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！
&a2iv3E+jK 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。
:[,gwUK Wud 首先我创建MYSQL数据库表。
:k'K/O` b|P CREATE TABLE tablename (
*f8w&K7P'OIwGG@ field type(max_length) DEFAULT 'default_value' (NOT) NULL9Fv(|(g!c?i5@ `
}可以使用的SQL语句。#va~o:L Y-f
CREATE TABLE useronline (
3?8S\ Xu%z^:Mw timestamp int(15) DEFAULT '0' NOT NULL,
z)p0eF#k b p)H ip varchar(40) NOT NULL,
z\*M-^Q(aP file varchar(100) NOT NULL,)uI2kH1[!d%u@rfV
PRIMARY KEY (timestamp),:qY9B#ps7t;u
KEY ip (ip),
$x)E:dm5Yzv2` KEY file (file)4F*K0Gg~l ue
);下面我们是PHP脚本，首先我定义MYSQL的信息。
%zpx&?6j^;v!u:L $server = "localhost"; //你的服务器v&V/Mx
p_QI
$db_user = "root"; //你的mysql的用户名k
^aX0Bg6L
$db_pass = "password"; //你的mysql的密码
bC,I6?n{lp{u $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
Kr/MuV $timeoutseconds = 300;取当前时间。
(eFGL9~a3x0J $timestamp = time();上面的完整代码：X,t i-gbD3g
<?php
-? M#W4g)T } $server = "localhost"; //your serveri0c)e-P*l
$db_user = "root"; //your mysql database username
R%a(Y6M\Y/nm $db_pass = "password"; //your mysql database password if any
|d0xC$di`+~R $database = "users"; //the db name
K A];s"u $timeoutseconds = 300;//timeoutseconds limit/ql,f@ ['SWRS#f
//get the current time
:O2ub-imI $timestamp = time();
k\+R&L6]8w C //calculate the lowest timestamp allowed
9g8O0c5kV1oh.q $timeout = $timestamp-$timeoutseconds;
R]3WmPQ8?*iL ?>连接mysql
}7S%X ~vsy:J K Z+Q mysql_connect('localhost', 'username', 'password');也允许使用变量形式。'PV/Q6Jc?9gz S
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接I-Un)Hnq1a
mysql_connect($server, $db_user);查询数据库的代码：#~ M+n[5Uw2c
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。`/Fc9CW}Ei
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESHr nj1rI'_ b,M
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
\/Co }/Yt(P 如果用户用错误信息的话，这样处理。.WA c!sa
if(!($insert)) {"k9T;Z yu[
print "Useronline Insert Failed > ";
My n4d:sl }然后实现当超过设置的时间就删除该用户记录。WR]V2Zzd ?
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。VUU6M?r*smj
if(!($delete)) {
)o?_"^5wD3All print "Useronline Delete Failed > ";`BWl-b
}下面我们解决数据库中不同IP的问题
)U2Cz3_W:@ $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
k0Bz7yDH^.] mysql_num_rows(query);来统计用户，代码如下。XC!G5\)K7wX#^o x
$user = mysql_num_rows($result);最后关闭数据库。
)z@['cB'[n&^ mysql_close();显示在线的人数。 Ze7Hl"i@Z;d,|y
if($user == 1) {u(NA2A.s J'w
print("1 user online\n");9c'ab7{3t
} else {
M%lp:ia print("$user users online\n");
/n RiAdK0h*V1u }最终把上面代码写成一个PHP文件如下。 DP7YC
[9IW6Q
<?phpv{P,Acmm
//Put your basic server info here+jV[:v%AX+jB9M!M#C6n2u
$server = "localhost"; //normally localhostbEK%SNnr qn
$db_user = "root"; //your MySQL database username h:GN$R8^q V
$db_pass = "password"; //your MySQL database password~v+ON:c
$database = "users";,^W6]'j/{9o%V!Pv
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
^KQ]H(x%YTh // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last8Alv{TiM
// $timeoutseconds seconds)
'ojq&w'cImo4zS //this is where PHP gets the timezRR'bez g8wzx
$timestamp = time();f.W yZ`
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedZ#ei0bLi
$timeout = $timestamp-$timeoutseconds;{V dQ8k%Y6e-B
//connect to database.y,cik1zO
mysql_connect($server, $db_user);
3TH,J.d.\!ab //add the timestamp from the user to the online list
r0H;m6aq s`,| $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
D/M$l;t Z ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
,o`'@-K[){0t if(!($insert)) {
q2w'Y^L,p:{;| | print "Useronline Insert Failed > ";
_CK`iTqE }
8Z-a:[3up6S //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
ry(T } ~(zYu $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");HT&r(mH:Eo2R
if(!($delete)) {1_:I
mzAt3g,s
print "Useronline Delete Failed > ";$X[i{!wiAH U
}
1l3e1Wj0h //select the amount of people online, all uniques, which are online on THIS page
&LB*zpc7HfyPa $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");|
z
pq1\
if(!($result)) {
x~9em gM print "Useronline Select Error > ";X4Qv9]{Xz U%a7G
}
zC
V"s5c&e3g[ uP //Count the number of rows = the number of people online
G-K
O"h6hz $user = mysql_num_rows($result);
}j'qMf,ZPR //spit out the results+v,`"a?y"G
mysql_close();
"o$La1pa/gCy if($user == 1) {;P+Gx@dG;|.Woe
print("1 user online\n");
"s^@!M0W/M
S } else {
Aa*^*xLx6U print("$user users online\n");
%I K:t``d&i+]n }
a eD~-S9D ?>
a'w c/Yj8y` V.UVo [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
[2\8yUYUY ?%h5ip? 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。-u:Qlv-~UiW
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。
$G#M6?6gn7VR
j2Ca 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。
$q*N/^W*o `4xF2`z 当然啦，这两款主机也是相当不错的。\4K#l5|rH K
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a(K/l?%hV
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
G3Ewg8jn*no4k 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] ONj3Q.h
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gu8@Nu"Y(~ 自己加QQ去问吧。

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