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 (dm#U3sE*U8b0W8_e
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (F@{N)nwkm
timestamp int(15) DEFAULT '0' NOT NULL,(}Z ]3Z1V
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),V+jKB!A'HEU6JG
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。\&\ o+e!}3Iw
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名3C-F0le,gG+I
$db_pass = "password"; //你的mysql的密码E:mk-\9aa
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)*E2kr5W*rt
$timeoutseconds = 300;取当前时间。SpV#q$~n!J%Js-A
$timestamp = time();上面的完整代码：%T#`9J h/`2`d#y+R
<?php-R-v v-z QZR'YI;MK
$server = "localhost"; //your server8`J,|[ T(z
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyDJ-ig-W:V+G
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();{pF!k6L
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接S%M*R @[@6u'o
mysql_connect($server, $db_user);查询数据库的代码：5Qt;]H8yr)H
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']."','".$_SERVER['PHP_SELF']."')");9L)K2u [!a4~xk"lo
如果用户用错误信息的话，这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。1i5A'j$^0h/T
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。FJ$J z&XV4\
if(!($delete)) {
print "Useronline Delete Failed > ";mHtR`9q/O dN
}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。#ra4^ ?&K#[w@
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");P:g%x-C.m3\0ZU
}最终把上面代码写成一个PHP文件如下。
<?php%ct'@4VJF
//Put your basic server info herehB+H1c8JL
$server = "localhost"; //normally localhost&bq9XR zlu9g
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password&}a&j GnV
$database = "users";+U!^%bI ^U#o
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areb,d9f[]Z N/J"Z
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last5sM%m"J"Kf7~,d
// $timeoutseconds seconds)3[2W^ Z:ebr2~q9`5@#A
//this is where PHP gets the time&rKo9F:d
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedt/ZYt%]HB6s;s{Y
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listl@9]4k#STW
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {BO O0i#A @i|D%BW
print "Useronline Insert Failed > ";;M/|x+fE@
}9amngRj
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");*{^R_#T9?H.fYH
if(!($delete)) {nl-q?;y$i7]
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS pagesNR)fl,s0_:w'A*Cj f
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > "; KL4rz@
}B)ER"A [ v5@7Q;b9TWc
//Count the number of rows = the number of people online2j1P^Y8epGZ
$user = mysql_num_rows($result);x|5OS%iA!d
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {kc$}!`2@
print("$user users online\n");
}
?>ib Fw q
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url] vH_O[
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。w*k:N n/G;Z3p
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。#N;ZU cLT%W;tm2m`/U
当然啦，这两款主机也是相当不错的。qfn6l%ZGQ
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2`0mP _-u\
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] O2`et k!}r'E
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]Le aZMD7NA3H6L'^
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！