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！3l8tMD @b+gm
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 (H0B\y7_,_K
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,ipr.S!U/s3t
ip varchar(40) NOT NULL,jm8_w;v,B(EKY9k$X
file varchar(100) NOT NULL,.|E*y;N6};p'`K"x
PRIMARY KEY (timestamp),mq8ha0[g"y7C,k
KEY ip (ip),
KEY file (file)y(K:U8]ob
);下面我们是PHP脚本，首先我定义MYSQL的信息。"j8rox0V
$server = "localhost"; //你的服务器` DUO;BN5|Y*{
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码q9FM6VEs.e
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)0e4{dwz-~7k
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username`,}Gnh#e.?)By
$db_pass = "password"; //your mysql database password if anyOKW4{[ pc%W
$database = "users"; //the db name;k`+m5X$Wj&k|o
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeV(tj!]D8n4E(w?4F
$timestamp = time();
//calculate the lowest timestamp alloweduqPP/Ux
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlXpe'y]b(jq
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。I(Y~ky
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");h"_5Wd([3S2r
如果用户用错误信息的话，这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";K.G]tr
}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<$timeout");同样给出删除记录出错的处理。DWN,U/rf2aoJO
if(!($delete)) {T7i~6u~4Y$zA
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题/Kmt2Hs~
$result = mysql_db_query($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。PW}DG'j"yJ
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。Kz:w7Y4X6_Y L
if($user == 1) {)q"b7@Y b j5r
print("1 user online\n");
} else {puQ/Ln.D
print("$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 hereNY&v3UCw&_]
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$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 timeb!z(b U:F(aX4n
$timestamp = time();~c9MO5K,gu
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;iJ$W5KMz1q}]'h
//connect to database#c-||)M9dn#?p
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESA GX6P%f[
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");Z-eiP%M
if(!($delete)) {
print "Useronline Delete Failed > ";1^8[aQh7`
}
//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='".$_SERVER['PHP_SELF']."' ");A6`3Q;Z%?3F
if(!($result)) {{jX[:m)D1Q
print "Useronline Select Error > ";
})j2\k0]L
//Count the number of rows = the number of people online8J;G0J/O^;m]2T
$user = mysql_num_rows($result);(}s+u7pC0y;Z0N
//spit out the results9u.qQ)w3Dk6n7D
mysql_close();m7}#T*T&eO U
if($user == 1) {Qk2rWU+m
print("1 user online\n");zKZw}|R'r!w
} else {rrx1j$NM"~
print("$user users online\n");
}
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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。y~c@@kR
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。;Q/MZ? j
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。P(cW"u a
当然啦，这两款主机也是相当不错的。N!H:iqJ9S%P
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] n3F#xEj+`
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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！