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。5htP+JI#\x/M-p
首先我创建MYSQL数据库表。}_/NDK4d!yjD ^u8r
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。&U~$^zfiI%I%i:q
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,-}/Z1a]PsH
ip varchar(40) NOT NULL,W3iYtJ|LE
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),7QPB-e2G)_^`
KEY ip (ip),J:|5y `Dk
KEY file (file)(c,EEp |
);下面我们是PHP脚本，首先我定义MYSQL的信息。(M+c|rz#Wi{
$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6P/Y;g4YX@
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。c*M n;C*a?$P
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your serverR)vG K!woU/n Qt?
$db_user = "root"; //your mysql database username7DQ$?Ms
$db_pass = "password"; //your mysql database password if anyk9D:m5pWl
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limitx4cu!V-~:r6J0M~%H
//get the current timeDO%P I#x4iT#N.K
$timestamp = time();
//calculate the lowest timestamp allowednna'[z!|'bH
$timeout = $timestamp-$timeoutseconds;PFr x~B
?>连接mysql2c]KJ;_r(q
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接,X@nh4Y
mysql_connect($server, $db_user);查询数据库的代码：2x4e8e].G_Q _
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']."','".$_SERVER['PHP_SELF']."')");EOe&~ ~1Z
如果用户用错误信息的话，这样处理。f"OfZQ
if(!($insert)) {:Gt/b{/@;W
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。s3BC9WrCe+n%]
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {0eYS KK(UZC%dv
print "Useronline Delete Failed > ";nmy`k)P#h xj
}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='".$_SERVER['PHP_SELF']."' ");使用a!v)h l[ ?8QC8b$u
mysql_num_rows(query);来统计用户，代码如下。-g.o8},d6YH
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {,lDNAQ,ltp
print("1 user online\n");
} else {
print("$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.t3q1Jha5^
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordTmF3gn$TsR
$database = "users";@)E(]v0sA5JHM
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last$Qz8dZ5`s&XN
// $timeoutseconds seconds)9C%Ge\ N;y;M
//this is where PHP gets the time(T]E Rx(o?
$timestamp = time(); V"t l/z0B*cZU
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);vh1F6c9[l
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES+j,m7Q~t%?
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) { _+~i&iA4d ?
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.k yg;yc+\;c-]
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); U~4APPe#B
if(!($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='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {^$|zC B;Goq(qK
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);a?U0V/Uct W3J;x.M+n
//spit out the results?,` mg1{NZ
mysql_close();L#|O%|C_e D
if($user == 1) {
print("1 user online\n");
} else { tt*cmlx1t
print("$user users online\n");,c!l3YL)Qna
}$P&JW6`8Q0b9ljc
?>4M"{]OV[3l(?8L2d&b
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
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。2qG*u;zX };FVk:O
当然啦，这两款主机也是相当不错的。
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] \,B b;H ]3W`nR
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] h*P'f5od-I
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！