How can naming conventions for session variables impact the functionality and clarity of PHP scripts?

Naming conventions for session variables can impact the functionality and clarity of PHP scripts by making it easier to understand the purpose of each variable and ensuring consistency throughout the codebase. By using descriptive and meaningful names, developers can quickly identify the role of each session variable and reduce the likelihood of errors or confusion.

// Using meaningful naming conventions for session variables
$_SESSION['user_id'] = 123;
$_SESSION['username'] = 'john_doe';
$_SESSION['is_admin'] = true;