$uri = str_replace($_SERVER["SCRIPT_NAME"], "", $_SERVER["REQUEST_URI"]);
$parts = preg_split("#[/\\\\]+#", $uri);
switch (strtolower($parts[0])) {
  case "homepage": view_homepage(); break;
  case "profile":
    switch (strtolower($parts[1])) {
      case "edit": ...
      case "delete": ...
    }
  ...
}