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标题: 两种统计当前在线人数的方法 [打印本页]

作者: tznktg 时间: 2007-9-29 21:34
标题: 两种统计当前在线人数的方法
根据我的上篇文章《也谈网站在线人数统计》，我写的在线人数统计程序源代码如下：如有错误请指正。

db层：
db_online.php

//该函数使用户自己在线，并且检查其他用户的在线情况
function checkOnline($userid,$tempid=null)
{
$conn = connect();

//对于所有用户
//先设置自己为在线
$stmt = "UPDATE ".DB_NAME.".USER SET IsOnline='Y' WHERE UserID=".$userid;
$result = query($stmt,$conn);
//info($stmt);
//如果当前用户是游客
if ($tempid != null)
{
$stmt = "SELECT TempID FROM ".DB_NAME.".TEMPUSER WHERE

TempID=".$tempid;
$result = query($stmt,$conn);
//info($stmt);
//如果该游客还在线
if ($row = fetch_array($result))
{
$stmt = "UPDATE ".DB_NAME.".TEMPUSER SET

RequestTime='".getCurrentTime()."' WHERE TempID=".$tempid;
$result = query($stmt,$conn);
//info($stmt);
}
//该游客已经离线
else
{
$stmt = "INSERT INTO ".DB_NAME.".TEMPUSER

VALUES('".$tempid."','".getCurrentTime()."')";
$result = query($stmt,$conn);
//info($stmt);
}
}

//查看其他用户
//普通用户
$stmt = "UPDATE ".DB_NAME.".USER SET IsOnline='N' WHERE ".time()." -

unix_timestamp(RequestTime) > ".ONLINE_DURATION." AND UserGroupID != ".GUEST;
$result = query($stmt,$conn);

//游客
$stmt = "DELETE FROM ".DB_NAME.".TEMPUSER WHERE ".time()." -

unix_timestamp(RequestTime) > ".ONLINE_DURATION;
$result = query($stmt,$conn);
disconnect($conn);
}

//得到在线人数，分用户和游客
function getOnlineNumber()
{
$olnum = array();
$conn = connect();
$stmt = "SELECT COUNT(UserID) FROM ".DB_NAME.".USER WHERE IsOnline='Y' AND

UserGroupID != 4"; //4 为guest的用户组id
//info ($stmt);
$result = query($stmt,$conn);
$olnum['user'] = result($result,0,"COUNT(UserID)");
$stmt = "SELECT COUNT(TempID) FROM ".DB_NAME.".TEMPUSER";
//info ($stmt);
$result = query($stmt,$conn);
if ($row = fetch_array($result))
{
$olnum['guest'] = $row['COUNT(TempID)'];
}
disconnect($conn);
return $olnum;
}

其中的connect(), disconnect(), query(),fetch_array()函数在dbmanager.inc.php中
dbmanager.inc.php

define("DB_NAME","databasename");
define("DB_USER","user");
define("DB_PASS","pass");
define("DB_HOST","localhost");

function connect()
{
//echo "Connecting to Host:".HOST." ";
$conn = mysql_connect(DB_HOST,DB_USER,DB_PASS);
mysql_select_db(DB_NAME);
/*
if ($conn)
{
echo "Connect to database sucessfully. connection id:".$conn." ";
}
else
{
echo "Connect to database failed. ";
}
*/
return $conn;
}

function pconnect()
{
return mysql_pconnect(DB_HOST,DB_USER,DB_PASS);
}

function disconnect($conn)
{
$close = mysql_close($conn);
/*
if ($close)
echo "MySQL Database disconnected. ";
else
echo "MySQL Database disconnecting failed. Please try again. ";
*/
}

function query($stmt,$conn)
{
return mysql_query($stmt,$conn);
}

function fetch_array($result)
{
return mysql_fetch_array($result);
}

function fetch_row($result)
{
return mysql_fetch_row($result);
}

function num_rows($result)
{
return mysql_num_rows($result);
}

function result($result,$row,$field)
{
return mysql_result($result,$row,$field);
}

rule层：
rl_online.php
function getOnline()
{
if ($userid == 2)
{
if (session_is_registered("tempuserid"))
{
checkOnline($userid,$tempuserid);
}
}
else
{
checkOnline($userid);
}
return getOnlineNumber();
}

ui层：
ui_online.php
$online_num = getOnline();
echo "在线人数，注册用户".$online_num['user']."人，游客".$online_num['guest']."人";

作者: tznktg 时间: 2007-9-29 21:34
利用文件属性结合Session实现在线人数统计

<?php
ob_start();
session_start();
$num=0;
$dirpt = "online";
$reftime = 1;

if (is_dir($dirpt) && $dir = opendir($dirpt)) {
 while (($file = readdir($dir)) !== false) {
if(strcmp($file,"..")==0 || strcmp($file,".")==0){
 continue;
}
$D_[date("Y-m-d H:i:s",filemtime($dirpt."/".$file))]=$file;
$num++;
unset($cum);
 }
 closedir($dir);
 $filename = session_id();
 $fp = fopen($dirpt."/".$filename,"w");
 fputs($fp,"");
 fclose($fp);

 $ntime = date("Y-m-d H:i:s",mktime(date("H"),date("i")-1,0,date("m"),date("d"),date("Y")));
 $D_[$ntime]="-";
 krsort($D_);
 $onlinenumber=0;
 while(1){
$vkey=key($D_);
$onlinenumber++;
if(strcmp($ntime,$vkey)==0){
 break;
}else{
 array_shift($D_);
}
 }
 array_shift($D_);
 reset($D_);
 while(count($D_)>0){
$ckey=key($D_);
unlink($dirpt."/".$D_[$ckey]);
if(!next($D_)){
 break;
}
 }

}else{
@chmod("..",0777);
@mkdir($dirpt,0777);

}
$online=$onlinenumber-1;
$retime=60*$reftime;
echo "当前在线$online人<meta http-equiv=refresh content=\"{$retime},url=\">";
ob_end_flush();
?>

作者: tznktg 时间: 2007-9-29 21:34
不用Golobal.asa和session实现在线人数统计

实现在线人数统计最常用的方法就是golobal.asa结合session做,但这种方法有两个不利:
1、每个session要占用12k的服务器内存空间，为了人数+1就要付出12k内存的代价。
2、golobal.asa要放在网站的根目录下才会起作用，而且根目录只能有一个golobal，矛盾突出。
为此，有一种使用cookie和application在asp文件中实现在线统计的方法，欢迎批评指正，共同探讨：

第一步:做一个框架,包含隐藏框架(count.asp)

第二步:编写count.asp
<%
user=request.cookies("21bbsusername")
totaluser=application("user")
if instr(totaluser,user)=0 then
 application.lock
application("user")=totaluser&";"&user
 application.unlock
end if
%>
<html>
<head>
<meta http-equiv="refresh" content="2">
</head>
<body>
</body>
</html>

第三步:显示
user=split(application("user"),";")
num=ubound(user)
response.write num

2006-6-12 08:22 #3

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