Unset all session variables with similar name

Question

I\'m using some $_SESSION variables for filtering many query records that have a similar name (ex. $_SESSION[\'nameFilter\'] or $_SESSION[\'cityF

Answer 1

Use foreach to enumerate the keys of $_SESSION[], use substr() to get the last 6 characters of each key, use unset() to (what else?) unset it.

As easy as:

session_start();
foreach (array_keys($_SESSION) as $key) {
    if (substr($key, -6) == 'Filter') {
        unset($_SESSION[$key]);
    }
}