/*微信图片敏感内容检测*/
    public function imgSecCheck(){
        $img = "https://jiafengfarming.cn/public/farm/6631d2e553e85.png";
        $file['media'] = file_get_contents($img);
        $token = $this->getAccessToken();
        $url = "https://api.weixin.qq.com/wxa/img_sec_check?access_token=$token";
        $info = $this->http_request($url,$file);
        return $this->json_return(json_decode($info),true);
    }