$username = "john_doe"; $user_id = idFromName($username); echo "User ID for $username is: $user_id"; // Output: User ID for john_doe is: 123
$user = "mary_smith"; $id = idFromName($user); $update_query = "UPDATE users SET status='active' WHERE id='$id'"; // The above query will update the 'status' field to 'active' for the user 'mary_smith'.This function is not a part of any standard PHP library or package. It may either be a custom function written by the developer, or a function from a third-party library.