Shop - include

<div class="call-to-action">
<a href="?action=vip" class="blue button">Vip</a>
<a href="?action=supervip" class="blue button">SuperVip</a>
<a href="?action=itemy" class="blue button">Itemy</a>
<a href="?action=doladuj" class="blue button">Doładuj</a>
</div>
<?php



if(isset($_GET['action'])){
    if($_GET['action'] == 'vip'){
        ...
    } elseif($_GET['action'] == 'supervip'){
        ...
    } elseif($_GET['action'] == 'itemy'){
        ...
    } elseif($_GET['action'] == 'doladuj'){
        ...
    } else {
    print '</div><div class="wrapper" style="text-align: center;width: 500px;">';
    print "<h1>Niezydentyfikowana funkcja</h1>";
    }
}
?>