A basic PHP Gallery function

gistfile1.php

<?php

    function genGallery($path)
    {
        $files = scandir("$path");
        $pages = array_chunk($files, 12);

        $pn = (int) $_GET['page'];

        foreach ($pages[$pn] as $file) {
            if ($file != "." && $file != "..") {
                echo "<a href=\"images/$file\" rel=\"lightbox[group]\" title=\"\">";
                echo "<img src=\"images/$file\" alt=\"\" />\n";
                echo "</a>\n";
            }
        }

        for ($i = 1; $i < count($pages) + 1; $i++) {
            echo "<a href=\"index.php?page=$i\">$i</a>\n";
        }
    }

?>