I need to require a domain name in my symfony routing, my route looks like the following: domain_example: url: /routing/example/:domain_name param: { module: myModule, action: index, sf_format: json } requirements: { domain_name: '/^[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}$/' } I have also tried: requirements: { domain_name: '[/^[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}$/]' } If I call my route like so: mydomain.com/routing/example/otherdomain.com - I just get the module/action does not exist exception. Any advice appreciated - thanks everyone ^_^