[jahaa]

Detta bör fungera

<?php
$auth = sprintf('Authorization: Basic %s', base64_encode('username:password') );

$opts = array(
  'http'=>array(
  'method'=>'GET',
  'header'=> $auth)
);

$context = stream_context_create($opts);

fopen('http://host/directory/file.ext','r', false, $context);
?>