zipFile - addFilesToZip

/**
  example usage:

    addFilesToZip("/home/user/my/dir/anyfilename.zip",
      array('/home/my/dir/file1.zip','/home/my/dir/file2.zip'));
*/
public function addFilesToZip($zipFullFileName, $fileList){
        $zip = new ZipArchive;
        if ($zip->open($zipFullFileName,ZIPARCHIVE::OVERWRITE) === TRUE){
                foreach($fileList as $filename)
                        $zip->addFile($filename);
                $zip->close();
        }
}