PHP实现自动识别原编码并对字符串进行编码转换的方法

/**
 * 对数据进行编码转换
 * @param array/string $data 数组
 * @param string $output 转换后的编码
 * Created on 2016-7-13
 */
function array_iconv($data, $output = 'utf-8') {
  $encode_arr = array('UTF-8','ASCII','GBK','GB2312','BIG5','JIS','eucjp-win','sjis-win','EUC-JP');
  $encoded = mb_detect_encoding($data, $encode_arr);
  if (!is_array($data)) {
    return mb_convert_encoding($data, $output, $encoded);
  }
  else {
    foreach ($data as $key=>$val) {
      $key = array_iconv($key, $output);
      if(is_array($val)) {
        $data[$key] = array_iconv($val, $output);
      } else {
      $data[$key] = mb_convert_encoding($data, $output, $encoded);
      }
    }
  return $data;
  }
}