<?php
$imagetypes = array("image/jpeg");

function getImages($folder) {
        $images = array();
        $directory = dir($folder);
        while(($entry = $directory->read()) !== false) {
                if($entry == '.' || $entry == '..' || !strstr($entry, '.')) {
                        continue;
                }
                $images[] = $entry;
        }
        return $images;
}

if(isset($_GET['p'])) {
    $pagination_start = intval($_GET['p']);
} else {
    $pagination_start = 0;
}

$images_per_page = 20;
$path = "tattoos";
$docroot = "$path";

$images = getImages($path);
$images_start = $pagination_start * $images_per_page;
$images_end = $images_start + $images_per_page;
$pages_total = ceil(count($images) / $images_per_page);

for($i = $images_start; $i < $images_end; $i++) {
    $image = $images[$i];
    echo "<a href='{$path}/{$image}'>";
    $filename = explode('.', $image);
    echo "<img class='photo' src='{$path}/{$filename[0]}th.{$filename[1]}'>";
    echo "</a>\n";
}

echo "<ul>";
for($i = 1; $i <= $pages_total; $i++) {
    echo "<li><a href='index.php?page=gallery&gallery=tattoos&p={$i}'>{$i}</a></li>";
}
echo "</ul>";

?>