What are the advantages of using a framework like yiiframework for developing PHP applications, particularly for handling user data and sessions?

When developing PHP applications that involve handling user data and sessions, using a framework like yiiframework can provide several advantages. Yii offers built-in security features such as data validation, authentication, and authorization, which help in protecting user data. Additionally, Yii provides easy-to-use session management functionalities, making it simpler to handle user sessions securely.

// Example code snippet using Yii framework for handling user data and sessions

// Setting a session variable
Yii::$app->session->set('user_id', $user->id);

// Retrieving a session variable
$user_id = Yii::$app->session->get('user_id');

// Validating user input
$model->load(Yii::$app->request->post());
if($model->validate()){
    // User input is valid
}else{
    // User input is not valid
}