1. Go to this page and download the library: Download downshiftorg/wp-http library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
downshiftorg / wp-http example snippets
use DownShift\WordPress\Http\Request;
$request = new Request();
$response = $request->get('http://api.yolo.com/status');
$response->getStatusCode(); // (int) 200
$response->getBody(); // (string) '{"msg": "You only live once!"}'
$response->json(); // (array) ['msg' => 'You only live once!']