<?php

$res = $zip->open($tempname,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE);

if ($res === TRUE) {

            // add the images
            foreach($valid_images as $image) {
                    $p = pathinfo($image);
                    echo "adding: ".$image." (".filesize($image).")<br>";
                    $zip->addFile($image,'images/'.$p['basename']);
            }

            // add the index.html file
            $zip->addFromString('index.html', $file);

            //close the zip
            $zip->close();
}
    ?>