Example router

gistfile1.php

<?php 

// Rules:

$this->root()->to('Test#index');

$this->match('archive/:year/:month', array('year' => '\d{4}', 'month' => '1[0-2]|0[1-9]'))
	->to('Blog#archive')->name('blog_archive');

// Mount a callback (only string-callbacks are allowed, so no objects or closures yet)
$this->match('testing')->to('Sample\\SimpleApp::run')->name('simpleapp');

// Redirect to other site, temporary
$this->match('about')->to($this->redirect('http\://www.google.com', 302));

$this->match('search/:query')->to($this->redirect('http\://www.google.com/search?q=:query'));

$this->match('test')->to('test#lol');

$r = $this->resources('test');

// Mount a subapplication, the string parameter is a class inheriting from \Inject\Application\Engine
$this->match('admin*uri')->to('Admin\\Engine');

// Default Route:
$this->match(':controller(/:action(/:id))(.:format)')->name('standard');




// Result:

$router 	= function($env) use($engine, $controllers)
{
	$matches = array();

	if($env['PATH_INFO'] == '/')
	{
		$env['web.route_params'] = $merged = array (
		  'action' => 'index',
		);
		
		$ret = \Sample\Controller\Test::stack($engine, 'index')->run($env);
		
		if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
		{
			return $ret;
		}
	}
	
	if(stripos($env['PATH_INFO'], '/archive/') === 0)
	{
		if(preg_match('#^/archive/(?<year>\\d{4})/(?<month>1[0-2]|0[1-9])$#ui', $env['PATH_INFO'], $match))
		{
			$matches[] = $match;
			$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
			  'action' => 'index',
			), array_reduce($matches, 'array_merge', array())), array (
			  'year' => 0,
			  'month' => 1,
			));
			
			$ret = \Sample\Controller\Blog::stack($engine, 'archive')->run($env);
			
			if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
			{
				return $ret;
			}
			array_pop($matches);
		}
	}
	
	if(strtolower($env['PATH_INFO']) == '/testing')
	{
		$env['web.route_params'] = $merged = array (
		);
		
		$ret = call_user_func('Sample\\SimpleApp::run', $env);
		
		if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
		{
			return $ret;
		}
	}
	
	if(strtolower($env['PATH_INFO']) == '/about')
	{
		$env['web.route_params'] = $merged = array (
		);
		
		return array(302, array('Location' => 'http://www.google.com'), '');
	}
	
	if(stripos($env['PATH_INFO'], '/search/') === 0)
	{
		if(preg_match('#^/search/(?<query>\\w+)$#ui', $env['PATH_INFO'], $match))
		{
			$matches[] = $match;
			$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
			), array_reduce($matches, 'array_merge', array())), array (
			  'query' => 0,
			));
			
			return array(301, array('Location' => 'http://www.google.com/search?q='.$merged['query']), '');
			array_pop($matches);
		}
	}
	
	if(strtolower($env['PATH_INFO']) == '/test')
	{
		if(isset($env['REQUEST_METHOD']) && $env['REQUEST_METHOD'] === 'GET')
		{
			$env['web.route_params'] = $merged = array (
			  'action' => 'index',
			);
			
			$ret = \Sample\Controller\Test::stack($engine, 'index')->run($env);
			
			if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
			{
				return $ret;
			}
		}
		
		if(isset($env['REQUEST_METHOD']) && $env['REQUEST_METHOD'] === 'POST')
		{
			$env['web.route_params'] = $merged = array (
			  'action' => 'index',
			);
			
			$ret = \Sample\Controller\Test::stack($engine, 'create')->run($env);
			
			if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
			{
				return $ret;
			}
		}
		
		$env['web.route_params'] = $merged = array (
		  'action' => 'index',
		);
		
		$ret = \Sample\Controller\Test::stack($engine, 'lol')->run($env);
		
		if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
		{
			return $ret;
		}
	}
	
	if(strtolower($env['PATH_INFO']) == '/test/new')
	{
		$env['web.route_params'] = $merged = array (
		  'action' => 'index',
		);
		
		$ret = \Sample\Controller\Test::stack($engine, 'newform')->run($env);
		
		if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
		{
			return $ret;
		}
	}
	
	if(stripos($env['PATH_INFO'], '/test/') === 0)
	{
		if(preg_match('#^/test/(?<test_id>\\w+)$#ui', $env['PATH_INFO'], $match))
		{
			$matches[] = $match;
			if(isset($env['REQUEST_METHOD']) && $env['REQUEST_METHOD'] === 'GET')
			{
				$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
				  'action' => 'index',
				), array_reduce($matches, 'array_merge', array())), array (
				  'test_id' => 0,
				));
				
				$ret = \Sample\Controller\Test::stack($engine, 'show')->run($env);
				
				if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
				{
					return $ret;
				}
			}
			
			if(isset($env['REQUEST_METHOD']) && $env['REQUEST_METHOD'] === 'PUT')
			{
				$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
				  'action' => 'index',
				), array_reduce($matches, 'array_merge', array())), array (
				  'test_id' => 0,
				));
				
				$ret = \Sample\Controller\Test::stack($engine, 'update')->run($env);
				
				if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
				{
					return $ret;
				}
			}
			
			if(isset($env['REQUEST_METHOD']) && $env['REQUEST_METHOD'] === 'DELETE')
			{
				$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
				  'action' => 'index',
				), array_reduce($matches, 'array_merge', array())), array (
				  'test_id' => 0,
				));
				
				$ret = \Sample\Controller\Test::stack($engine, 'destroy')->run($env);
				
				if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
				{
					return $ret;
				}
			}
			array_pop($matches);
		}
		
		if(preg_match('#^/test/(?<test_id>\\w+)/edit$#ui', $env['PATH_INFO'], $match))
		{
			$matches[] = $match;
			$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
			  'action' => 'index',
			), array_reduce($matches, 'array_merge', array())), array (
			  'test_id' => 0,
			));
			
			$ret = \Sample\Controller\Test::stack($engine, 'edit')->run($env);
			
			if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
			{
				return $ret;
			}
			array_pop($matches);
		}
	}
	
	if(stripos($env['PATH_INFO'], '/admin') === 0)
	{
		if(preg_match('#^/admin(?<uri>.*?)$#ui', $env['PATH_INFO'], $match))
		{
			$matches[] = $match;
			$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
			), array_reduce($matches, 'array_merge', array())), array (
			  'uri' => 0,
			));
			
			$uri  = $merged['uri'];
			$path = empty($uri) ? $env['PATH_INFO'] : substr($env['PATH_INFO'], - strlen($uri));
			
			// Move one step deeper in the directory structure
			$env['SCRIPT_NAME']   = $env['SCRIPT_NAME'].$path;
			$env['BASE_URI']      = $env['BASE_URI'].$path;
			$env['PATH_INFO']     = '/'.trim($uri, '/');
			$env['web.old_route_params'] = $env['web.route_params'];
			
			$engine = new Admin\Engine();
			$ret = $engine->stack()->run($env);
			
			if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
			{
				return $ret;
			}
			array_pop($matches);
		}
	}
	
	if(preg_match('#^/(?<controller>blog|test)(?:/(?<action>\\w+)(?:/(?<id>\\w+))?)?(?:\\.(?<format>\\w+))?$#ui', $env['PATH_INFO'], $match))
	{
		$matches[] = $match;
		$env['web.route_params'] = $merged = array_intersect_key(array_merge(array (
		  'action' => 'index',
		), array_reduce($matches, 'array_merge', array())), array (
		  'controller' => 0,
		  'action' => 1,
		  'id' => 2,
		  'format' => 3,
		));
		
		// No need to check if the index exists, the regex only matches available controllers
		$class_name = $controllers[strtolower($merged['controller'])];
		$ret = $class_name::stack($engine, empty($merged['action']) ? 'index' : $merged['action'])->run($env);
		
		if(empty($ret[1]['X-Cascade']) OR $ret[1]['X-Cascade'] !== 'pass')
		{
			return $ret;
		}
		array_pop($matches);
	}

	return array(404, array('X-Cascade' => 'pass'), '');
};