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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!
i/VR)s,_7b 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。
H7Y"|1Z}] G 首先我创建MYSQL数据库表。
(z$g,W ub nsz CREATE TABLE tablename (
,RbKX:qzC$Az field type(max_length) DEFAULT 'default_value' (NOT) NULL@rk ?sK*EOH
}可以使用的SQL语句。^F1I&k8mUv
CREATE TABLE useronline (Duc)| XT5q ?3W
timestamp int(15) DEFAULT '0' NOT NULL,
ep z/x8s2I;v:l ip varchar(40) NOT NULL,
V#_y-Nt$wmNnG.PL file varchar(100) NOT NULL,-tA+D\FYH uH
PRIMARY KEY (timestamp),
J,z$r2m3ROP KEY ip (ip),
E4p8rV'}+TE KEY file (file)
9yWPv3b*G6}5M2h9^ );下面我们是PHP脚本,首先我定义MYSQL的信息。K9GCw3~
$server = "localhost"; //你的服务器.H\BWE'}
$db_user = "root"; //你的mysql的用户名F/Jf T~W+sgk]
$db_pass = "password"; //你的mysql的密码O{ |2Zm:t$]K$u e
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
%g#` @~u-R $timeoutseconds = 300;取当前时间。+sH"mC;~m+aa/}6q`
$timestamp = time();上面的完整代码:
&],Zk%XF+U*K Cr/Mp <?php
fftz R2I $server = "localhost"; //your server7u"{~+_ef3Eb0U
$db_user = "root"; //your mysql database username z'I BT]n
$db_pass = "password"; //your mysql database password if any
QE.W'y6b ~ Q8c-Y $database = "users"; //the db name \*ZAW~o:Kpuc J
$timeoutseconds = 300;//timeoutseconds limitG^ pmrRL
//get the current timeY2`!t;`pI%C%]C K
$timestamp = time();
)`Ksy7fwHT"N9z B6S //calculate the lowest timestamp allowed
3{RWeND $timeout = $timestamp-$timeoutseconds;ll?.{6?DF
?>连接mysql4IF1|1Tj'u
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
)X j'nA Has~] mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
,I"pe"q VQ+f/? mysql_connect($server, $db_user);查询数据库的代码:K!ac(b^:K(g
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。3l:p2L:pa8@0?(qI9?s^
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES+r%b~4P8m-s^:J\&j^
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); I5q/td:e7S%r
如果用户用错误信息的话,这样处理。H-~4X3}/U
if(!($insert)) {
8k&\ hR|6H!R2yX | print "Useronline Insert Failed > ";
E*B C S#os4j M }然后实现当超过设置的时间就删除该用户记录。
$^a:J?:z x [-yJm4M} $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。d8U N f ri)K
if(!($delete)) {"^7[8th!?
print "Useronline Delete Failed > ";
-tDrH8Ei/a }下面我们解决数据库中不同IP的问题r F,wZ,M |\"@
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
/v|I6a:T6te mysql_num_rows(query);来统计用户,代码如下。D(T@di6B
$user = mysql_num_rows($result);最后关闭数据库。%Kr XZ7G$i3t!l$[
mysql_close();显示在线的人数。
wV g.h I iF%` if($user == 1) {
5d*CE1p9Xe&y print("1 user online\n");
Y4|F(H A4D(r } else {-Y6V dATg)S
print("$user users online\n");8K DIx!F y$J
}最终把上面代码写成一个PHP文件如下。mf F'R S S.v F
<?php
d] P7u;smq //Put your basic server info hereP N2~%^8rW+~
$server = "localhost"; //normally localhost
vWnA |;O%l1| $db_user = "root"; //your MySQL database username
O2gy/c.|R`/L $db_pass = "password"; //your MySQL database password
%hHcGW!q `cYJ/G $database = "users";
hRvE {/rz|pN_ $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
Z,K5gn.y // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastY Z!K`"|2I9E
// $timeoutseconds seconds)~p)QydN%A:\z
//this is where PHP gets the time c:Ed3jCt?c
$timestamp = time();
r-ZIX3|5[Vn //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
K"e1q0PbsT+O!g $timeout = $timestamp-$timeoutseconds;
G_0no{ p //connect to database N.ZjE/q(~)J-J
mysql_connect($server, $db_user);;Jb%jP9ty!An
//add the timestamp from the user to the online list
zHcV%E&] Dw7}&_/l $insert = mysql_db_query($database, "INSERT INTO useronline VALUES8KZ$q?#G-j8iGV
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
5^1MowFOt&P if(!($insert)) {
iYm9@vIIp print "Useronline Insert Failed > ";w`&t$uPCJ;b%w9[!n,t
}![%{d6|a y Evnuv
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
i8p0TMN7I7_ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
Q:Z @k TlxC if(!($delete)) { X&pu0Kl+~h6XF*@2J
print "Useronline Delete Failed > ";r"nt#j9PcS7|$w/U
}6Fy#FR#Tnx/t}
//select the amount of people online, all uniques, which are online on THIS pageI hv0_\
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");SVS8Zg'q#m
if(!($result)) {
g!z3mg2Q0Fo%P print "Useronline Select Error > ";^g0i^7OS-\6J
}-Y7D)J}x/P T
//Count the number of rows = the number of people online
u)Qm(A I.y)N $user = mysql_num_rows($result);$A5x7|'F7F5g+H$c
//spit out the results7t pE]j Od)V(XC U
mysql_close();!L3\2xI.} s3cV+GyI
if($user == 1) {2q]Q)_Rz `
print("1 user online\n");
D M-fp2~2R3cnql } else {k0l x-Q$w6`$`5E9[6Do
print("$user users online\n");
D-E s(P0B5JW;? }
A2L2N'~riy4O ?>O QGo}Y\.@|$U
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
w_6s8rk 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。.C"rC3IG(` j0_H:H
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。
V,PhGs6G!f/Ban 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。
?)_"tib 当然啦,这两款主机也是相当不错的。dze/f,H@WtA
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 q!S.DW? c m@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
`tL"qJ)a!x 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]
:L#ca)a-@9Eo,rl 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]
4i{ q#p? qr!tBF 自己加QQ去问吧。

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