!! +var+ +random+ +datafile+
$lst_tit randfile$lst_titend$type_var
  $lst_alias randrecord
  $(lst_syntax)randfile $emph fname$emphend</tt>
  $lst_mean 返回数据文件 $emph fname$emphend 内随机选取的记录.
  <p>
  !read datafile.phtml

