Guzzle 4.0

Written by unknown - - Aggregated on Saturday November 15, 2014

Guzzle 4.0 has arrived! The new version of Guzzle is now simpler, faster, more flexible, and more powerful than ever.

You can install Guzzle 4 using Composer:

    "require": {
        "guzzlehttp/guzzle": "4.*"

What’s Guzzle?

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. Here’s a simple example of using Guzzle to interact with the GitHub API:

$client = new GuzzleHttp\Client();
$res = $client->get('', [
    'auth' =>  ['user', 'pass']
echo $res->getStatusCode();           // 200
echo $res->getHeader('content-type'); // 'application/json; charset=utf8'
echo $res->getBody();                 // {"type":"User"...'
var_export($res->json());             // Outputs the JSON decoded data

What’s Changed?

You can find out more about the changes that were made by reading the blog post about the release candidate:

You can view a list of changes and the upgrade guide to help you migrate from Guzzle 3 to 4 here:

The Guzzle 4.0 repository is available at Guzzle 3.x development has moved to Please post issues for Guzzle 3 on the Guzzle 3 specific repository.

Because Guzzle 4.x was basically a rewrite of the library, I’ve updated Guzzle 4 to use a different namespace and a different Composer package name so that you can use Guzzle 3 and 4 in the same project and slowly migrate pieces of you applications over time as needed.

Plugins and companion libraries

In addition to launching Guzzle 4.0, I’ve also tagged a 1.0 release of the following packages:

The following libraries do not yet have a 1.0 release, but are available for use:

Service Descriptions

Guzzle service descriptions (previously found under the Guzzle\Service namespace) have been moved into their own library at This library is mostly complete but needs some additional testing and documentation.


The documentation has been completely rewritten and updated for Guzzle 4.0: The Guzzle 3.0 documentation is still available online at

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