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！"U)M)I+G*i$q&x$X
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。
(q0gu ]R-~!M7~ 首先我创建MYSQL数据库表。cX} |3xt C
CREATE TABLE tablename (
$e0pH gDb field type(max_length) DEFAULT 'default_value' (NOT) NULL
K6ZZH|7lFW }可以使用的SQL语句。
L%|\e.R:i;G:C CREATE TABLE useronline ("Rt!o g8N"p;s'?] d
timestamp int(15) DEFAULT '0' NOT NULL,
2} @1GaN%A ip varchar(40) NOT NULL,
js*\
{%v file varchar(100) NOT NULL,
_Hh
L ?ef;||V~ PRIMARY KEY (timestamp),O-`.TTd#b
KEY ip (ip),2X9j9Pp2A%Y
KEY file (file)%kgbkT4F
);下面我们是PHP脚本，首先我定义MYSQL的信息。
(j9?q1{!?X#@YA $server = "localhost"; //你的服务器

W%T$Ms7VS:`X*N\/v $db_user = "root"; //你的mysql的用户名ib%Wi!NHcm
$db_pass = "password"; //你的mysql的密码rY4}#mq;])T:w&Op
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
W&_3e5]Nw5b
$timeoutseconds = 300;取当前时间。
Ch.kev4A_ $timestamp = time();上面的完整代码：
7r)yTK5Y <?php
^/SXB3~#R:vv^ $server = "localhost"; //your server
CE-t}.j6n $db_user = "root"; //your mysql database username m%hZKq
$db_pass = "password"; //your mysql database password if any
Ps+|M4i*R.|v $database = "users"; //the db name6]$~#SP/vOpc$v1j%i
$timeoutseconds = 300;//timeoutseconds limitpXOTe"AO^;]-N
//get the current timeqkY7m;my Z
$timestamp = time();f[]&WGWx_"Nd?
//calculate the lowest timestamp allowedG;AP@e0A"M0l;\
$timeout = $timestamp-$timeoutseconds;
U vp-[U:E&m ?>连接mysql\^n4[w-W8c!i
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。]x'U+\({y9A
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接nS(z;M9W/mn
mysql_connect($server, $db_user);查询数据库的代码：
yJ!r/X,eW|1qs Y mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。%]O&bu9G%LWZ
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES8M(n/Zmlfs@#my
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");

\8lLhU$KPP9H 如果用户用错误信息的话，这样处理。
/C?@!OqW-xE if(!($insert)) {9N
X_&M{k#c
print "Useronline Insert Failed > ";WQ@!^r
}然后实现当超过设置的时间就删除该用户记录。
0C4q"~
ASVPm $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。:A%y([CE*p$n m
if(!($delete)) {
h3bZJ2~#`Z5pl| print "Useronline Delete Failed > ";
s3XGu p4cd-{ }下面我们解决数据库中不同IP的问题
PCSm*@m _6vV $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
9U
\nT:rHT$oFq mysql_num_rows(query);来统计用户，代码如下。
*Jbl9mn2nq6l $user = mysql_num_rows($result);最后关闭数据库。
S,dxh*B&z^1|m d.p mysql_close();显示在线的人数。
om/H%fC if($user == 1) {
_!^:~eD6m4t_S:U` print("1 user online\n");
^*L^t)HqRi } else {
^+J1g6~0K$k3iN print("$user users online\n");3sbt6p-OsiT)w
}最终把上面代码写成一个PHP文件如下。p~"`K_
<?php
E0SAWHC&w3Ic7}0hU //Put your basic server info here
p1m]*S
tb $server = "localhost"; //normally localhost
v4R&G;OsP gBY)L $db_user = "root"; //your MySQL database username_N&hWF(m
$db_pass = "password"; //your MySQL database passwordJ/r~a:pX
$database = "users";
vW^U GnW$l;V $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areC4{Dy-b0RlV
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
KZ$G jOe6_^#g W // $timeoutseconds seconds)
m ]&emZs8Ny //this is where PHP gets the timehs)Ln3AI2q+_
$timestamp = time();
+Zk7A5Y5x{&y //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedK xIG2hwut
$timeout = $timestamp-$timeoutseconds;sDl2@#Y;p*rL
//connect to database
3z.aqPqVND mysql_connect($server, $db_user);
:rIe+?I-? iqjt //add the timestamp from the user to the online list7Ncg#H&}b#c
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESgD'zyn%D:zG
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");,GMA6W^K@$|"E
if(!($insert)) {)~s8m#Zh*lI2M5v
print "Useronline Insert Failed > ";
&m#r2i#EhH;_r }
S(Rx.x+hF6Hdc //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.1o&RMSZ
HX
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
9sW,b}*f)Vrq,nz if(!($delete)) {
H"EE;s9M print "Useronline Delete Failed > ";
7GN.e#[.B } GrTbk1`}
//select the amount of people online, all uniques, which are online on THIS page"HO-z1i1cV
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
;Itn0P-n3}
\UPjxw$K if(!($result)) {
R6U]h7Cc9? print "Useronline Select Error > ";9AzA0S/|C&_9Kv
}V#}@g^q&@Y
//Count the number of rows = the number of people online
Efh(WoH;u%\ $user = mysql_num_rows($result);$z,Gp7t}@*b9ne
//spit out the resultsfy.Ux]
\O7D[
mysql_close();k"? j&z.i/V!s:l7D
if($user == 1) {(}"zhM8s%r%S)T
print("1 user online\n");
9R+Lv}kT$h:G0{d } else {3L5|Uo-HY
print("$user users online\n");6Y&t;A8Bd9u
}
|j:o/q2SA3f5jt ?>/hT#| lt'fw
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
r%g%dkC&p|)E(\ 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。
%p-We)|
L"s:{DR$oh 时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。:J)UD!N3M
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。tx1S |\/i7C?C
当然啦，这两款主机也是相当不错的。G!r*x2TJ
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年.E@F \#y1C%M/OP!I
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年;^$m Lfg$F:PV&w
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] -jX6Mtr_e
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]vYz0z_/x1tx4uT GK
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