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 ([w0Ky3t/K#^L
field type(max_length) DEFAULT 'default_value' (NOT) NULL W%kW2v7w,p,^O O
}可以使用的SQL语句。6uum;NO8L7vS
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,%X Q2D"z[&qb
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。9`0b.VVa
$server = "localhost"; //你的服务器t"N$n)E)wn5i{
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码C~cpd$Re,W#X
$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：
<?php8t:gNo^G
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username5x~;?3pqK~ s7E ]U?
$db_pass = "password"; //your mysql database password if any5c$Ri.tI%s;H
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();a(@&t:a$}ym
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;+c;Qf~o|vx*N
?>连接mysqlg4M @I9C4U Q(yej
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接Ng'k/X be_?%~t
mysql_connect($server, $db_user);查询数据库的代码：7^~$\0P6Yf
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 VALUESoQ+vI#?'y
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($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。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {0dBOY*]y+c s7KB
print "Useronline Delete Failed > ";VciV4M8j"z*v
}下面我们解决数据库中不同IP的问题|?X8{AK1G
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用5nNK?2~
mysql_num_rows(query);来统计用户，代码如下。4YA`4KDP5B5p
$user = mysql_num_rows($result);最后关闭数据库。-gXK` K*{&U
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");|&Sooo
} else {
print("$user users online\n"); x;y/k4W*@[ W
}最终把上面代码写成一个PHP文件如下。3b1k!gmz)\&[2f
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordn*`V3T*Pj(|%B
$database = "users";?x5F9Yp7^\'P
$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)'l3^*V(Z/R%G
//this is where PHP gets the time g\fttt#U
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed2H|CL9m(h0b:O
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);tNO4[,eV/BB
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES%fG(m%T$I^W
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {(q#O7A6n2P |%_
print "Useronline Insert Failed > ";
}%^d%`Wdm(O?W
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.;X4KW:D`m$xx;C%I9?o
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");%zl%W.Ic1f
if(!($delete)) {
print "Useronline Delete Failed > ";
}.jtU$G^
//select the amount of people online, all uniques, which are online on THIS page}S+cc D!o
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");!qK6DI8W
if(!($result)) {e!RP'I'\
print "Useronline Select Error > ";
}f%z4`+A?3j&[l
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);n|)bfy;~
//spit out the results
mysql_close();*d*DJ;Z*w,P
if($user == 1) {i:];EY.{Sna
print("1 user online\n");
} else {3@@-O*n1O$a0y2Ta
print("$user users online\n");/J3cD:[rQ*X1W7l
} s8RGEmn
?>nSd'Zq
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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。,O q,aJs r
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。1NEAY Z.CA(A
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。(AE+K3j6Z@
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] 6w7y9` r(@|
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！