code: private function _imgWidthAndHeight($name, $data)
      {
          if (empty($data[2]) && empty($data[3])) {
              $data = "<img src=\"{$data[4]}\" />";
          } elseif (!empty($data[2]) && empty($data[3])) {
              $data = "<img width=\"{$data[2]}\" src=\"{$data[4]}\" />";
          } elseif (empty($data[2]) && !empty($data[3])) {
              $data = "<img height=\"{$data[3]}\" src=\"{$data[4]}\" />";
          } else {
              $data = "<img width=\"{$data[2]}\" height=\"{$data[3]}\" src=\"{$data[4]}\" />";
          }
          return $data;
      }
docs: 解析含有width和height属性的图片标签
  @param  string $name 标签名
  @param  array  $data 解析数据 [2] - width, [3] - height, [4] - 图片URL
  @return string       解析后的标签