Stop writing the same regex for #[Route]

Did you know Symfony ships with a built-in class full of pre-defined route requirement patterns? It's called Requirement , and it lives in Symfony\Component\Routing\Requirement . Instead of writing your own regex for common route parameters like UUIDs, slugs, date formats, or locale codes, you can just reference a constant. So instead of this mess in your route attribute: # [ Route ( '/users/{id}' , requirements : [ 'id' => '[0-9a-f]{8}-[0-9a-f]{4}-' . '[0-9a-f]{4}-[0-9a-f]{4}-' . '[0-9a-f]{12}' , ])] public function show ( string $id ): Response { // ... } You write: # [ Route ( '/users/{id}' , requirements : [ 'id' => Requirement :: UUID , ])] public function show ( string $id ): Response { // ... } Instead of: # [ Route ( '/blog/{slug}' , requirements : [ 'slug' => '[a-z0-9]+(?:-[a-z0-9]+)*' , ])] public function post ( string $slug ): Response { // ... } You write: # [ Route ( '/blog/{slug}' , requirements : [ 'slug' => Requirement :: ASCII_SLUG , ])] public function post ( string