Refresh page when a file is uploaded

[rullbandspelare]

I have a directory that contains images wich are displayed with this code:

(All it does, is going through all the images in the directory and displays them).

 

<?php 
   function file_type($file){
       $path_chunks = explode("/", $file);
       $thefile = $path_chunks[count($path_chunks) - 1];
       $dotpos = strrpos($thefile, ".");
       return strtolower(substr($thefile, $dotpos + 1));
       $bild = $_POST["bild"];
   }
   $file_count = 0;
   $path = "../images/";
   $file_types = array( 'jpg', 'png', 'gif');
   $p = opendir($path);
       while (false !== ($filename = readdir($p))) {
           $files[] = $filename;
       }
   sort($files);
       foreach ($files as $file) {
           $extension = file_type($file);
           if($file != '.' && $file != '..' && array_search($extension, $file_types) !== false){
               $file_count++;
               echo '<a href="../index.php"target="_top"><img src="'.$path.$file.'" width="110" height="90"></a><br>'.$file.''.'<br>
';
           }
       }
   if($file_count == 0){
       echo "<b>EMPTY</b>";
   }
?>

 

It is important that it is automaticaly refreshed when the directory content changes. Now I have put a

<meta http-equiv="refresh" content="20"> there.

But it is important that it does not refresh when no new images are arriving/leaving the directory.

I have some control on how the add/delete is carried out. So i could add a "flagfile" to indicate if something has been removed or added.  and base the refresh on that ...or?

 

HELP!  Can this be done with the help of AJAX?Any input is appreciated!

 

/tomas