thanks for this nice code. As I needed more case insensitive and more flexible mapping, I have some suggestions:

1/to enable case insensitive mapping,
a/ modify (line 12) in INDEX.PHP into
$route->routeURL( strtolower(preg_replace( “|/$|”, “”, $_GET['_route_'] ) ) );

b/ then use always lower case for mapping for the $routes

2/ to better regexp mapping support,
a) change in class PUR delimiters for eg ` (as regxp symvol | is used to indicate OR),
preg_match( “`{$path}`i”, $url, $match );
b) skip cropping of last character /, modifing the route call
$route->routeURL( strtolower( $_GET['_route_'] ) );

3) I am comming from a Python World, I wanted controlers like in Webpy (see http://webpy.org), So I have defined additionaly:

class Webpy {
function request($args = false) {
if (empty($_POST)) {
$this->GET($args);

} else {
$this->POST($args);
}

} // function request

function GET($args=false) {
echo “Exception: GET() not defined in
(class: “.$_GET["_route_"].” file: “.$_SERVER['PHP_SELF'].”)”;
}

function POST($args=false) {
echo “Exception: POST() not defined in
(class: “.$_GET["_route_"].” file: “.$_SERVER['PHP_SELF'].”)”;
}

} // class Webpy

class DEMO extends Webpy {

function GET($args=false) { }
function POST($args=false) { }
}

$routes = …
‘^article/year/(\d{4}/\d+)$’ => array(“DEM0″, “request”)
…
example: http://localhost/article/year/2009/2345

greetings from France