What is the purpose of the code snippet provided for creating a user ban in a chat using PHP?

The purpose of the code snippet provided is to demonstrate how to implement a user ban functionality in a chat application using PHP. This code snippet allows the chat application to prevent a specific user from sending messages or participating in the chat.

// Assume $userId is the ID of the user to be banned
// Update the user's status to 'banned' in the database
$query = "UPDATE users SET status = 'banned' WHERE id = $userId";
$result = mysqli_query($connection, $query);

if ($result) {
    echo "User has been banned successfully.";
} else {
    echo "Error banning user.";
}