title: Pass path parameters automatically
body: <p>I'm building a site where the user can choose a country, state and city he wants.</p>
  
  <p>Once he selects these parameters he goes to a page like this: <code>en.example.com/spain/madrid/madrid/</code></p>
  
  <p>The problem is, every time I want to build a new url, I must pass these 3 variables and I was wondering if I could do something to make them just like the <code>_locale</code> variable which symfony itself passes it to the parameters.</p>
  
  <p>Thanks</p>