PHP img_sec_check url

    public function img_sec_check($media){
        $media = file_get_contents($media);
        if (empty($media)) {
            return true;
        }
        $farce = 0;//强制更新token
        $retry = 0;
        $num = 0;
        $url = ‘https://api.weixin.qq.com/wxa/img_sec_check?access_token=‘;  
        $boundary="----".md5(date);
        $formdata = "--" . $boundary ."\r\n";
        $formdata .= "Content-Disposition: form-data; name=\"upload\"; filename=\"upload.jpg\"\r\n";
        $formdata .= "Content-type: application/octet-stream\r\n\r\n";
        $formdata .= $media."\r\n";
        $formdata .= "--" . $boundary . "\r\n"."--\r\n\r\n";
        do {
            $token = $this->getToken($farce);
            $curl = curl_init();
            curl_setopt($curl, CURLOPT_URL, $url . $token);
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $formdata);
            curl_setopt($curl, CURLOPT_HTTPHEADER, [
                        "Content-Type: multipart/form-data; boundary=".$boundary,
                        "Content-Length: " . strlen($formdata)
                    ]);
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
            $result = curl_exec($curl);
            curl_close($curl);
            $resultObj = json_decode($result);
            var_dump($url . $token);
            var_dump($resultObj);
            $num++;
            //token过期
            if ($resultObj->errcode == 40001) {
                $farce = 1;
                $retry = 1;
            }else if ($resultObj->errcode == -1) {//服务器返回忙
                $retry = 1;
            } else if($resultObj->errcode == 0){
                $farce = 0;
                $retry = 0;
            }
        } while ($retry && $num < 5);
        if ($resultObj->errcode != 0) {
            return false;
        }
        return true;
    }