ไม่สามารถติดต่อฐานข้อมูลได้ ";
exit ();
}
$time_now=time();
$time_out=$time_now + 0;
@session_start();
$sess_id=session_id();
$sql="delete from tb_useronline where online_id='$sess_id'
or online_time<'$time_now' ";
mysql_db_query($dbname,$sql);
$sql="insert into tb_useronline
values('$sess_id','$time_out')";
mysql_db_query($dbname,$sql);
$sql="select * from tb_useronline ";
$result=mysql_db_query($dbname,$sql);
$useronline=mysql_num_rows($result);
mysql_close();
echo "$useronline Online User";
?>
