采用行写方式的聊天程序（之五）

lt4.php
处理定时刷新问题
<?
session_start();
include("g_fun.php");
f_connectdb();

$tmpi = 0;
$query  = "select lt_id,lt_speaker,lt_face,lt_speaked,lt_time,lt_content from lt_t_content";
$query .= "  where lt_id > ".$chat_hh. " order by lt_time ";
$res = mysql_query($query, $dbh);  
while ($row = mysql_fetch_array($res)) {  
   ?>
   <script Language=JavaScript1.1>
   var zt="<? echo '0'; ?>";
   var un="<?echo $row['lt_speaker'];?>";
   var tw="<?echo $row['lt_speaked'];?>";
   var sa="<?echo $row['lt_content'];?>";
   parent.f2.nw(zt,un,tw,sa);    //向显示处写入最新的数据.
   </script>
   <?
   $tempi=$row['lt_id'];
}
if ($tempi > $chat_hh) {
  $chat_hh = $tempi;
}
?>
<script Language=JavaScript>
setTimeout('this.location.reload()',5000);</script>

ltonline.php
处理在线用户信息

<?
  include("g_fun.php");
  f_connectdb();

  //删除长时间没有发言的用户信息
  $query  = "update  lt_t_online set lt_state = '1' where (now() - lt_lasttime) > 500";
  $res = mysql_query($query, $dbh);  
   
  print " 在线人员信息<br>";
  $query  = "select lt_username from lt_t_online where lt_state = '0'";
  $res = mysql_query($query, $dbh);  
  while ($row = mysql_fetch_array($res)) {  
    print $row["lt_username"].'<br>';
  }
?>
<script Language=JavaScript>
setTimeout('this.location.reload()',5000);</script>



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