Routes
One of the cornerstones of developing a Symfony application is working with routes. The routing infrastructure ensures that we can use readable URLs (for example, /products/hammer instead of index.php?page=products&productid=12345) and that these URLs are mapped to a controller in our application that can respond to requests.
The Symfony Plugin provides several facilities for working with routes.
Install the required plugins
This functionality relies on the PHP, Symfony Support, and PHP Annotations plugins that should be installed and enabled in your IDE.
The plugins are available only in IntelliJ IDEA Ultimate.
Press Control+Alt+S to open the IDE settings and select .
Switch to the Marketplace tab and use the search field to find the plugins.
Click Install next to each plugin and restart the IDE if prompted.
Code completion for routes
IntelliJ IDEA provides code completion for functions that take a route name as an argument. In the editor, press Control+Space to invoke code completion and do any of the following:
Specify arguments for such controller functions as
generateUrlorforward.
Specify arguments for such Twig functions as
pathorcontroller.
Navigation for routes
Since routes are linked to a controller, you can use Navigate to declaration Control+B on a route to navigate to the corresponding controller. Alternatively, Control+LeftClick the service's name.
To navigate back to a route mapped to a controller, click the route icon 
in the editor gutter.
Missing route inspection
Whenever you use the name of a route that is not defined or misspelled, IntelliJ IDEA displays the corresponding warning from the Missing Route inspection. .
