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。 mg9EmjaV
首先我创建MYSQL数据库表。,v,De5sw6pi.i
CREATE TABLE tablename ( XzqH[
field type(max_length) DEFAULT 'default_value' (NOT) NULL+o5U'~CvQ&r
}可以使用的SQL语句。Uv+b5X|eGP
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,)M[nBYf:C0G
ip varchar(40) NOT NULL,9P2AOl-P
file varchar(100) NOT NULL,;Lp @4Y#D3KM4I~
PRIMARY KEY (timestamp),)mh$V#T"s[qT
KEY ip (ip),J2v0u R{U b+^)r7V
KEY file (file)e:a'[N6s5O^$Z7k)]
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器U&Z] ?%cb+K
$db_user = "root"; //你的mysql的用户名.O&CS@%vW
$db_pass = "password"; //你的mysql的密码B8_(U2kG+e&]*oE
$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：
<?phpBN:gC*eZD
$server = "localhost"; //your server*Q}s#p$_:L
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql,@KJ#w u"Qh
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。-L]\iYE~
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。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESqMD7k7g/I?
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。-C~ T;R&|Fa
if(!($insert)) {}"_5XA,xy ~4i3f
print "Useronline Insert Failed > ";
}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<$timeout");同样给出删除记录出错的处理。8i5A:pwP"b]Y
if(!($delete)) {
print "Useronline Delete Failed > ";:T9b:uj8]3?;e?$c
}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。
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。\(w2m&CD/]*T
if($user == 1) {
print("1 user online\n");2@/fNa*L\Y }
} else {
print("$user users online\n");DF!X0Tz NGIWcL
}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/QAx_0M0C8Jm7x8x
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordD~ j#A3F"Kq TH
$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)gN8h8Gk)Wlx|+a
//this is where PHP gets the timeV!J[6khnK
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedb v9p*Np
$timeout = $timestamp-$timeoutseconds;ryS)Q2f#t tzm
//connect to database
mysql_connect($server, $db_user);.Q&V9quB"P-EbX+X1\
//add the timestamp from the user to the online list7|n.h8C/KvM:?E6T7F
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");$Z&k9]l!M5v NF??
if(!($insert)) {!m|tB~] D9Bi
print "Useronline Insert Failed > ";(g+Ck0A"v
} ^ CaHp&c$H
//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");Vc;\]~UU8g2?
if(!($delete)) {v@JQ;o8N4Ab"L J
print "Useronline Delete Failed > ";hCM4ul)z@#^/@u
}
//select the amount of people online, all uniques, which are online on THIS page{Ly|vR8Kv
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");$A8vm_(vS
if(!($result)) {
print "Useronline Select Error > ";NO] i1IH]H
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();(`O!K%Nq*B^Q
if($user == 1) {
print("1 user online\n");
} else {^1HF/aX8Qa R(w
print("$user users online\n");:R:uVf,CD5U d
}
?>
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]"IU%F-x it4S&{8|
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。)F R`;x~Z5Q
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6SHkw}+@"DIy
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] *?[qVn,]f[h k`
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] Z;T&dRt,T/VSVd}
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！