Rails Like PHP URL Router

.htaccess

RewriteEngine On
# RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [QSA,L]

index.php

<?php

require_once 'route.php';

Route::map("/user/:id/:name",
    function($id, $name) {
        echo $id . ' - ' . $name;
    }
);

route.php

<?php

// Reference: http://blog.sosedoff.com/2009/09/20/rails-like-php-url-router/

class Route
{
    public static function requestUri()
    {
        $uri = '';
        if (empty($_SERVER['PATH_INFO']) === false) {
            $uri = $_SERVER['PATH_INFO'];
        } else {
            if (isset($_SERVER['REQUEST_URI']) === true) {
                $scheme = empty($_SERVER['HTTPS']) === true || $_SERVER['HTTPS'] === 'off' ? 'http' : 'https';
                $uri = parse_url($scheme . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], PHP_URL_PATH);
            } elseif (isset($_SERVER['PHP_SELF']) === true) {
                $uri = $_SERVER['PHP_SELF'];
            } else {
                return "";
            }

            $request_uri = isset($_SERVER['REQUEST_URI']) === true ? $_SERVER['REQUEST_URI'] : $_SERVER['PHP_SELF'];
            $script_name = $_SERVER['SCRIPT_NAME'];

            $base_uri = strpos($request_uri, $script_name) === 0 ? $script_name : str_replace('\\', '/', dirname($script_name));
            $base_uri = rtrim($base_uri, '/');

            if ($base_uri !== '' && strpos($uri, $base_uri) === 0) {
                $uri = substr($uri, strlen($base_uri));
            }

            return '/' . ltrim($uri, '/');
        }
    }

    public static function map($pattern_uri, $callback = null)
    {
        $request_uri = self::requestUri();

        // Get names: :id, :name
        preg_match_all('/:([\w]+)/', $pattern_uri, $names, PREG_PATTERN_ORDER);
        $names = $names[0];

        // Form: /user/:id/:name
        // To  : /user/([A-Za-z0-9_]+)/([A-Za-z0-9_]+)/?
        $pattern_uri_regex  = preg_replace_callback('/:[\w]+/', array(__CLASS__, 'patternUriRegex'), $pattern_uri);
        $pattern_uri_regex .= '/?';

        // Match pattern uri regex on request uri, fill params
        $params = array();
        if (preg_match('@^' . $pattern_uri_regex . '$@', $request_uri, $values)) {
            array_shift($values);

            foreach($names as $index => $value) {
                $params[substr($value, 1)] = urldecode($values[$index]);
            }

            if (is_callable($callback) === true) {
                call_user_func_array($callback, array_values($params));
            }
        }

        return $params;
    }

    public static function patternUriRegex($matches)
    {
        return '([a-zA-Z0-9_\+\-%]+)';
    }
}