企业微信自建应用设置API接收消息，提示“openapi回调地址请求不通过” 测试回调模式不返回明文

直接网页打开请求，正常返回123.

/**

     * 回调函数

     */

    public function callBack(Request $request){

        $encodingAesKey = ""; //回调里面的EncodingAESKey

        $token = ""; //回调里面的token

        $corpId = ""; //企业id

        $sVerifyMsgSig = $request->param('msg_signature');

        $sVerifyTimeStamp = $request->param('timestamp');

        $sVerifyNonce = $request->param('nonce');

        $sVerifyEchoStr = $request->param('echostr');

        $wxcpt = new \WXBizMsgCrypt($token, $encodingAesKey, $corpId);

        $errCode = $wxcpt->VerifyURL($sVerifyMsgSig, $sVerifyTimeStamp, $sVerifyNonce, $sVerifyEchoStr, $sEchoStr);

        if ($errCode == 0) {

            return $sEchoStr;

        } else {

            print("ERR: " . $errCode . "\n\n");

        }

    }