捌玖网络工作室 » 电脑软件 » 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

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！'G/F4^nH+pv'C7}Q b
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。
R^xu |"_ 首先我创建MYSQL数据库表。sc:a^Kp
CREATE TABLE tablename (NP XMd8W
field type(max_length) DEFAULT 'default_value' (NOT) NULLYst*@%QVn&z
}可以使用的SQL语句。
:?|0qo:aj I CREATE TABLE useronline (
EB,^wM^|3[s*Y timestamp int(15) DEFAULT '0' NOT NULL,
})^TWB~ ip varchar(40) NOT NULL,2H$snB%I+ub$XF9Z
file varchar(100) NOT NULL,hOb.V/GU
PRIMARY KEY (timestamp),K'dQGkv.uQ#p
KEY ip (ip),7ZU"A{;M O(\
KEY file (file)
VQ#o*KQ );下面我们是PHP脚本，首先我定义MYSQL的信息。
7Q-Ty+e9^I $server = "localhost"; //你的服务器
6AG'c en#qW!}` $db_user = "root"; //你的mysql的用户名
6WZ3BX*X'wDlBRJ $db_pass = "password"; //你的mysql的密码%J;R4G:N.HHpT
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数).MQ2W*D#H m
J
$timeoutseconds = 300;取当前时间。
)rP9D#x\]BL"G(L` $timestamp = time();上面的完整代码：ylXTso [3l
<?php
qi[:KH $server = "localhost"; //your server
k-VO]5yO&oBr $db_user = "root"; //your mysql database username
2{-q z.w8}lk KS I"hn+V $db_pass = "password"; //your mysql database password if any
.W7DLK1T!t h2U;A $database = "users"; //the db name
G)tU8D%t K(Z $timeoutseconds = 300;//timeoutseconds limit
BD7S$D%M1b.@~4M*HxI,c //get the current time
'lQVa!UV(aL $timestamp = time();
_v"Rt6W7os*f //calculate the lowest timestamp allowed,K Fm|#QF {
$timeout = $timestamp-$timeoutseconds;`&K9AqgmXGbP)K,Q
?>连接mysql;b,yebK'b0X
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
8B4foc0dS mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接g9i3Q+w|e&@
mysql_connect($server, $db_user);查询数据库的代码：
+Dj5Vw[A2L mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
c3ufi:X,H5|0maF $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
G6U9u0Z%d'z6yO#bR
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");2m,MUS.QPH
如果用户用错误信息的话，这样处理。j2Y%J(mR5u[9L
if(!($insert)) {d5Aceyf2zJ
print "Useronline Insert Failed > ";
wR3F6Wv
h-U(qgS }然后实现当超过设置的时间就删除该用户记录。Prj/e0L
z6t \,S
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。 ]Qp(@ s~'jE
if(!($delete)) {
qq4uR3tq print "Useronline Delete Failed > ";
-EpE
V'dp }下面我们解决数据库中不同IP的问题
-V gLFl$qO
?*m,C $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用$}j/A1G|#r"x
mysql_num_rows(query);来统计用户，代码如下。
x_W;J~Bgq $user = mysql_num_rows($result);最后关闭数据库。_'F(q;];GW#t8_
mysql_close();显示在线的人数。
y~R,YS2h if($user == 1) {#P4D7V Ew'j0B
print("1 user online\n");
E0zc\
o } else {
M#gJ6HYb$S print("$user users online\n");z^Md6O$u0S?_
}最终把上面代码写成一个PHP文件如下。
t*PV
Sdx0z <?phpM2T&dSx1G
t;t
//Put your basic server info here
e)j3W3ojyOz nY2b*D $server = "localhost"; //normally localhost ^?+Whr
?
$db_user = "root"; //your MySQL database username
*T&Ifw,L]Z!O a $db_pass = "password"; //your MySQL database password
AW3rK,pWr4} $database = "users";
7j?4sUJy W\A4? $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
#N[%CCBjlgo // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastl'DC1vh
// $timeoutseconds seconds)
2sH9M^u{I //this is where PHP gets the timeV0L{rjv5a}
$timestamp = time();
%p7Ytp'D`~ //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed]tV#~-E{f
$timeout = $timestamp-$timeoutseconds;S-e5Q8u7Yc{vi
//connect to database
*a }U+GOxm mysql_connect($server, $db_user);#m(bec
r#T
//add the timestamp from the user to the online listq9iVF1Sb:C#k*Cg0? a
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
6H'[#\G lT9i^Z ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");,Q0j&`]G$| V-i8m
if(!($insert)) {
|M$d7DH5o)m print "Useronline Insert Failed > ";
e1F8mDBh5KY }
iSB r4f.\
mW"R //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.Jj)w4?(tP
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
2X f!u,TJ.U1a!v if(!($delete)) {H$c;nu`%s
print "Useronline Delete Failed > ";
%JD7S B],o@*I }+CR'Gx Qm
//select the amount of people online, all uniques, which are online on THIS page
%O;^?JI#dGA*A-k $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
:rJ,tAqv.YL if(!($result)) {
v J9F%\&B,t&B print "Useronline Select Error > ";1L7Z&y0n @
}7~%czW} V@
//Count the number of rows = the number of people online~+G0F+]"G
$user = mysql_num_rows($result);
K,e:a-X7DlX //spit out the results2[%V.Nc1e1]*f&T*l~
mysql_close();
'P4G+p7Z!B if($user == 1) {
xiI*Q)x a5Mr print("1 user online\n");2s7`9O*A#T
} else {
ff+pk9^3j print("$user users online\n");-A|u u$}\
}1G7d[!t?,H$jz3fOb!_
?>
iC ~1t9xf6@:o [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
:?!pQM3V3i l@W 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。y-CPW3kG4v d
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。}
E(W1o+M8s
~4~k
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。

D&c&K7N8E 当然啦，这两款主机也是相当不错的。:UL:Lr1AD;b)e)K
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
C2kS`,pZPuD#[2F 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 Pb[`!^d
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]
cmT)AT:}:t/J 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]2Xr#mS(q2T9e+V
自己加QQ去问吧。

查看完整版本: 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！