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。
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLCk,JY#L8hg9Z
}可以使用的SQL语句。
CREATE TABLE useronline (s'v*{:]+@
timestamp int(15) DEFAULT '0' NOT NULL,3YG `j'l'e8o6cy;M0e
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),([3pNu)nW _1G:r
KEY ip (ip),~b|[x [
KEY file (file)ZmpQ1f/Cqw
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码${K9|'v.{P8d
$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。Ww}Ky"z1]T^
$timestamp = time();上面的完整代码：jE&x7|e KA
<?phpZOiw\4J
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username g z)J7p)tgW`3s6A
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit-}v,w}au!O&C5W
//get the current timeoWHAv!g6~
$timestamp = time();
//calculate the lowest timestamp allowed.G:vJI~QT+k
$timeout = $timestamp-$timeoutseconds;dFlw UZ{!u$g
?>连接mysqla;wNo ^XN
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($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：*dKaH Dm+\{8Q
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。3D4s2T-p^
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES%d-d"R gWNd&c3V)wg
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。l:PR8mBBQw
if(!($insert)) {
print "Useronline Insert Failed > ";p9W]#b\_,^)W(g
}然后实现当超过设置的时间就删除该用户记录。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。!WpC#OK#Q/r0}5~
if(!($delete)) {
print "Useronline Delete Failed > ";GW!AuM%^ O[]
}下面我们解决数据库中不同IP的问题-j^]0kA(OL
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。
$user = mysql_num_rows($result);最后关闭数据库。lg-J9rog.@
mysql_close();显示在线的人数。x.?.q3FyMS7}[
if($user == 1) {
print("1 user online\n");LdzZ/^RUZ
} else {&F)G[)j?1UIY2o.s4y
print("$user users online\n");b7ZtI0sG
}最终把上面代码写成一个PHP文件如下。+d:EG i(m4S&Zu
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost(@z,`(eZ-s
$db_user = "root"; //your MySQL database usernameY[H#bjx(I
$db_pass = "password"; //your MySQL database password
$database = "users"; T+d `5Q,Oz~ r-b
$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"c9C;K;u Q0E g }
// $timeoutseconds seconds)S3wDLq
//this is where PHP gets the time0M-WoF1`~
$timestamp = time();$h2m5}7N\G?9}!x
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedF:D;Yx?(o!CC
$timeout = $timestamp-$timeoutseconds;9SUvgLY
//connect to database
mysql_connect($server, $db_user);)Yl7G2HF/Y
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES@A\/n9TF1EF*k+w
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {b#HL#X9S(~_:Y
print "Useronline Insert Failed > ";4XPArH ~ok
}jev g7Q
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");7~%ov6bh
if(!($delete)) {
print "Useronline Delete Failed > ";.A%F3v:m e)@2E ]
}
//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='".$_SERVER['PHP_SELF']."' ");bx"C Ox/kZM3L
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people onlineeR F a;Kg&k)i
$user = mysql_num_rows($result);
//spit out the results ue"_Z6x3Rg:H#~
mysql_close();
if($user == 1) { V2r4O2fu5bL
print("1 user online\n");
} else {
print("$user users online\n");
}Z0t4MD1a"xtR9_
?>J;Z"wB&I&^ ?
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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。f n8y J$?
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。YOVp$d$b#W9B g
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。^!Z]K-re/R"Jc)_
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5ltaQ;kK:~]Q
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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！