PHP Util class to call external REST web API

CurlClass.php

<?php
class CurlClass {
    private $url;
    private $method;
    private $data;
    private $curlGlobal;
    function __construct($url, $method, $data) {
        $this->url = $url;
        $this->method = $method;
        $this->data = $data;
    }
    function apiCallReturn() {
        $curl = curl_init();
        $this->curlGlobal = $curl;
        switch ($this->method) {
            case "POST":
                curl_setopt($curl, CURLOPT_POST, 1);
                if ($this->data) {
                    curl_setopt($curl, CURLOPT_POSTFIELDS, $this->data);
                }
                break;
            case "GET":
                curl_setopt($curl, CURLOPT_GET);
                break;
            default:
                if ($this->data) {
                    $url = sprintf("%s?%s", $url, http_build_query($this->data));
                }
        }
        // Optional Authentication:
        //curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
        //curl_setopt($curl, CURLOPT_USERPWD, "username:password");
        curl_setopt($curl, CURLOPT_URL, $this->url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $result = curl_exec($curl);
        return $result;
    }
    function connClose() {
        curl_close($this->curlGlobal);
    }
}