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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!
tif%w%rx#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。
3l!LSCX [qGl9yv 首先我创建MYSQL数据库表。
z/g$SWKL CREATE TABLE tablename (
0Gy)V$O YH](cZ field type(max_length) DEFAULT 'default_value' (NOT) NULL
+gE f\ i0eU }可以使用的SQL语句。
@}&AG e9G CREATE TABLE useronline (
Om3B],s%CM cz.[4L timestamp int(15) DEFAULT '0' NOT NULL,&x!K+[}/_I Q x*jR
ip varchar(40) NOT NULL,
z)WV]6B v file varchar(100) NOT NULL,+@;k|#x4o(O-p
PRIMARY KEY (timestamp),2D7yl rO,R+`(b
KEY ip (ip),
BeH @8Rf;E KEY file (file)s-FB~R9@
);下面我们是PHP脚本,首先我定义MYSQL的信息。H{6s*kA'Q
$server = "localhost"; //你的服务器 }'v#VM1tv+m P
$db_user = "root"; //你的mysql的用户名&p ?4~ h hHSsQ
$db_pass = "password"; //你的mysql的密码Aiul"AP
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
Q*x7pH%j$V $timeoutseconds = 300;取当前时间。
"|`2Y3w]B7@ $timestamp = time();上面的完整代码:|:b:^)\C6x X
<?php
!f5~&E6R7Cj3\)Fn![ $server = "localhost"; //your server#T#Q,N`T m'C:v u
$db_user = "root"; //your mysql database username
5]_,_H1wn b4V5K%sw $db_pass = "password"; //your mysql database password if any9V8d@} A
$database = "users"; //the db name
#xS u?{U:l2x $timeoutseconds = 300;//timeoutseconds limit
T:c*j} g0ptA S //get the current time
-H1X4AV5|p D $timestamp = time();?#f o2{Ba.pO1K
//calculate the lowest timestamp allowed!j5Y$o-J+S A;p"n|V
$timeout = $timestamp-$timeoutseconds;?0k@9{B7W#L
?>连接mysqlhcc[CO)W/LR xb
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
2h5}0L8s[t mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
h WPj6J D#k mysql_connect($server, $db_user);查询数据库的代码:6J UnQ7zts
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。 I4G!A4BA}
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
V&UO$PQT)A8S-@L ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");7Qi-Qt Xd2q `y
如果用户用错误信息的话,这样处理。
:gmg [WE w_I&v if(!($insert)) {!q3aFI,d7B$K
print "Useronline Insert Failed > ";
9w A4fd*U }然后实现当超过设置的时间就删除该用户记录。
(Q(hNOMZE6j $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
eg[d]~3V(T if(!($delete)) {
Xr?Y U/Y.r Eh print "Useronline Delete Failed > ";
0jb$J+f7i i M }下面我们解决数据库中不同IP的问题
j [1c [ ^ W+K $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
jr1YF Z1Uv3r$k mysql_num_rows(query);来统计用户,代码如下。
]r3l m~n $user = mysql_num_rows($result);最后关闭数据库。ii$Q6q G;hWH
mysql_close();显示在线的人数。#o5gZccw
if($user == 1) {"{:lxi%F-Rs(cN
print("1 user online\n");
8PY]rn3}0AZ[/n } else {
S({C{qa uJK print("$user users online\n");VB,I,V;c!g1J
}最终把上面代码写成一个PHP文件如下。
g&g"fW2y <?phpP{,ub` dx:GC%oK
//Put your basic server info here
$u&| W`$HOe $server = "localhost"; //normally localhost
f7l!?qQp @&N7v:MR $db_user = "root"; //your MySQL database username
1czCls1b;~$M5^z $db_pass = "password"; //your MySQL database password
)?[rhx $database = "users";
(K5I%v's M"M V $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
?O2P(x0[W%[ // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastN^ _ ]%t+f
// $timeoutseconds seconds)
lg9@ Kt q~-n o0i~,N //this is where PHP gets the time#G]1]9t4Zi
$timestamp = time();:{ ~ V)X:I r,Y7} b
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
/N-PAUku&M $timeout = $timestamp-$timeoutseconds;+mfjS){e
//connect to database
d;x*K)r6K i5rY C$_ mysql_connect($server, $db_user);$j#H_V w7X:q
//add the timestamp from the user to the online list"S5Wg,AcT)I)o-T
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES @-Q:d J.rV9N@D*L
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");;GioG,`;c+M
if(!($insert)) {
'X{'RzI print "Useronline Insert Failed > ";
/|e)x n Wy*t| }
+n%iLMS7W //delete the peoples which haven't been online/active in the last $timeoutseconds seconds./m{J/V x0K
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
:My"u!n+h*fF#` K if(!($delete)) {}r$@U|&Tc:q0DY
print "Useronline Delete Failed > ";mcu"Pf,\"J:Hno
}
e&OO3Q+t.CV9~(h|#^ //select the amount of people online, all uniques, which are online on THIS page
_%p8Bj5S k"M1\j $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");?2r/i] O:h-} P
if(!($result)) { W4X7WB1G h:M
print "Useronline Select Error > ";
;zbE#hzY0qpoT } m9m7f3KV"uT
//Count the number of rows = the number of people online
*j}o+S`*z:R#y $user = mysql_num_rows($result);
"~N'vV']Q U*q$^ //spit out the results
HLXVS8}"@.P mysql_close();
_ cLa6T*U;Tyho if($user == 1) {
z)N4J`H.[ print("1 user online\n");+t~:T}a
} else {G+w?G7Oqrb*]
print("$user users online\n");)L(TYmO)m2v B _~
}
b~ QEPDi#JDh ?>2u['AD#h$M0R-}
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]%E1n(p*Yowt
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。8ed j}&G7f4C
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。
/@ hLS+]YJ@~%C 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。$f)~+\[!n,G.b!}
当然啦,这两款主机也是相当不错的。
(xB1D;s0^ 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M#} Je _oj$M'gb
标准商务B型:Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年
O,f t$U{;g 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]
?2fmE^4L 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]
2t1f7durl r%y,F 自己加QQ去问吧。

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