unzip a zip file on windows, preserve the right encode chinese

unzip_windows.php

<?php

  $zip = new ZipArchive;
  $res = $zip->open($file);
  if ($res === TRUE) {
    for ($i=0;($filename=$zip->getNameIndex ($i))!==false; $i++) {
      echo "$filename\n";
      if ($filename[strlen($filename)-1] == '/') {
        $filename = iconv('UTF-8', 'GBK', $filename);
        if (!is_dir($filename)) {
          mkdir($filename);
        }
      } else {
        $filename = iconv('UTF-8', 'GBK', $filename);
        file_put_contents($filename, $zip->getFromIndex($i));
      }
    }
      echo 'OK ',date("Y-m-d H:i:s");
      // $zip->extractTo('.');
      // $zip->close();
  } else {
      echo 'failed, code:' . $res;
  }