Michael Dowling has announced the release of Guzzle 4.0.0 on his site today. Guzzle is one of the most widely used, popular HTTP clients in the PHP community today. Its used in both corporate and open source projects as a primary means for making HTTP requests and RESTful web service clients.

Guzzle 4.0 has arrived! The new version of Guzzle is now simpler, faster, more flexible, and more powerful than ever. [...] Guzzle is a PHP HTTP client that makes it easy to work with HTTP/1.1 and takes the pain out of consuming web services.

He includes a quick example of it in use making a request to the GitHub API to fetch user information. He lists out some of the changes made in this release but points to this other post for the full list. He's also tagged other related projects to match this 4.0.0 release including Guzzle Streams and the Log Subscriber.