How do I do HTTP basic authentication using Guzzle?

Question

I want to do basic access authentication using Guzzle and I am very new to programming. I have no clue what to do. I tried to do this using curl but my environment requires

Answer 1

According to what @bourgeois247 said about base64 encoding, the following worked perfectly for me on Guzzle 6:

$client = new Client();
$credentials = base64_encode('username:password');
$response = $client->post('url',
        [
            'headers' => [
                'Authorization' => 'Basic ' . $credentials,
            ],
        ]);