[PHP] Does this If statement make sense?

[Jeff]

I'm again working with someone else's code and I have a problem I
believe is in the section below.  The problem is, I can't seem to
understand what the "IF" conditions are saying here.  The problem I have
is with the second condition.  To me this reads in psudo code:

If( X and (if Y exists, then W otherwise Z))

Does this work?  If so how is it evaluated?

Here is the actual code.
<code>

if ($tostaf  && ($reply->comment ? $config->send_comment_staf :
$config->send_emailreply_staf)) 
    {
        $to=array();
 
$vars["ticketurl"]=$config->webpath."ticket.php?id=".$ticket->id;
        if ($reply->comment) {
            $condition=" AND followups.employee<>'$reply->employee'";
    }

</code> 

Thanks,

Jeff

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