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！Z G[B;p?5E/a
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。oV4J8La
首先我创建MYSQL数据库表。
CREATE TABLE tablename (Cc]'xMQ#dy0?
field type(max_length) DEFAULT 'default_value' (NOT) NULL"w/bl] K[S1oY|
}可以使用的SQL语句。8SrVmNuB
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,|N1h/{.N _
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。
$server = "localhost"; //你的服务器3r Rt$R A*J4l Z
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码
$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：
<?php
$server = "localhost"; //your servero M6bUH s:a1M}#v/b'f
$db_user = "root"; //your mysql database username,Rw bo3tTM(m/U
$db_pass = "password"; //your mysql database password if any2{ K R!W/W1\h"_
$database = "users"; //the db name1x2VQHbR
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time(); t\1}-h },N
//calculate the lowest timestamp allowednu)[ Tm2l'};b ~
$timeout = $timestamp-$timeoutseconds;
?>连接mysqliJhK3x
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。J.ZM0h!Fk]ex
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES2_mhVR+I/Tvb
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。%IL8H-tO)egzu
if(!($insert)) {u8v Q8C-e pf W
print "Useronline Insert Failed > ";(~1b9c)r9W$v-jqfZ
}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<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {]c}Rc)J#vA
print "Useronline Delete Failed > "; ?E'o&Gg1i:eL5Y5rXy
}下面我们解决数据库中不同IP的问题2kG~#Ei!D9}
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用#@iU1UF.OA
mysql_num_rows(query);来统计用户，代码如下。1}2Y2}.V3?2n
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。WU4t/@S.j5CTB`
if($user == 1) {w2h&T*I+tVP
print("1 user online\n");Ot%I.fS0pk|
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?phpw;?@ N(I!{G4bl1b
//Put your basic server info here
$server = "localhost"; //normally localhost Oa}'`8B(shC
$db_user = "root"; //your MySQL database username#QIp,HhP
$db_pass = "password"; //your MySQL database passwordO9T'n'[@
$database = "users";h0WB q7sr
$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);pN's+GWs'p&Jc(i
//this is where PHP gets the time8g5O+[E)Z3l&LB+tn
$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 database
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']."','".$_SERVER['PHP_SELF']."')");)E2^~z!f-c'^*b\
if(!($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<$timeout");
if(!($delete)) {Z)YffW^
print "Useronline Delete Failed > ";_ej}&T5e#BqJQ4fp
} v^rUc g!FD&SE
//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='".$_SERVER['PHP_SELF']."' ");&ig bo.}h/[&~PG
if(!($result)) {
print "Useronline Select Error > ";
}*j5nL7~LN,@
//Count the number of rows = the number of people onlineZS9^ ^8u
$user = mysql_num_rows($result);!K4Y4ZtlS
//spit out the resultsYK9GW}.S
mysql_close();+^-SEq#Zc!JmkN{
if($user == 1) {4xE,nn]p3r
print("1 user online\n");
} else {
print("$user users online\n");0^;o8JN!R`7U
}9^n$g2HS {_
?>
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]/U!~Oy%K GT|mL
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。
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u*K%b)C%H
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]
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]zw y r9j!W @
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！