PHP Curl HttpRPC

    /*  
     * @brief 执行URI
     * @param $uri
     * @return json
     * @author fox
     **/
    private function _getHttpResponseGET($uri){
        $curl = curl_init($uri);//initiate
        curl_setopt($curl, CURLOPT_URL, $uri);
        curl_setopt($curl,CURLOPT_HEADER,0);//filter http header
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);//show the output
        curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,true);//ssl certficate|authentication
        curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,2); //strict authentication
        $content = curl_exec($curl);//execute and obtain the content
        curl_close($curl);
        return $content;
 }