php用curl发送get/post请求

    public function curl_request($url,$data = null)
    {
        $headerArray =array("Content-type:application/json;charset='utf-8'","Accept:application/json");
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 30);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curl,CURLOPT_HTTPHEADER,$headerArray);
        if (!empty($data)) {
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        $output = curl_exec($curl);
        curl_close($curl);

        $res = json_decode($output,true);

        return $res;
    }