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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！

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Wu 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。#xO&Q4^-`
首先我创建MYSQL数据库表。s$lGTos7G,?
CREATE TABLE tablename (
7iv8FsX6w9_)K field type(max_length) DEFAULT 'default_value' (NOT) NULL&O)J)mP7D-O+b
}可以使用的SQL语句。
F eR@[[6zP CREATE TABLE useronline ( tyGj$i5Y
timestamp int(15) DEFAULT '0' NOT NULL,i.J&VE*~@8e5k
ip varchar(40) NOT NULL,W:h_,ki2x'T Ti
file varchar(100) NOT NULL,*`CMt Q6m
PRIMARY KEY (timestamp),
Q&K8j1o7Z,F KEY ip (ip),v y$WxK0bMH\
KEY file (file)nS_ h$\*^q&T
);下面我们是PHP脚本，首先我定义MYSQL的信息。
NZ`-H"dTn gw.m H $server = "localhost"; //你的服务器y,zg%n2nf!sL(]
$db_user = "root"; //你的mysql的用户名
$mFi+`:`&qDW $db_pass = "password"; //你的mysql的密码K5vv7uD:s q ]-`
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数);V6eH0M
f
$timeoutseconds = 300;取当前时间。m$Z"F)V[~+krc0s
$timestamp = time();上面的完整代码：/`dr2`Jdi
<?php{Y?2g6by
$server = "localhost"; //your serverzg0t`*oN&r
$db_user = "root"; //your mysql database usernamer%Q+m5~] C_
$db_pass = "password"; //your mysql database password if any3E`,w.lSmjq[
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$database = "users"; //the db name
-Q:@?jz&l $timeoutseconds = 300;//timeoutseconds limitF2Oi9V!X8D
//get the current timeW%{6S3aNn
$timestamp = time();
:l9_1YG'YI //calculate the lowest timestamp allowedEJ$a#a
Z x.{T;^,M(t
$timeout = $timestamp-$timeoutseconds;3qlV}l`
?>连接mysql IyNO@H%SN
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。AR&yO6Ah(a8H
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接8t(s0~c5t E a+U
mysql_connect($server, $db_user);查询数据库的代码：
;IE,~+K8o mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
p!Xj?5}#L $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
*qYr
e0J\ ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
,fe6]^2o+s*lZ"n 如果用户用错误信息的话，这样处理。 @c-wpcSN+H+Y
if(!($insert)) {3JXq|'a;u8X,o
print "Useronline Insert Failed > ";
vPY;s!`&z!K }然后实现当超过设置的时间就删除该用户记录。a(y a2k!E*} ip
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。%Ia!kU$q&M[
if(!($delete)) { o2W o8cK}`%I
print "Useronline Delete Failed > ";+E6aMvay
}下面我们解决数据库中不同IP的问题
j-^#Pj+c/H;[u $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
D7~?%tNRO mysql_num_rows(query);来统计用户，代码如下。
ExU`:~eF0T ` $user = mysql_num_rows($result);最后关闭数据库。cbHjD ji&?f T[
mysql_close();显示在线的人数。F^R#F)[:~g
if($user == 1) {,]Y.KL2sP
~
print("1 user online\n");
:jMr+y9A~,R } else {ys6X:Yk h
print("$user users online\n"); lY)S3f,]
}最终把上面代码写成一个PHP文件如下。
{c*b&Q8^t1kp@.o <?phpZ,Gl*N8PYnxp
//Put your basic server info here
v,b7Z)u1z
MG4N1t $server = "localhost"; //normally localhost uw{5H0Om*VY&Y
$db_user = "root"; //your MySQL database usernameN~,_7?o,e
$db_pass = "password"; //your MySQL database password"y!H].B7n}w
$database = "users";
&d
e:v+\YO&L9a $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
\6Zr0j B@3f // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last(W$i^4r0Jt$S8G
// $timeoutseconds seconds)
vX1r/WqUTc1r //this is where PHP gets the time
8ui(z5Sz"GA6y $timestamp = time();Vd2T,h`;Rf
V6{&h
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
9l
h%Vl;@0U yU $timeout = $timestamp-$timeoutseconds;
W3PO[w
y"sN#S //connect to database"}cxK*kjK_X
mysql_connect($server, $db_user);
2?1k^XC}J //add the timestamp from the user to the online list
~.S[ h)i(n;i $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
D;CF2`gW$C ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");'f.b!v`c(AzR-VUd)o
if(!($insert)) {
UXh#C(Vh@3~K*_ print "Useronline Insert Failed > ";
2v_(V!l!t:u;m }
;n
f{I})f y;TO C4x#` //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.g|6n+aR&~
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
_ p.Ph_+lJ if(!($delete)) {
}!ZoJ.r3d.h i print "Useronline Delete Failed > ";VX-Gk0yA\+H:X*K[
}o!nW+^vae(~{2j,d
//select the amount of people online, all uniques, which are online on THIS page

[ytq8O_Za5\w $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");1uk:F)Mr:_fG
if(!($result)) { ]'NzyO
print "Useronline Select Error > ";
H/IQmv9@7H }p(f^lKM%J;@*I|@Bw;k
//Count the number of rows = the number of people onlineP]/w!JLwmnPx
$user = mysql_num_rows($result);
+O
fC$uOF#p //spit out the results
(L
Wx2@+C mysql_close();
W:G X[`!Z8C*vU if($user == 1) {
(} p9p1oC]N print("1 user online\n");V9Qt3C,cg&B i,q-k
} else {
|4a%Tkiu$d print("$user users online\n");'?ER&^4l L&t6D&~rb
}
4hB#XC([gY ?>
$Qx/~!Wd?5SeQ Cv [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
Z~
Kf(?(J'w 以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。 n4S MNS1u
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。bcqp'\ ?
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。lX:{/y[4C6o#x
当然啦，这两款主机也是相当不错的。
Y|z|r 智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
YM4Q5MK:bL,b)i 标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年
*U*D&lqUI9m 提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
+H\7K/\%}i%_I9YX$Y 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],eC&pIwK/T\
自己加QQ去问吧。

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