该程序为整个系统的入口，含有两个全局参数：chat_hh,uname分别记录当前最大的发言序号和发言者名称
<?
session_start();
session_register("chat_hh");
session_register("uname");
//取数据库最大编号
include("g_fun.php");
f_connectdb();
$query;;= "select max(lt_id) as rmaxid from lt_t_content"
$res = mysql_query($query, $dbh);;;
$row = mysql_fetch_array($res);
$f_chat_hh =;;$row["rmaxid"];
if (empty($f_chat_hh)) { $f_chat_hh = 0; }
if ($f_chat_hh > 12 ) {
;;;$chat_hh=$f_chat_hh - 12;
} else
$chat_hh=$f_chat_hh;
$un_len=strlen($name);
$uname=$name;
//增加在线人员信息
$query;;= "select count(*) as rcount from lt_t_online where lt_username = '".$name."'"
$res = mysql_query($query, $dbh);;;
$row = mysql_fetch_array($res);
$lcount =;;$row["rcount"];
if ($lcount == 0) {
;;;$query;;= "insert into lt_t_online(lt_username,lt_lasttime) values("
;;;$query .= "'".$name."',now())"
;;;$res = mysql_query($query, $dbh);;;
}
$query;;= "update lt_t_online set lt_lasttime = now(),lt_state = '0' "
$query .= " where lt_username = '".$name."'"
$res = mysql_query($query, $dbh);;;
?>
<html>
<head>
<title>PHP无刷新感聊天室</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script Language=JavaScript>
function wu(){
var un="<?echo $name;?>"
this.f2.document.fyq.username.value=un;
this.f2.document.fyq.username.size=<?echo $un_len;?>
}
</script>
</head>
<frameset cols='*,140' border=1 frameborder=1 framespacing=>
<frameset rows="0,*,70,0" border="1" framespacing="0" frameborder="yes">
;;<frame src="about:blank" name="tforlt4">
;;<frame src="about:blank" name="f1" marginheight="3" marginwidth="5">
;;<frame src="ltsayno.php" name="f2">
;;<frame src="about:blank" name="bforlt3">
</frameset>
<frameset rows='*,150' border=1 frameborder=1 framespacing=0>
;;<frame src='ltonline.php' name='f3' marginwidth=0 scrolling='auto'>
;;<frame src="about:blank" name='f4' marginwidth=0>
</frameset>
</frameset>
<noframes>
<body bgcolor="#FFFFFF">
</body></noframes>
</html>;;
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