Create zip file of images and download in php

This is a very useful code to create Zip File which contain images and start download that zip.

Code: to create zip file

<?php 
$files = array(); /*Image array*/

# create new zip opbject
$zip = new ZipArchive();

# create a temp file & open it
$tmp_file = tempnam('.','');
$zip->open($tmp_file, ZipArchive::CREATE);

# loop through each file
foreach($files as $file){

    # download file
    $download_file = file_get_contents($file);

    #add it to the zip
    $zip->addFromString(basename($file),$download_file);

}

# close zip
$zip->close();

# send the file to the browser as a download
header('Content-disposition: attachment; filename=download.zip');
header('Content-type: application/zip');
readfile($tmp_file);
?>

Thanks