Latrell\Alipay\Web\SdkPayment::getHttpResponseGET PHP Method

    private function getHttpResponseGET($url, $cacert_url)
    {
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_HEADER, 0);
        // 过滤HTTP头
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        // 显示输出结果
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
        //SSL证书认证
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
        //严格认证
        curl_setopt($curl, CURLOPT_CAINFO, $cacert_url);
        //证书地址
        $responseText = curl_exec($curl);
        //var_dump( curl_error($curl) );//如果执行curl过程中出现异常，可打开此开关，以便查看异常内容
        curl_close($curl);
        return $responseText;
    }