imagenes_en_dir = listgal("fotos/", ".jpg$|.jpeg$|.png$|.gif$");

function listgal($dr, $mk)
{
	$fg = Array();

	if($hd = opendir($dr))
	{
		while (false !== ($fn = readdir($hd)))
		{
			if($fn == "." || $fn == "..") continue;

			if(is_file($dr."/".$fn))
			{
				if(eregi($mk, $fn))
				{
					$fz = filesize($dr. "/" . $fn);
					$iz = getimagesize($dr. "/". $fn);
					
					if($iz[0] && $iz[1] && $fz)
						$fg[] = array("name" => $fn, "width" => $iz[0],  "height" => $iz[1], "size" => $fz, "type" => $iz[2]);
				}
			}
		}
		closedir($hd);
       }
       return $fg;
}