online.php

Download you own three BR

<?php
$duration=1800;
$db->query("DELETE FROM online WHERE '".time()."'-`dtstamp` > '".$duration."'"); 
//删除超过5分钟的记录 

$query=$db->query("SELECT * FROM online WHERE `u_id`='".$_COOKIE['UserId']."'");
$result = $db->fetch_array($query);
//判断当前的用户是否在该表中存在
if ($result) 
{ 
$id=$result['id']; 
$db->query("UPDATE online SET `dtstamp`='".time()."', `uri`='".$_SERVER['REQUEST_URI']."' WHERE id='$id'"); 
//设置最后访问时间和访问页面

if($result['last_time']){
	//在线增长经验
	$score = round((time() - $result['last_time']) / 60,0) * 2;
	$remain_second = (time() - $result['last_time']) % 60;
	if($score>=2){
		$db->query("UPDATE online SET `last_time`='".(time()+$remain_second)."' WHERE id='$id'");
		$db->query("update player_info set `p_score`=(`p_score`+'".$score."') where `u_id`='".$_COOKIE['UserId']."' ");
	}
}

} 
else//没有 
{ 
$db->query("INSERT INTO online VALUES ('','".$_COOKIE['UserId']."','".$_SERVER['REMOTE_ADDR']."', '".time()."', '".$_SERVER['REQUEST_URI']."' ,'".time()."')"); 
} 
$query=$db->query("SELECT COUNT(*) AS online FROM online WHERE '".time()."'-`dtstamp` <= '".$duration."'");
$counter = $db->fetch_array($query);
$counter_num = $counter['online']; 
?>