刚用PHP写了一个网站在线人数的程序，请大家进来指点下！(页 1) - 电脑软件 - 捌玖网络工作室 |网页制作|平面设计|建站交流|代码资料|建站教程|主机域名|asp、php、jsp代码|网站素材

lilcy88 发表于 2008-5-28 10:40

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！7K j?J6lc
我是用PHP+MYSQL来写的，原理：网站在线人数的程序代码+后台有MYSQL数据库支持，可以直接统计出网站当前的在线人数。
首先我创建MYSQL数据库表。/~~!b8k0jn1oCo
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLGTMS$T0u
}可以使用的SQL语句。{eYVos(p+[I
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL, f6zo%VD3Z|g'Vl
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,L,wTt O#^
PRIMARY KEY (timestamp),
KEY ip (ip),o ^u3@zs
KEY file (file)W/^;J|%\W)j5x[PCr
);下面我们是PHP脚本，首先我定义MYSQL的信息。-\0SQ$Nn
$server = "localhost"; //你的服务器!auogW\,U+H
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码T6\`6D-A([8B
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。$R\ R(V*NC0V Y
$timestamp = time();上面的完整代码：bQ$Jv5m4TpB
<?phpP#_,Z1it5W#|]H e&A
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username0aG\2iIEV;O@
$db_pass = "password"; //your mysql database password if any kF|V)m*T-S"P#\
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limitTZ[z0i~v
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed'oiwe T3o
$timeout = $timestamp-$timeoutseconds;S(_D*Z*d2]0x
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接^4x v5A#i4UovX
mysql_connect($server, $db_user);查询数据库的代码： xhd%W/V(iJpt
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。#E god*S2G4g
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESX H JDBL'c
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");fK Se&`H)U
如果用户用错误信息的话，这样处理。
if(!($insert)) {|6K4EaX#^;R"t)h
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。:DO.{(m"~}_RTsa9w
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。L,k(Q:zZ] E}
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用&p9pNJ.jr;|
mysql_num_rows(query);来统计用户，代码如下。&Bef Z2F{7P-~6vH#`
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。l2`\ Z;e{!V+n
if($user == 1) {l!y@Y+cgoS
print("1 user online\n");
} else {
print("$user users online\n");6tDrh9\(Pn
}最终把上面代码写成一个PHP文件如下。&XL Yd$WMBLu
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username!mx c R(U `Sb
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are o1tPZX(jCg1v
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last9n4o{_-c-S@&H
// $timeoutseconds seconds)
//this is where PHP gets the time$`+p:v]'d+D3Ep
$timestamp = time();)C[xv)M
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;-aAOdE#X.X
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listq7d@+ypS-rYd
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");'[5q,bKL${
if(!($insert)) {Q/V.z9_Ko
print "Useronline Insert Failed > ";
}kq%p jP!fh
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.GI8Z nx:Sf%w%V@
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {]w Q J){)G@ F
print "Useronline Delete Failed > ";
}['W[?rB+c8Vc
//select the amount of people online, all uniques, which are online on THIS pagea-Al V1SLD]
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online5w"f!b,qCG7SXDP
$user = mysql_num_rows($result);J6sj7vz5P G$GS
//spit out the resultsr)~-v+Y1dv;I$q
mysql_close();
if($user == 1) {l:Z[-\t`GX9N;S&H
print("1 user online\n");
} else {
print("$user users online\n");|/~)j.w*HPN
}]h]P'i }
?>m(H3dd:z$p
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以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。4b+p*sS-V6g4`Sy9_
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。 wZ2HPt!V
当然啦，这两款主机也是相当不错的。A:mt8qTG
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年2{d1j}f*D4Q
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url] Zw$}J ^x}]
空间专线： 0756-2623871 QQ：168075865，好象还有全球免费网络电话:全球免费咨询电话 [url=http://www.now.cn/callcenter/call.net?LineName=55]http://www.now.cn/callcenter/call.net?LineName=55[/url]
自己加QQ去问吧。

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刚用PHP写了一个网站在线人数的程序，请大家进来指点下！