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！
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。\ TeCnq%t
首先我创建MYSQL数据库表。
CREATE TABLE tablename ({6g4w)h5N8L
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,o W:gHnx
file varchar(100) NOT NULL,du)A+JX`"{J1U/Y-L
PRIMARY KEY (timestamp),jdo#Jf!Kpz/v
KEY ip (ip),
KEY file (file).w(Q d-pv*Q
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器`!P} Ce`Gn2L`
$db_user = "root"; //你的mysql的用户名)LrLs:G9^
$db_pass = "password"; //你的mysql的密码
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)b@J~V
$timeoutseconds = 300;取当前时间。Whe Uh,TH5LJ
$timestamp = time();上面的完整代码：E,D1iD1a%sN7m}F0N
<?php:^LK!~"]v:y"b_
$server = "localhost"; //your serverE{-^h5Dk
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any MsS(e"r`ca2c"qT
$database = "users"; //the db namep7[&_/S-FbG
$timeoutseconds = 300;//timeoutseconds limit
//get the current time vN2g.C2Mo4rm
$timestamp = time();U8zL*\(]8u~
//calculate the lowest timestamp allowedMnN.K5_4yR'I1^
$timeout = $timestamp-$timeoutseconds; D0d o3j/H6xxe M
?>连接mysql)V]6lsE Yw6O
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($server, $db_user);查询数据库的代码：
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES.y _0a DB*Rl^ a
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");2my$Nw/N1p
如果用户用错误信息的话，这样处理。Wln SCj#B-u
if(!($insert)) {!qi1tfq{]k
print "Useronline Insert Failed > ";Lq-OJ yq$[2^Y
}然后实现当超过设置的时间就删除该用户记录。{rv,n/Ddt[
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题0Y(X"z/Vg%r;t
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用G"J`[%A"K
mysql_num_rows(query);来统计用户，代码如下。4U(@ e'U8ee9E
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {Cw XZ"Ve
print("1 user online\n");:vN}yJuB;ja~W
} else {
print("$user users online\n"); S1hESk
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here+o ~\}L IN
$server = "localhost"; //normally localhost$["o qHUGRge
$db_user = "root"; //your MySQL database username6wBH#r.sY$s
$db_pass = "password"; //your MySQL database passwordCW0OcFK
$database = "users";w;k:L'`4\3iW%Dq X
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last*yFG3o8G
// $timeoutseconds seconds)wd*sv-Dh)z
//this is where PHP gets the timez,E9zN/E cyf1^$X S
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed#B-ae)C*N6}%l|
$timeout = $timestamp-$timeoutseconds;d4GiAB6l,r
//connect to database,T-o.A&Z-pz ^-lJ
mysql_connect($server, $db_user);&HPb6c8}#[
//add the timestamp from the user to the online list(^6NFkNoABXi
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {:snI#K6T+VN MB]
print "Useronline Insert Failed > ";EKA,oZiT&C])p+N No
}%[8x;dqo'V.W6p'P!JY
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";7p-t(fF&_9@ G6M"Z}+R}
}
//select the amount of people online, all uniques, which are online on THIS page
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");K:H5Fr] w9Y
if(!($result)) {f9M0v;Y ~C _"o+e-^z`
print "Useronline Select Error > ";-y&mA2x:Y&m0L%g
}%Q2^!g `,ZL&bx
//Count the number of rows = the number of people online+Q {$|0}Y(M5];X.m
$user = mysql_num_rows($result);@NG*fF9\
//spit out the results&iu5r)y6pbE
mysql_close();v"K K%slX-i*V
if($user == 1) {@T1o'kT n(k k$a
print("1 user online\n");$Ox E h!VgFB8t
} else {
print("$user users online\n");7xf!DOx6k+nQ
}
?>
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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。
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。
当然啦，这两款主机也是相当不错的。0qJSS3j.uZ9g!w&m
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9qS Wf7f U6v:h
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
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] WauOgC,|
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！