = $_GET['id'];

        $content = $request['content'];
        $where['mp_id'] = $mp_id;
        $where['keyword'] = $content;
        $data = M('rule')->where($where)->find();
        if ($data) {
            //发送消息中有这个关键字
            $reply_id = $data['reply_id'];
            $type = $data['type'];

            if ($type == "text") {
                $reply = M('reply_text')->find($reply_id);
                $reply_text = $reply['content'];
                return ResponsePassive::text($request['fromusername'], $request['tousername'], $reply_text);
            }
            
        }else{
            return 'success';
        }