1765367563.zip// Create recursive directory iterator
/** @var SplFileInfo[] $files */
$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir), RecursiveIteratorIterator::LEAVES_ONLY);

foreach ($files as $name => $file) {
  // Skip directories (they would be added automatically)
  if (!$file->isDir()) {
    // Get real and relative path for current file
    $filePath = $file->getRealPath();
    $relativePath = substr($filePath, strlen($dir) + 1);

    // Add current file to archive
    $zip->addFile($filePath, $relativePath);
  }
}

// Zip archive will be created only after closing object
$zip->close();

//then prompt user to download the zip file
header('Content-Type: application/zip');
header('Content-disposition: attachment; filename=' . $zip_name);
header('Content-Length: ' . filesize($zip_name));
readfile($zip_name);

//cleanup the zip file
unlink($zip_name);

?>