well, perhaps you should use this version to help you debug:
<?php
if (!isset(file)) {
?>
<form name="upload" method="post" action="upload.php" enctype="multipart/form-data">
<b>Foto uploaden:</b><br>
<input type="file" name="file"><br>
<input type="submit" name="Submit" value="Upload">
</form>
<?php
} else {
$uploaddir = "images/";
if (is_uploaded_file($file)) {
if (move_uploaded_file($file, $uploaddir . $file)) {
echo "Gelukt!";
} else {
echo "Failed!";
}
} else {
echo "Failed: not uploaded by POST method";
}
}
?>