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！/FfZE1Z
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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。&TW+@7l
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首先我创建MYSQL数据库表。
v;S/XZ%eW CREATE TABLE tablename (
u,Vuh[/?P field type(max_length) DEFAULT 'default_value' (NOT) NULLSq`8ez:f _
}可以使用的SQL语句。-V3ug,u ny"D3i5D{
CREATE TABLE useronline (5O{*G"wRj
timestamp int(15) DEFAULT '0' NOT NULL,7b ]rS1B*E'@$U
ip varchar(40) NOT NULL,qU.C_@2og%g-x.O
file varchar(100) NOT NULL,#ui{+Ch
PRIMARY KEY (timestamp),
}b qf(C_V g KEY ip (ip),^k/E,}6Y;hC#Xr,p
KEY file (file)
T5L,`VY );下面我们是PHP脚本，首先我定义MYSQL的信息。
$~
E_
~z $server = "localhost"; //你的服务器
2xs^i;~k,}Y N(b $db_user = "root"; //你的mysql的用户名&B5g-n,_6r:p
$db_pass = "password"; //你的mysql的密码p{gZ/me+B
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)MH jee;x$eA
$timeoutseconds = 300;取当前时间。jej'YG4j#Jg4Y
$timestamp = time();上面的完整代码：
aV6Z}!k4sUU
G <?php&Nf-C2I._lA
$server = "localhost"; //your server
-w6j)b2y*d&KDGK,t'@3t $db_user = "root"; //your mysql database username&vp8}%YGE
$db_pass = "password"; //your mysql database password if any?6v~U&dp
$database = "users"; //the db name(Mv0o^ @D0U:hib
$timeoutseconds = 300;//timeoutseconds limit
7Zn:D m? //get the current time
oo [3IWh$?z*H_ $timestamp = time();!S0JrS;N6c@V_D
//calculate the lowest timestamp allowed
9X9UJsqH{Y $timeout = $timestamp-$timeoutseconds;
G-Tp
j,s*Z%lV ?>连接mysql
N8c}atd mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
X'v~i)l:m mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
p&ak^^@ mysql_connect($server, $db_user);查询数据库的代码：
X*L8@2p/S6?#s mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
1GpTF,e8w $insert = mysql_db_query($database, "INSERT INTO useronline VALUES2U}/A'g*C4M
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
A.C9yloZP"gcj 如果用户用错误信息的话，这样处理。
p}:v!l Go*Td if(!($insert)) {m.z.F5k5W P/i~)ak
print "Useronline Insert Failed > ";
2w,h;|0W5GH#k$P }然后实现当超过设置的时间就删除该用户记录。8hiH7K.Du(_1_YbOKX
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。 j1@owa:bC*A4R&F`
if(!($delete)) {0p-[1mdF
print "Useronline Delete Failed > ";
s)wn]}%h7y&N }下面我们解决数据库中不同IP的问题q4\j(Oid [
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
&dEzkN+q mysql_num_rows(query);来统计用户，代码如下。
/Ww3YV!N
ki3y $user = mysql_num_rows($result);最后关闭数据库。
,h&I;Kgf:g/_ mysql_close();显示在线的人数。

m0B q.soz if($user == 1) {6vk,Fg+ckW
print("1 user online\n");
z-I)v"B6E3`9] } else {
s@[uS Ib6U| print("$user users online\n");
8~\Enc-Y }最终把上面代码写成一个PHP文件如下。
A9H_B bd/Zs$B <?php
%W I%ve*T\ //Put your basic server info here
B.a%C jq6cHX $server = "localhost"; //normally localhost}zy+eV/j
$db_user = "root"; //your MySQL database username
tj3y%P]WpM $db_pass = "password"; //your MySQL database passwordC z9k"a nyc?#h'P
$database = "users";
h)J{ajK(?X7j $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areE0o\m,xe
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastA'w'sW7^T
// $timeoutseconds seconds) M kd7@} E `N
//this is where PHP gets the time
4os\P:Z.X:A0J f $timestamp = time();
ZOx ?&}%GhI //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed%\ QC)MoxI2K
$timeout = $timestamp-$timeoutseconds;
I DR mA4xgAY a //connect to database
ymu/`H$R ge+]%? mysql_connect($server, $db_user);
s \0[|V1t,Y //add the timestamp from the user to the online list
|6t(gP*Z4T"c] $insert = mysql_db_query($database, "INSERT INTO useronline VALUES^xq$z3P
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
:@{7ef,It+q if(!($insert)) {
[H7|S a*H-K print "Useronline Insert Failed > ";4H$Tn o$Au!N-o ~^
}6|Q$i]1N9a;K| {c
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
Pq+P;F!D
f3A $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");5MFzo6tmJ
if(!($delete)) {hA*}g?7l
print "Useronline Delete Failed > ";/g!p sR5M`F8w&x
}g;Q0L^O3u0fp
//select the amount of people online, all uniques, which are online on THIS page
@Z8mgS w)I8~ I $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
FbL5b/t(d$X if(!($result)) {
4H5\2~'x@I print "Useronline Select Error > ";-_;ieeg6y
Zn8U1~
}
p7Wd7s@ //Count the number of rows = the number of people online
~ Y'S2Jv!x} $user = mysql_num_rows($result);G.X&jx~Z#GGH%c
//spit out the results6t3FDV_(m T
mysql_close();g}u1G,r}
if($user == 1) {Yy])iK,X
print("1 user online\n");G,b4BQ.]7UN
} else {
Wi.~&BT~ print("$user users online\n");
p(_`%bb^ }

i)W u/\(m*R ?>
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D h-iF[d.^ 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。
&M z^;K.r 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。
$u!U)\Q)k8|/b8~MR/o0N 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。
T'O&Z,m%t;ZI 当然啦，这两款主机也是相当不错的。
Y0Rq0KK n4ER_ 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
c+hf5LPu z6u!\ 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bz/t~6S!A.~0jpK
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MI
m fN(DX/j 自己加QQ去问吧。

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