url_router.php

Features:
* Named routes
* Reverse routing (to get the URL for a named route)
* Multiple patterns
* Guards
* Separate HTTP Verb/Method checking
* Error handling / Halting

Helpers:
* CSRF prevention
* Flash session variables
* Escaping
* Template rendering

<?php

# routing (via any method)
map::edit('/:lang/edit/:page', function($lang, $pagename) {});
map::list_users('/:lang/users', function($lang) {});

# -- or 
map::edit('/:lang/edit/:page');
class Edit {
  function __construct($l,$p) {
    page::exist($p);
    auth();
  }
  function post($lang,$page) {}
}

# -- or
map::edit('/:lang/edit/:page')->guards(['Page::exist','page'], ['auth']);
map::edit('/:lang/edit/:page')->when(function($p){Page::exit($p);});

# multiple routes
map::view('/:lang/view/:page', '/:lang/view/:page~:version');

# middleware
map::before(['edit','delete','view'], function() {

});

# get the route for a page
locate::edit('en', 'My Page'); #-> '/en/edit/my-page'
locate::list_users('en'); #-> '/en/users'

# checking request method
if (verb('get'));
if (verb('post'));

# route an error
map::error(404, function($message = null){});
map::error('database', function($message = null){});

# halt, getting handled by a mapped handled, or the default
halt(404, 'My Page');
halt('database');