myMyPlex/users/sign_in.xml

<?php
require_once '../myMyPlex.inc';

# Bail if we're not happy with the auth provied by the HTTP server
$username = '';
if (array_key_exists('PHP_AUTH_USER', $_SERVER) && strlen($_SERVER['PHP_AUTH_USER'])) {
	$username = preg_replace('/\W/', '', $_SERVER['PHP_AUTH_USER']);
}
if ($username == '' || $username != $_SERVER['PHP_AUTH_USER']) {
	header('HTTP/1.1 401 Authorization Required');
	die("Invalid username/password\n");
}

# Lookup or generate an auth token
$user = get_user($username);
if (! $user['auth']) {
	$user['username'] = $username;
	$user['auth'] = generate_auth();
	save_user($user);
}

# Build an XML document
$doc = new DomDocument('1.0');
$root = $doc->createElement('user');
$root = $doc->appendChild($root);
	
$elm = $doc->createElement('joined-at', date('c'));
$elm->setAttribute('type', 'datetime');
$elm = $root->appendChild($elm);

$elm = $doc->createElement('username', $username);
$elm = $root->appendChild($elm);

$elm = $doc->createElement('email', $username . '@localhost');
$elm = $root->appendChild($elm);

$elm = $doc->createElement('authentication-token', $user['auth']);
$elm = $root->appendChild($elm);

# Send our XML to the PMS
header('HTTP/1.1 201 Created');
print $doc->saveXML();

?>