http://docs.guzzlephp.org/en/stable/index.html
Use following command to install Guzzle with composer composer require guzzlehttp/guzzle
This program will read xml feeds from http://sitepoint.com/feed
To test the program, clone / download this folder to your xampp or upload to hosting.
go to URL : http:///GuzzleClient/xmlfeedreader.php
insite the textbox, add url as http://sitepoint.com/feed
it will fetch the xml feeds from sitepoint.com