Brae

<?php



function getDirTree($dir,$p=true) {
    $d = dir($dir);$x=array();
    while (false !== ($r = $d->read())) {
        if($r!="."&&$r!=".."&&(($p==false&&is_dir($dir.$r))||$p==true)) {
                $x[$r] = (is_dir($dir.$r)?array():(is_file($dir.$r)?true:false));
        }
    }

    foreach ($x as $key => $value) {
        if (is_dir($dir.$key."/")) {
                $x[$key] = getDirTree($dir.$key."/",$p);
        }
    }

    ksort($x);
    return $x;
}
$path = "./res/gallery/painting/";
$tree = getDirTree($path);

echo '<div id=gallery>';

foreach($tree as $element => $eval) {
    if (is_array($eval)) {
        foreach($eval as $file => $value) {
                if (strstr($file, "png")||strstr($file, "jpg")||strstr($file, "bmp")||strstr($file, "gif")) {
                        $item = $path.$file;
            $itemthumb = $path.'/thumbs/'.$file;
                        echo '<a href="'.$item.'"><img src="'.$item.'" alt="'.$item.'"/></a>';
                }
        }
    }
}

echo '</div>';