// Example 1: Load a JavaScript file from a CDN Yii::app()->getClientScript()->registerScriptFile('https://code.jquery.com/jquery-3.6.0.min.js'); // Example 2: Load a local JavaScript file from the "js" folder Yii::app()->getClientScript()->registerScriptFile(Yii::app()->baseUrl . '/js/script.js'); // Example 3: Load a local JavaScript file with dependencies Yii::app()->getClientScript()->registerScriptFile(Yii::app()->baseUrl . '/js/script.js', CClientScript::POS_HEAD, array('jquery'));In Example 1, the scriptFile function is used to load the jQuery library from a CDN. The function takes a single argument, which is the URL of the script file. In Example 2, the scriptFile function is used to load a local JavaScript file called "script.js" from the "js" folder. The baseUrl property is used to get the root URL of the application. In Example 3, the scriptFile function is used to load a local JavaScript file with dependencies. The third argument is an array that specifies the dependencies of the script file. In this case, the jQuery library is specified as a dependency. The CHtml library is part of the Yii Framework, a PHP framework for building web applications.