register session onclick?

[v3nt]

i have a list of images that i can add to a favourites page if they want to. how can i create a session using a btn or link?
and on each click after the first create another session variable...

onclick
"<? $x=$SESSION['numb']+1;
session_register('xxx'.$x);
$SESSION['xxx'.$x] = $thisone;

[thorpe]

onlick is a client side action. php runs on the server. for this to happen, you onclick would need to submit either via post or get to a php script on the server.

something like...

<?php

  if (isset($_GET['fav'])) {

$_SESSION['numb'] = $_SESSION['numb']+1;
$_SESSION['xxx'.$_GET['fav']] = $_GET['fav'];
  }

?>

and your links

<a href="<?= $_SERVER['PHP_SELF'] ?>?fav=34">add to session</a>