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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!
U#S!drX!B z 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。"K/IR#Y A+q2kH
首先我创建MYSQL数据库表。Z2go*xfa'\h
CREATE TABLE tablename (
2{A3[;D_ x!_ X field type(max_length) DEFAULT 'default_value' (NOT) NULLX}'y4PQ.Rbl8F
}可以使用的SQL语句。
F\9n2pQ CREATE TABLE useronline (
y C Ob0@V)o/Jg timestamp int(15) DEFAULT '0' NOT NULL,
]:ai$tI5j5Y ip varchar(40) NOT NULL,
s;{6@'{q&u3NbT8m file varchar(100) NOT NULL,,_l3Zx0pC6Y1{b
PRIMARY KEY (timestamp),JpO.r4x{&iL*N
KEY ip (ip),2[ T)a!^(W:TR
KEY file (file) ` Cw%^i&K
);下面我们是PHP脚本,首先我定义MYSQL的信息。
Lf3kj*Pk7L:wA4]l $server = "localhost"; //你的服务器snp [&gZ
$db_user = "root"; //你的mysql的用户名
}P-B%e!ZB%` $db_pass = "password"; //你的mysql的密码
1}#[2gG4_ $database = "users"; //表的名字设置统计的时间(多少秒内在线人数).L*a8R3^S%_
$timeoutseconds = 300;取当前时间。F5b?U\!M
$timestamp = time();上面的完整代码:
Z$tsx(I7{(]2w[,w <?php*Tf*|V_.[ _
$server = "localhost"; //your server,ycE|N`R
$db_user = "root"; //your mysql database usernames.JT6A9H`s
$db_pass = "password"; //your mysql database password if any
"d*S'}`(\;f%M7gh $database = "users"; //the db name
_Nd2rI#v3^ d $timeoutseconds = 300;//timeoutseconds limit
,A X0pzeO4a_ //get the current time
/G"DUKe2}+m $timestamp = time();Fp dn8P)vv
//calculate the lowest timestamp allowed$VqMA*} ? n6l
$timeout = $timestamp-$timeoutseconds;
5l4L#Y(F(cwp ?>连接mysqlo tjm_'h
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
m&R:X8q6RM| mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接\ s%G ~0~ D
mysql_connect($server, $db_user);查询数据库的代码:
C(ow,IL7K$oS mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。'c-bJ"DSS"wm?W*G
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
b`{HH4K ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); NKVQ.C[/JM
如果用户用错误信息的话,这样处理。
#x&|0PQ)w4ZU if(!($insert)) {rc'YO"O
print "Useronline Insert Failed > ";
0jP4n:FYg7Qe#e6C [4O }然后实现当超过设置的时间就删除该用户记录。 ^0Xir7v8l o!@qg
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。-C6RXj&@]c-\K
if(!($delete)) {
KFv&hB print "Useronline Delete Failed > ";Pl)f b k1z {\S]
}下面我们解决数据库中不同IP的问题
T5HJ0|V $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用*_Jl7h-TO Gp
mysql_num_rows(query);来统计用户,代码如下。
eh/c%]7|e pG%z $user = mysql_num_rows($result);最后关闭数据库。+[4t @t~7j0S8H.AGX
mysql_close();显示在线的人数。
9e9} O:U/RG0y? if($user == 1) {
5eUgv?(r!YZ~ print("1 user online\n");
8f6dw6y2nS_&IP } else {V r9IQTt
print("$user users online\n");yvj_(NxF? D"K2f
}最终把上面代码写成一个PHP文件如下。
K\3Fcb+Sf-EnUH4D t <?php"FrGiA1u
//Put your basic server info here\7}*m O&M}*z;_
$server = "localhost"; //normally localhost%gq`%N)VA
$db_user = "root"; //your MySQL database username
%L JE e~1a&D#I _ $db_pass = "password"; //your MySQL database passwordzB'c!s3_^,o
$database = "users";
B9E2]eFP $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
tB+\$o.FX)K$?!m // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
f0t&V2W:fe&s:~ // $timeoutseconds seconds)
~;qgj4Nf //this is where PHP gets the time
^J}h0j(OvM9? @$l $timestamp = time();
6d:b\-_a g#J Z //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
I8^.y"B`5~ U $timeout = $timestamp-$timeoutseconds;
7J H?4Y7Fal //connect to database
$q\ R7p_/n]#B mysql_connect($server, $db_user);
x p&y.V^~ //add the timestamp from the user to the online list
*Y8lt`(J&[!ow $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
:p5w!bVE%K ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
Z3{ p GR&omX*x+T if(!($insert)) {
OK5\3Dz"B4I9Dp print "Useronline Insert Failed > ";
d YSEm6m }PuWe.Cs2la(b0s1I
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
x[~ K3eG%c2y $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
-qTKN nS if(!($delete)) {P T k2Dh$Ts;t
print "Useronline Delete Failed > ";7N#M!N/Y,F#O%n*}'m8j
}
h0vI6Eou/m;Xs1q(j //select the amount of people online, all uniques, which are online on THIS page
*r9DD a{*Y.?0P9|Z $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
z~MrAT,vQs:zc if(!($result)) {6Z,n2KA R
print "Useronline Select Error > "; m.|0ENG
}br5C R#m'e/nTG
//Count the number of rows = the number of people online#dri bD ^@.Wz
$user = mysql_num_rows($result);
[ IDY1f#Q*QA K //spit out the results
}%DR lFC k8B.R mysql_close();
B f3OY.lJ k if($user == 1) {
yr;KH9V6j5p'r print("1 user online\n");
+^:r9C$~&@/hz } else {
+d.a0|"T^ print("$user users online\n");
3cs5rr X9S!i(u{ }ODy%|s6tb {#`w
?>'\\K*DE;_5iP(x
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]5i!|6t$I&bf$f1p/R
以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。.T"v*ux1G ki`
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一,现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位,产品功能已经非常完善 ,特别提一下几个特有用的功能:数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。$pv{"F0i5JS y
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。
BeY1{R3jR G f | 当然啦,这两款主机也是相当不错的。#@4kt s!nKYw"e
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
n%y9ihm)j 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
p7? BC+H;]R4N q 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] V3HQoD!P#B#I
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]
*Qzg]!Z&cw 自己加QQ去问吧。

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