Prosím o pomoc

$settings["thumbsdir"]="thumbs/";
$settings["imagesperpage"]=9;
@$dirhandle=opendir('.');
while ((@$filename=readdir($dirhandle))!==false)
      {
      if (eregi("jpg|gif|png|JPG|GIF|PNG",$filename))
         {
         $files[]=$filename;
         if (!file_exists($settings["thumbsdir"].$filename))
            {
            if (eregi("jpg|JPG",$filename)) $image=imagecreatefromjpg($filename);
            elseif (eregi("gif|GIF",$filename)) $image=imagecreatefromgif($filename);
            elseif (eregi("png|PNG",$filename)) $image=imagecreatefromjpeg($filename);
            $width=imagesx($image); $height=imagesy($image);
            $thumbw=$width/10; $thumbh=$height/10;
            $image2=imagecreatetruecolor($thumbw,$thumbh);
            imagecopyresampled($image2,$image,0,0,0,0,$thumbw,$thumbh,$width,$height);
            if (eregi("jpg|JPG",$filename))
               {
               imagejpeg($image2,$settings["thumbsdir"].$filename,80);
               }
            elseif (eregi("gif|GIF",$filename))
               {
               imagegif($image2,$settings["thumbsdir"].$filename);
               }
            elseif (eregi("png|PNG",$filename))
               {
               imagepng($image2,$settings["thumbsdir"].$filename);
               }
            }
         }
      }
sort($files);
if (isset($_GET["image"])) $key=array_search($_GET["image"],$files);
else $key=0;
list($width,$height)=getimagesize($files[$key]);
echo '<img src="',$files[$key],'" width="',$width,'" height="',$height,'" alt="',$files[$key],'" /><br />';
?>
</div>
<div id="position">
<?
$totalfiles=count($files);
echo '<span>',$key+1,'/',$totalfiles,'</span>';
?>
</div>
<div id="thumbnails">
<?
$halfperpage=floor($settings["imagesperpage"]/2);
if ($key<$halfperpage)
   {
   $start=0;
   $end=$settings["imagesperpage"]-1;
   }
elseif ($key+$halfperpage>$totalfiles-1)
   {
   $start=$totalfiles-$settings["imagesperpage"];
   $end=$totalfiles-1;
   }
else
   {
   $start=$key-$halfperpage;
   $end=$key+$halfperpage;
   }
for ($i=$start;$i<=$end;$i++)
   {
   echo '<a href="index.php?image=',$files[$i],'"><img src="',$settings["thumbsdir"],$files[$i],'" alt="',$files[$i],'" /></a>';
   }
?>
</div>
<div id="navigation">
<?
if ($key) echo '<a href="index.php?image=',$files[$key-1],'">&lt;&lt; Previous</a> | ';
if ($key+1<count($files)) echo '<a href="index.php?image=',$files[$key+1],'">Next &gt;&gt;</a>';
?>
<br />Pages:
<?
$totalpages=ceil($totalfiles/$settings["imagesperpage"]);
for ($i=0;$i<$totalpages;$i++)
   {
   $pagekey=$i*$settings["imagesperpage"];
   echo '<a href="index.php?image=',$files[$pagekey],'">';
   if ($settings["imagesperpage"]==1) echo $files[$pagekey];
   else echo ' ',$i+1;
   echo '</a>';
   if ($i<$totalpages-1) echo ' | ';
   }