laravel curl post json

<?php
namespace AppBO;

use IlluminateSupportFacadesDB;
use IlluminateSupportFacadesLog;
use CurlCurl;

class Http
{
    public function __construct()
    {
    }

    public function post($url, $params) {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));

        $post_result = curl_exec($ch);
        curl_close($ch);
        return $post_result;
    }

    public function postJson($url, $data_string) {
        $ch = curl_init();
        //$data_string = http_build_query($arr);
        //curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt ( $ch, CURLOPT_URL, $url );
        curl_setopt ( $ch, CURLOPT_POST, 1 );
        curl_setopt($ch, CURLOPT_HEADER, 0);
        //curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        //curl_setopt($curl, CURLOPT_TIMEOUT, 60000);
        //curl_setopt($curl, CURLOPT_VERBOSE, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // https请求 不验证证书和hosts
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        //curl_setopt($curl, CURLOPT_PROXY, "127.0.0.1");
        //curl_setopt($curl, CURLOPT_PROXYPORT, 8999);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            'Content-Type: application/json',
            'Content-Length: ' . strlen($data_string)
        ));

        $post_result = curl_exec($ch);        
        if (curl_errno($ch)) {
            //print curl_error($ch);
        }
        curl_close($ch);
        return $post_result;
    }

    public function get($url) {
        try {
            if (!isset($url))
                return -1;

            $curl = curl_init();
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
            curl_setopt($curl, CURLOPT_URL, $url);
            curl_setopt($curl, CURLOPT_HEADER, 1);
 
            //curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($param));
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            //curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));

            Log::info('url:'.$url);
            $result = curl_exec($curl);
            curl_close($curl);
            //print_r($result);

            return $result;
        }
        catch (Exception $ex) {
            Log::info($ex);
            return -1;
        }
    }
}