Extended ZipArchive - simply way to create zip with subdirectories

FlxZipArchive.class.php

<?php

class FlxZipArchive extends ZipArchive
{

    /**
     * Add a Dir with Files and Subdirs to the archive
     *
     * @param string $location Real Location
     * @param string $name Name in Archive
     * */
    public function addDir($location, $name)
    {
        $this->addEmptyDir($name);
        $this->addDirDo($location, $name);
    }

    /**
     * Add Files & Dirs to archive.
     *
     * @param string $location Real Location
     * @param string $name Name in Archive
     * */
    private function addDirDo($location, $name)
    {
        $name .= '/';
        $location .= '/';

        // Read all Files in Dir
        $dir = opendir($location);
        while ($file = readdir($dir)) {
            if ($file == '.' || $file == '..')
                continue;

            // Rekursiv, If dir: FlxZipArchive::addDir(), else ::File();
            $do = (filetype($location . $file) == 'dir') ? 'addDir' : 'addFile';
            $this->$do($location . $file, $name . $file);
        }
    }

}

// usage
$zip = new FlxZipArchive();
$res = $zip->open($zipDirectory . '.zip', ZipArchive::CREATE);
                    
if ($res === TRUE) {
  $zip->addDir($zipDirectory, basename($zipDirectory));
  $zip->close();
} else {
  echo 'error while creating zip'; exit;
}

?>