Question

I have this:

pm.php?v=unread

Now in unread, you can filter too by pressing Messages or Invites, and the links look like this:

<a href="?f=msgs">Msgs</a> | <a href="?f=invites">Inv.</a>

If you are inside pm.php?v=unread, and press on Msgs, it will turn out as pm.php?f=msgs.
And i wish it to be pm.php?v=unread&f=msgs

How can i do this?

Answer 1

<a href="?<?=($_GET['v']=="unread"?'v=unread&':'')?>f=msgs">Msgs</a>

or

<a href="?<?=($_GET['v']?'v='.$_GET['v'].'&':'')?>f=msgs">Msgs</a>