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！w~wLQo2I.K
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。 N }J(e.a1y
首先我创建MYSQL数据库表。
CREATE TABLE tablename (#]d4Z&noPw
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (7Gpd y6N5f9d4Wo
timestamp int(15) DEFAULT '0' NOT NULL,_#fX&Jm@8l
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),C"ofk,I.F
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。o4^)va(Jd;r
$server = "localhost"; //你的服务器#y/|#e4~+V_%t|k
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码JO IS[
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)Ye@tr
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?phpU T;}F7p'b
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username'H3R!^)I O@
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limitp^2\.[R;dJ
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;kw&jI6m#]2t+Yk%Cd
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。*^{(c4V$tK
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接]V?rr
mysql_connect($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。s\/xTUe2V0p
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES0A/v_Yg2SsD
('$timestamp','".$_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 > ";0G.bfe0k;H
}然后实现当超过设置的时间就删除该用户记录。5L(`#},FnYJ
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。V U3fP9OwR?
if(!($delete)) {
print "Useronline Delete Failed > ";
}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。
if($user == 1) { w2z|IObJQ&e9z
print("1 user online\n");
} else {
print("$user users online\n");%pl X8x4a ]tn%Mn
}最终把上面代码写成一个PHP文件如下。
<?php~'qP}t7P
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernamef%Y{+\rK3e/ZL5i7S
$db_pass = "password"; //your MySQL database password9KF2E^;OT+{4mul2a
$database = "users";%f5EESKv/Gd3q
$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)'};LG@JiQJ
//this is where PHP gets the time
$timestamp = time();8PLrL8eh:c'[
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed*_$N5k1avgV
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);QF{;n:KPI
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {-S)Dd VBf6UK1CJ
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.ju0bJ:j D"Wy
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");1Ma6] O;Xy
if(!($delete)) {mVa!p:FLL
print "Useronline Delete Failed > ";
}
//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='".$_SERVER['PHP_SELF']."' ");]R8R&nR)F\v
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {4J]%N#])v6b
print("1 user online\n");p$xCA*e;lX
} else {'Cn:v8]C
print("$user users online\n"); g'PH}_RzH(DT
}DK'_ ]b5E
?>6u~GwCHu
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]E U1d(B6r?
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。T {$XG)s VR vk@-E(^ V
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。lV/Zi"^9k
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
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！