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。F$r1R9OHCea
首先我创建MYSQL数据库表。d g2e)\z.?:?*Pv
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL1U flM+zn
}可以使用的SQL语句。EB4oI0\h2A/]
CREATE TABLE useronline (-qN0Y(_ v
timestamp int(15) DEFAULT '0' NOT NULL,'kI(TrZp5` J/V
ip varchar(40) NOT NULL, m&{j QH2f.I"th
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)!a4TA(Dqr E
);下面我们是PHP脚本，首先我定义MYSQL的信息。QF.[tQ5f N?
$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m,q#WK8iA
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)9Q7T{.^%q/|,G!j-~W
$timeoutseconds = 300;取当前时间。 f4N {){n
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any.eJP5edg!jd
$database = "users"; //the db name.q:A9]j'Q7R_Oon\+j
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed0\(e,Jk*J#x D;tFK
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。3u5W;i4C#?%bb*l
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接buC`v5X"H
mysql_connect($server, $db_user);查询数据库的代码：,uM^ml1h/R
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']."','".$_SERVER['PHP_SELF']."')");8_dZ8h X*V3h9f+e
如果用户用错误信息的话，这样处理。zeql#`p Z
if(!($insert)) {
print "Useronline Insert Failed > ";^a#yQk~;Ey
}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<$timeout");同样给出删除记录出错的处理。B3bOW|6WX@E {#N5}
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题"Bnd8I9m*ye&c
$result = mysql_db_query($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。 B4c[U8K
mysql_close();显示在线的人数。e[[ iO/t
if($user == 1) {
print("1 user online\n");:{*_zos&GH
} else {CpSU"x L9Y
print("$user users online\n");9FK6cvw(vF
}最终把上面代码写成一个PHP文件如下。
<?phpbJ hUo5iQ;e9[#\
//Put your basic server info here5K+M$F%C:K]R~Ji x
$server = "localhost"; //normally localhost E K-o/r-pTNg} }&z
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password^DR.c:J@1w/sTM8n'y
$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 lastd"k ?"B~Y x
// $timeoutseconds seconds)
//this is where PHP gets the time H7w2cp%o+q1K7L _:X
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed+E1LI.Y Am
$timeout = $timestamp-$timeoutseconds;f*G6eci
//connect to database
mysql_connect($server, $db_user); Uuqhap
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";%g:};ZTa6JQ
}Z Wv"A{f%O
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");t0jp'FgI|0IR
if(!($delete)) {,f&E(F+ah)da.CR
print "Useronline Delete Failed > ";6IZ~Epr
}(}gB M2ZcL
//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)) {
print "Useronline Select Error > ";1SJ3q1{]$xBb}
}
//Count the number of rows = the number of people online2|,~q,k9nNq\4pG
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");[ D8q(a:pu H%o
} else {
print("$user users online\n");
}So#S$u+PgJ
?> `7m t7lL]j
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]v!A1W5g X%R
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。5L#|E!|E^v|
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。0ki6JYG
当然啦，这两款主机也是相当不错的。 U4oR*\&_"}&d[:NA
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年9{s5LV4t,W
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url] .m$sg!Ma@
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！