How to use optional parameters in URI path in Yii framework

Yii - is one of my favorite frameworks. I've done a few projects using this framework and have been always satisfied with its functionality, flexibility, performance and community support. This post starts a series of "how to" articles where I will give some tips, advises and best practices.

If you need to use optional parameters in URLs here is how you can do it in UrlManager:

<?php
$routing = array(
    'view/<user_id:[\d+]>(/<action:.*?>)?'=>'user/view'
);
?>

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