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。:e9R({0a ApFz
CREATE TABLE tablename (9W%~P{f t$Z
field type(max_length) DEFAULT 'default_value' (NOT) NULL4q,H5? T II
}可以使用的SQL语句。4L_0c:@'}&~bB,~*z
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,t)ao8|p
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip), pKTqP D
KEY file (file)FVK5yF6N
);下面我们是PHP脚本，首先我定义MYSQL的信息。)U!i;F/s+O^2CS
$server = "localhost"; //你的服务器 f'i0u8T A,o
$db_user = "root"; //你的mysql的用户名z^%lI:Hi"PF
$db_pass = "password"; //你的mysql的密码${/q,c8Q!Z@Y
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。2f ]:x wo$Q.ws%r6`h_
$timestamp = time();上面的完整代码： \ s4J~e t/u}2On
<?phpx,h(D|9h3`6bQ
$server = "localhost"; //your server3T+@]|b
$db_user = "root"; //your mysql database username@-t&d \ oK&Y!p H
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name2Q"J{2f8Yz M
$timeoutseconds = 300;//timeoutseconds limit _ m(V/}&d@0d
//get the current timeo6r#@:h1?$d;~:{ {
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 Z Q!]F7rx9WX
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接)}(W^,@QF m.j8OcR#l
mysql_connect($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 VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");{N-qP#Ek*f-e~
如果用户用错误信息的话，这样处理。
if(!($insert)) {#V p&bJb
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)) {5@*nT _ P
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 T+L B*Y}p
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。g1kQ2s^4_#I8L.E
if($user == 1) {
print("1 user online\n");
} else {x)Q }p%Pk_/j
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info hereZ4fQI'T.r?Um
$server = "localhost"; //normally localhostAUA} }5xb7~}.s
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password(M8l"z,SO/Y5wp$r
$database = "users";Y4t*[P3Q
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably arefK1e$o r { UQs
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last)p y~(b(t ?Idk
// $timeoutseconds seconds)
//this is where PHP gets the time%mxX7?5w#^5@/y
$timestamp = time();O8rE+c!H/aa
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed;{ v'Q{%]xc n
$timeout = $timestamp-$timeoutseconds;"w+KH(@#iI
//connect to databasem0}/?I9X C]v;v
mysql_connect($server, $db_user); u.a9~$T R }z8?F
//add the timestamp from the user to the online listzy)CEl2`
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESj5F`$[G S"rQ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";\R&?!I&z
}"G$h/D5H? Z[ y
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.`z!O~:az9n t
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); Y%Y Y*K }1N4K
if(!($delete)) {
print "Useronline Delete Failed > "; MTN'P L9d
}6y;p]9WA X3S
//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='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {{ V3VMqg6m"A
print "Useronline Select Error > ";
}@:c0e(z)L$J
//Count the number of rows = the number of people onlinea!z'u/a2e#|
$user = mysql_num_rows($result);|V_ J MW7|5@.dh
//spit out the results5Fl"AI-r2y0Qm#V
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");t0\+P_&\3w({E I1|O
}
?>5QC'A x5aqw
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
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。X Iq u#D ~%Xa_.Y Z)I
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。N*@h8ER |.NN
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 t4c [ ~bs;t'o#j0l
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] FSE~:x,e:\(sS7u0h
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。
页:
[1]