php 常用的幾個curl封裝，包括GET/POST/JSON，HTTPS等

/**
     * 以post方式提交xml到對應的接口url
     * @param     $url
     * @param     $method
     * @param     $data
     * @param int $timeout
     * @return mixed
     */
    public function do_curl($url, $method='get', $postData='',$timeout = 30)
    {
        $curl = curl_init();  //初始化
        /*支持SSL 不驗證CA根驗證*/
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);

        /*重定向跟隨*/
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, false);

        //設置http驗證方法
        curl_setopt($curl,CURLOPT_HTTPAUTH,CURLAUTH_BASIC);
        //超時
        curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);

        //設置curl_exec獲取的信息的返回方式
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);
        $header = [
            "Content-Type:application/json;charset=utf-8;",
            "Connection: keep-alive;",
        ];
        curl_setopt($curl, CURLOPT_HTTPHEADER, $header);


        switch (strtolower($method)) {
            case "post":
                curl_setopt($curl, CURLOPT_URL, $url);
                curl_setopt($curl, CURLOPT_POST, true);
                curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($postData));
                break;
            case "put":
                curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
                curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($postData));
                curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'PUT');
                curl_setopt($curl, CURLOPT_URL, $url);
                break;
            case "delete":
                curl_setopt($curl, CURLOPT_URL, $url . '?' . http_build_query($postData));
                curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
                break;
            case "get":
                curl_setopt($curl, CURLOPT_URL, $url . '?' . http_build_query($postData));
                break;
            case "new_get":
                curl_setopt($curl, CURLOPT_URL, $url . "?para=" . urlencode(json_encode($postData)));
                break;
            default:
                return [
                    'status'=>0,
                    'msg'=>'不支持的HTTP方式'
                ];
                break;
        }
        $result = curl_exec($curl);
        curl_close($curl);
        return json_decode($result,true);
    }

    /**
     * @param $url 請求網址
     * @param bool $params 請求參數
     * @param int $ispost 請求方式
     * @param int $https https協議
     * @return bool|mixed
     */
    public static function curl($url, $params = false, $ispost = 0, $https = 0)
    {
        $httpInfo = array();
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36');
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        if ($https) {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); // 對認證證書來源的檢查
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); // 從證書中檢查SSL加密算法是否存在
        }
        if ($ispost) {
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
            curl_setopt($ch, CURLOPT_URL, $url);
        } else {
            if ($params) {
                if (is_array($params)) {
                    $params = http_build_query($params);
                }
                curl_setopt($ch, CURLOPT_URL, $url . '?' . $params);
            } else {
                curl_setopt($ch, CURLOPT_URL, $url);
            }
        }

        $response = curl_exec($ch);

        if ($response === FALSE) {
            //echo "cURL Error: " . curl_error($ch);
            return false;
        }
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $httpInfo = array_merge($httpInfo, curl_getinfo($ch));
        curl_close($ch);
        return $response;
    }

    /**
     * 以post方式提交xml到對應的接口url
     * @param     $xml
     * @param     $url
     * @param int $second
     * @return mixed
     */
    public function postXmlCurl($url,$xml,$second = 30)
    {
        $ch = curl_init();
        // 設置超時
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);//嚴格校驗
        // 設置header
        curl_setopt($ch, CURLOPT_HEADER, false);
        // 要求結果爲字符串且輸出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        // post提交方式
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        // 運行curl
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }