What are the potential risks of using unset($_SESSION) to delete session data in PHP, and what alternative approaches can be taken?

Using unset($_SESSION) to delete session data in PHP can potentially unset the entire $_SESSION array, leading to unintended consequences such as losing other session variables. Instead, it is recommended to unset specific session variables by using unset($_SESSION['variable_name']). This approach allows for targeted removal of session data without affecting other variables.

// Unset a specific session variable
unset($_SESSION['variable_name']);