Backup File and Folders ( Zip and Backup), This will zip directory with all sub-directory and file given as source path.

zip_backup.php

<?php
ini_set('max_execution_time', 600);
ini_set('memory_limit', '1024M');

BackupzipData('/path/to/folder', '/path/to/backup.zip');
echo 'Backup Finished. Please download from /path/to/backup.zip';

function BackupzipData($source, $destination) {
  if (extension_loaded('zip') === true) {
    if (file_exists($source) === true) {
      $zip = new ZipArchive();

      if ($zip->open($destination, ZIPARCHIVE::CREATE) === true) {
        $source = realpath($source);

        if (is_dir($source) === true) {
          $files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);

          foreach ($files as $file) {
            $file = realpath($file);

            if (is_dir($file) === true) {
              $zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
            }
            else if (is_file($file) === true) {
              $zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
            }
          }
        }
        else if (is_file($source) === true) {
          $zip->addFromString(basename($source), file_get_contents($source));
        }
      }
      return $zip->close();
    }
  }
  else {
    print "Zip Extension not Loaded";
  }
}