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。;y9cDqHl7u2C%y
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL8l3QI ^a lA
}可以使用的SQL语句。
CREATE TABLE useronline (J,~z7B n-j7wov _%@
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。 Xlt$D$K8g,w_
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名u;b6]ch,DUIs
$db_pass = "password"; //你的mysql的密码v3R&V,Z!D0bG
$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。
$timestamp = time();上面的完整代码：4J.M5rk C!}5c(T
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username;V/e}/WrT+D0g L
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db namea6\C J3kBH
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowedB.k;S Y6i/v9f#s
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。%VW0vpWL^k ]
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
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); M]W c W^
如果用户用错误信息的话，这样处理。3g-h4vj-lg*BNR
if(!($insert)) {C5fO{|%?`;u
print "Useronline Insert Failed > ";&l0ns4?t6a
}然后实现当超过设置的时间就删除该用户记录。N%lvV&dJ[f
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。#z_8_B g,m-Nw
if(!($delete)) { wI.~,@3`3F[
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='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。~"Oh;s$`nUA
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {9O*b@7}4yj-t
print("1 user online\n");$I,w&]PV1Z%@?tv
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password?O.M0w+M
$database = "users";
$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
// $timeoutseconds seconds)
//this is where PHP gets the time~9Zi9k6N2A
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to databaseWd P }5E*` A.DR
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");sP,D0](l6v+H q
if(!($insert)) {
print "Useronline Insert Failed > ";lY0i3f\,`B
}NkniMCi
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.a;C9HW3sKmfT
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");qv U ^}y
if(!($delete)) {
print "Useronline Delete Failed > ";
}
//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='".$_SERVER['PHP_SELF']."' ");.ZT1w$_{s
if(!($result)) {m k%E*bHN/Q)~
print "Useronline Select Error > ";
})I]DeQ'fg-y.]X
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();R |e'[}f`!n3n
if($user == 1) {
print("1 user online\n");+l;F:biG-H
} else {
print("$user users online\n");'m(J[1F4c/g9yc*_c
}UKyuKY
?>
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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。:Jj5\ ]kn
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。B(z t[8}l3@
当然啦，这两款主机也是相当不错的。XM:O4NQY"AZIo
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
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] /j#MP)T3g0^:b9c
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！