How can the use of user group divisions impact the functionality of PHP scripts?

User group divisions can impact the functionality of PHP scripts by restricting access to certain parts of the script based on the user's group. This can help improve security and ensure that only authorized users can perform certain actions within the script. To implement user group divisions in PHP, you can use conditional statements to check the user's group and only allow access to specific parts of the script based on their group.

$userGroup = "admin";

if($userGroup == "admin"){
    // Code that only admin users can access
    echo "Welcome, admin!";
} else {
    // Code for regular users
    echo "You do not have permission to access this page.";
}