Sript werkt wel op windows, en niet op linux

<?php

require_once('connect.php'); 
 
$id = $_GET['id'];


$sql= mysql_query("SELECT * FROM leden WHERE id = '".$id."'") or die(mysql_error());
while($res = mysql_fetch_assoc($sql))
{
	
	
	$hide = array('dat', 'php'); 
					$dir = "fotos/".$res['email']."/";    
					$handle=opendir($dir);     
 while (false!==($file = readdir($handle))) {     
    if (is_file($dir.$file)) {       
         $files[] = $file;   
         sort($files);   
reset($files);
    }     
 }    
 closedir($handle);     

   
for($i=0; $i < count($files); $i++)   
{   
				
          unlink($dir.$files[$i]); 
}	
	
	rmdir("fotos/".$res['email']);
}	
$sql=mysql_query("DELETE FROM leden WHERE id = '".$id."'") or die(mysql_error());
echo"<br/><center><table bgcolor=FF9900><tr><td>Account en informatie is verwijderd.</td></tr></table></center>";

?>

<?php
 
require_once('connect.php'); 
 
$id = $_GET['id'];
 
 
$sql= mysql_query("SELECT * FROM leden WHERE id = '".$id."'") or die(mysql_error());
while($res = mysql_fetch_assoc($sql))
{
 
 
	$hide = array('dat', 'php'); 
					$dir = "fotos/".$res['email']."/";    
					$handle=opendir($dir);     
 while (false!==($file = readdir($handle))) {     
    if (is_file($dir.$file)) {       
         $files[] = $file;   
         sort($files);   
reset($files);
    }     
 }    
 closedir($handle);     
 
 
for($i=0; $i < count($files); $i++)   
{   
 
          unlink($dir.$files[$i]); 
}	
 
	rmdir("fotos/".$res['email']);
}	
$sql=mysql_query("DELETE FROM leden WHERE id = '".$id."'") or die(mysql_error());
echo"<br/><center><table bgcolor=FF9900><tr><td>Account en informatie is verwijderd.</td></tr></table></center>";
 
?>