title: Installing and using php-symfony-* components
body: <p>on my ubuntu machine I have installed php-symfony-routing using apt-get. When I tried to run the following code, the below error message appeared.</p>
  
  <pre><code>&lt;?php
  $routes = new \Symfony\Component\Routing\RouteCollection();
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>PHP Fatal error:  Uncaught Error: Class 'Symfony\Component\Routing\RouteCollection' not found in
  </code></pre>