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

Steps :

1.) Get all session variable using $_SESSION.
2.) Check in every session key if it contain "Filter" string 
then unset it using unset($_SESSION[(someword)Filter]);

Try this :

foreach($_SESSION as $key => $value){
  if (strstr($key, 'Filter') == 'Filter') {
    unset($_SESSION[$key]);
  }
}