BasicAuth.php

<?php
 
namespace Http\Message\Authentication;
 
use Http\Message\Authentication;
use Psr\Http\Message\RequestInterface;
 
final class BasicAuth implements Authentication
{
    private $username;
 
    private $password;
 
    public function __construct($username, $password)
    {
        $this->username = $username;
        $this->password = $password;
    }
 
    public function authenticate(RequestInterface $request)
    {
        $header = sprintf('Basic %s', base64_encode(sprintf('%s:%s', $this->username, $this->password)));
 
        return $request->withHeader('Authorization', $header);
    }
}