How can I track redirected requests?

You can enable tracking of redirected URIs and status codes via the track_redirects option. Each redirected URI and status code will be stored in the X-Guzzle-Redirect-History and the X-Guzzle-Redirect-Status-History header respectively.

The initial request’s URI and the final status code will be excluded from the results. With this in mind you should be able to easily track a request’s full redirect path.

For example, let’s say you need to track redirects and provide both results together in a single report:

// First you configure Guzzle with redirect tracking and make a request
$client = new Client([
    RequestOptions::ALLOW_REDIRECTS => [
        'max'             => 10,        // allow at most 10 redirects.
        'strict'          => true,      // use "strict" RFC compliant redirects.
        'referer'         => true,      // add a Referer header
        'track_redirects' => true,
    ],
]);
$initialRequest = '/redirect/3'; // Store the request URI for later use
$response = $client->request('GET', $initialRequest); // Make your request
// Retrieve both Redirect History headers
$redirectUriHistory = $response->getHeader('X-Guzzle-Redirect-History')[0]; // retrieve Redirect URI history
$redirectCodeHistory = $response->getHeader('X-Guzzle-Redirect-Status-History')[0]; // retrieve Redirect HTTP Status history
// Add the initial URI requested to the (beginning of) URI history
array_unshift($redirectUriHistory, $initialRequest);
// Add the final HTTP status code to the end of HTTP response history
array_push($redirectCodeHistory, $response->getStatusCode());
// (Optional) Combine the items of each array into a single result set
$fullRedirectReport = [];
foreach ($redirectUriHistory as $key => $value) {
    $fullRedirectReport[$key] = ['location' => $value, 'code' => $redirectCodeHistory[$key]];
}
echo json_encode($fullRedirectReport);