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！

@ Od,nn[p 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。
Ew9n3F? _ 首先我创建MYSQL数据库表。
/OpA&r@.?1?ZQ CREATE TABLE tablename (1f+I/t"g`'b
field type(max_length) DEFAULT 'default_value' (NOT) NULL
`$K.@x_~&lc
^ }可以使用的SQL语句。
,i-h_g$a4s CREATE TABLE useronline (
7]/_H ?[P9k#f'v timestamp int(15) DEFAULT '0' NOT NULL,
&N#a,M{w
d ip varchar(40) NOT NULL,
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j t3vWY file varchar(100) NOT NULL,e(q b%rN I3j3er,F
PRIMARY KEY (timestamp),
`roG)a;t
Ysm KEY ip (ip),8vV3ui3X*~
KEY file (file)r"B*gg?{^+N&C/H
);下面我们是PHP脚本，首先我定义MYSQL的信息。fa??g9{
$server = "localhost"; //你的服务器j [9p.y;{
JOAy3{
$db_user = "root"; //你的mysql的用户名
eVv u;i9])YI $db_pass = "password"; //你的mysql的密码9tWxIig8_.N3N
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
A,cA5W/nX;}2P}Y $timeoutseconds = 300;取当前时间。
1x)r#]1em)Q5bP $timestamp = time();上面的完整代码：}4y*^k'_/tJ$]3K
<?php
*iu8~n]K[9Q8cA $server = "localhost"; //your server
!XL&m,n$zPP $db_user = "root"; //your mysql database username
!|VW-hx-p $db_pass = "password"; //your mysql database password if any!k^E K?l
$database = "users"; //the db nameZZr0SKd
$timeoutseconds = 300;//timeoutseconds limit
z*Hm2D] //get the current time I?C-kS0yL
$timestamp = time();
3\/xM G-Q //calculate the lowest timestamp allowedA6t;JHcHP
$timeout = $timestamp-$timeoutseconds;
d?}n-j W ?>连接mysql V5k8@8T`6tGzPz
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。sa(Z,Rqn
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
|J&gS5t'M5s5h n mysql_connect($server, $db_user);查询数据库的代码：

K2}7N&F;_R*sX|B mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
U9z k8_&AuXV/G $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
Fk5Q ltbT+c)U ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");B5c6PhoZ B
如果用户用错误信息的话，这样处理。'FVM;V:z nh[:O&_}*T
if(!($insert)) {&f%p utS-X(Mfclg
print "Useronline Insert Failed > ";
sJ5P4kL }然后实现当超过设置的时间就删除该用户记录。"xDW4aS
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。s4p%~6QGpU:z
if(!($delete)) {
LBdF };B-`1?.pbc print "Useronline Delete Failed > ";q.b/a0a/z*V q8?
}下面我们解决数据库中不同IP的问题
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~rn*y!LR $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用Y"{,L3} \4AN!j
mysql_num_rows(query);来统计用户，代码如下。
Pe"x4z+j6tK%h;w $user = mysql_num_rows($result);最后关闭数据库。?M{ZH,~
mysql_close();显示在线的人数。(kt3@7K X qC
if($user == 1) {.W"{KHRn
print("1 user online\n");;|p.jp7gH`
} else {v"y?LF2Hk,M
print("$user users online\n");
CcuVxjd
}最终把上面代码写成一个PHP文件如下。+[
q+W(e wSh8J?,b%U
<?phpu3ZV](p5eF
//Put your basic server info herejlY%U"Jn'\'A
$server = "localhost"; //normally localhost
(tkD2z`Y,D"^:v $db_user = "root"; //your MySQL database username
-iC/?!E\#r $db_pass = "password"; //your MySQL database password
6j5OTz5Y/R $database = "users";
t3B+~P6c!V[ $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are#[2iwm^ V
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last+x'}0o8J-IKW{U
// $timeoutseconds seconds)
(Ad^/UQ5?I*I //this is where PHP gets the time
7g)A#o+IRHl.mc $timestamp = time();l J1Su)u^(r4naV/O
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed4Z^5hKA%{9C
$timeout = $timestamp-$timeoutseconds;YwijS:y*E
//connect to databaseC ] F
W:le6sr `2G
mysql_connect($server, $db_user);j&W,bl9l`tf
//add the timestamp from the user to the online list,pJ%NS2K8z#g0V:V
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
q5_HB)n:AA"r4l E ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");3U}-wG#Pl?9~7v
T
if(!($insert)) {
1P/o-[Y#}bR0v k print "Useronline Insert Failed > ";#pe.S1CA&z]+YM3R
}'G-dI j\ EE
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.X,o&Y4Vk
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
z ko!j'bm#hE if(!($delete)) {
C7Q z.F-C#f print "Useronline Delete Failed > ";
}NC*M}/R7O }(b5dC|,hL:_b._
//select the amount of people online, all uniques, which are online on THIS page v(k!]hnn%A4q3}@
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");,Z:bAP7u5e
if(!($result)) {2}'_H_"i-v
print "Useronline Select Error > "; s0\Xk7\
n
}
x#p:U&QwkN //Count the number of rows = the number of people online
&F2\$c"b[5l? $user = mysql_num_rows($result);
9g%_~x5k_P //spit out the results Z.`_9F1\|3y)y^
mysql_close();
R]0}|x I&E&@6d if($user == 1) {
0p-C1k.[#hNq print("1 user online\n");)j%ao"ZTN K
} else {nS,E6[5nXh
print("$user users online\n");2yK#VpyN^!M
}
n:IbGL ?>
&S3b,Xqjs5A-M R#b [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
/{S q*|,QJ:E5Op 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。
@.GsTxO.He+E 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。$f/r?j){'_
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。
(S^7u
l ^~ 当然啦，这两款主机也是相当不错的。R!M_#rv
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
!c5x AEGFW 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f1md? n6lc'ag
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] x#\i_3K
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]
*D!x_)pb 自己加QQ去问吧。

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