What best practices should be followed when creating functions for specific user roles in PHP applications?

When creating functions for specific user roles in PHP applications, it is important to follow best practices to ensure security and maintainability. One approach is to use role-based access control (RBAC) to define specific roles and permissions for each user. This can be implemented by creating separate functions for each role and checking the user's role before executing the function.

// Example of creating functions for specific user roles using RBAC

function adminFunction() {
    // Functionality for admin users
}

function editorFunction() {
    // Functionality for editor users
}

function userFunction() {
    // Functionality for regular users
}

// Check user role and call the appropriate function
$userRole = getUserRole(); // Assuming this function retrieves the user's role
if ($userRole == 'admin') {
    adminFunction();
} elseif ($userRole == 'editor') {
    editorFunction();
} else {
    userFunction();
}