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How do I do HTTP basic authentication with Guzzle?

You can easily do HTTP basic authentication with Guzzle by passing in an auth array with the username and password as part of the options while creating the Client object. Guzzle will make sure to use these authentication credentials with all the follow-up requests made by the $client.

Here is some sample code that uses an authentication endpoint at HTTP Bin to demonstrate this:

use GuzzleHttp\Client;

$client = new Client([
    'auth' => ['user', 'passwd']
]);

$response = $client->get('https://httpbin.org/basic-auth/user/passwd');
$body = $response->getBody();
echo $response->getStatusCode() . PHP_EOL;
echo $body;

// Output:
// 200
// {
//   "authenticated": true,
//   "user": "user"
// }

Alternatively, you can specify the auth credentials on a per-request basis as well:

$client = new GuzzleHttp\Client();
$response = $client->get('https://httpbin.org/basic-auth/user/passwd', [
    'auth' => [
        'user', 
        'passwd'
    ]
]);
$body = $response->getBody();
echo $response->getStatusCode() . PHP_EOL;
echo $body;

// Output:
// 200
// {
//   "authenticated": true,
//   "user": "user"
// }

Note: If you decide to use the latter method, you can tell Guzzle to persist cookies and use them for future requests by passing the 'cookies' => true option while creating the Client object.

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