Include CSS,javascript file in Yii Framework

Also, if you want to add module assets both CSS and JS, you can use the following logic. See how you need to indicate the correct path to getPathOfAlias:

public static function register($file)
{
    $url = Yii::app()->getAssetManager()->publish(
    Yii::getPathOfAlias('application.modules.shop.assets.css'));

    $path = $url . '/' . $file;
    if(strpos($file, 'js') !== false)
        return Yii::app()->clientScript->registerScriptFile($path);
    else if(strpos($file, 'css') !== false)
        return Yii::app()->clientScript->registerCssFile($path);

    return $path;
}

The above code has been taken from GPLed Yii based Webshop app.

In Yii framework, You can include js and css using below method.

Including CSS:

{Yii::app()->request->baseUrl}/css/styles.css

Including JS:

{Yii::app()->request->baseUrl}/js/script.js

Including Image:

{Yii::app()->request->baseUrl}/images/logo.jpg

Note: By using layout concept in yii, You can add css and js instead of specifying in view template.

Add the CSS and JS in The Layout Folder.Access anywhere in the project

  <!--// Stylesheets //-->
    <?php
        $themepath=Yii::app()->theme->baseUrl;
        Yii::app()->clientScript->registerCoreScript("jquery");
    ?>

        <link href="<?php echo $themepath."/css/custom.css"; ?>" rel="stylesheet" media="all" />


<!--// Javascript //-->
<?php Yii::app()->clientScript->registerCoreScript("jquery"); ?>
</script> -->
<script type="text/javascript" src="<?php echo $themepath; ?>/js/video.min.js"></script>