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 (
field type(max_length) DEFAULT 'default_value' (NOT) NULL@rk?sK*EOH
}可以使用的SQL语句。^F1I&k8mUv
CREATE TABLE useronline (Duc)| XT5q?3W
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,-tA+D\FYH uH
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。K9GCw3~
$server = "localhost"; //你的服务器.H\BWE'}
$db_user = "root"; //你的mysql的用户名F/JfT~W+sgk]
$db_pass = "password"; //你的mysql的密码O{ |2Zm:t$]K$ue
$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。+sH"mC;~m+aa/}6q`
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server7u"{~+_ef3Eb0U
$db_user = "root"; //your mysql database usernamez'I BT]n
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name \*ZAW~o:Kpuc J
$timeoutseconds = 300;//timeoutseconds limitG^pmrRL
//get the current timeY2`!t;`pI%C%]C K
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;ll?.{6?DF
?>连接mysql4IF1|1Tj'u
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：K!ac(b^:K(g
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。3l:p2L:pa8@0?(qI9?s^
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES+r%b~4P8m-s^:J\&j^
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); I5q/td:e7S%r
如果用户用错误信息的话，这样处理。H-~4X3}/U
if(!($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<$timeout");同样给出删除记录出错的处理。d8U Nfri)K
if(!($delete)) {"^7[8th!?
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题rF,wZ,M|\"@
$result = mysql_db_query($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。D(T@di6B
$user = mysql_num_rows($result);最后关闭数据库。%Kr XZ7G$i3t!l$[
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {-Y6V dATg)S
print("$user users online\n");8K DIx!F y$J
}最终把上面代码写成一个PHP文件如下。mf F'R SS.v F
<?php
//Put your basic server info herePN2~%^8rW+~
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$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 lastY Z!K`"|2I9E
// $timeoutseconds seconds)~p)QydN%A:\z
//this is where PHP gets the timec:Ed3jCt?c
$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 databaseN.ZjE/q(~)J-J
mysql_connect($server, $db_user);;Jb%jP9ty!An
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES8KZ$q?#G-j8iGV
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";w`&t$uPCJ;b%w9[!n,t
}![%{d6|ay Evnuv
//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)) { X&pu0Kl+~h6XF*@2J
print "Useronline Delete Failed > ";r"nt#j9PcS7|$w/U
}6Fy#FR#Tnx/t}
//select the amount of people online, all uniques, which are online on THIS pageIhv0_\
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");SVS8Zg'q#m
if(!($result)) {
print "Useronline Select Error > ";^g0i^7OS-\6J
}-Y7D)J}x/P T
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);$A5x7|'F7F5g+H$c
//spit out the results7t pE]jOd)V(XCU
mysql_close();!L3\2xI.} s3cV+GyI
if($user == 1) {2q]Q)_Rz `
print("1 user online\n");
} else {k0l x-Q$w6`$`5E9[6Do
print("$user users online\n");
}
?>O QGo}Y\.@|$U
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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。.C"rC3IG(` j0_H:H
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。dze/f,H@WtA
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q!S.DW?c m@J
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]
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！