Zip.php

<?php  
  function Zip($source, $destination)
  {
      if (!extension_loaded('zip') || !file_exists($source)) {
          return false;
      }

      $zip = new ZipArchive();
      if (!$zip->open($destination, ZIPARCHIVE::CREATE)) {
          return false;
      }

      $source = str_replace('\\', '/', realpath($source));

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

          foreach ($files as $file)
          {
              $file = str_replace('\\', '/', $file);

              // Ignore "." and ".." folders
              if( in_array(substr($file, strrpos($file, '/')+1), array('.', '..')) )
                  continue;

              $file = realpath($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();
  }

  zip('../www.zip', '../www')
?>