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！
5M/X[,@3S@o
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。'e/d.n*LoIY
首先我创建MYSQL数据库表。WB xP hLv s
CREATE TABLE tablename (*d&CJ ~^g4gQ7H
field type(max_length) DEFAULT 'default_value' (NOT) NULL
ul%}f+v4iiG D*}.l }可以使用的SQL语句。
M3J3`9oH7A1B6l CREATE TABLE useronline (
JF|;u3CXIJ timestamp int(15) DEFAULT '0' NOT NULL,
2T{1T'EgM#} ip varchar(40) NOT NULL,
uHYYd file varchar(100) NOT NULL,*^I8C_a/I8J,AZ
PRIMARY KEY (timestamp),1j
Z9T*~.Yu"{0]
KEY ip (ip),P;x;LC$B
KEY file (file):Z
xM1Z }Bw+QTY
);下面我们是PHP脚本，首先我定义MYSQL的信息。9O.I'qROh5@yX
$server = "localhost"; //你的服务器%Z(G&V&UXe(N
U p
$db_user = "root"; //你的mysql的用户名6oa/eP/e_
$db_pass = "password"; //你的mysql的密码-HrF,^'f&T;Nw7w
K
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)!J;a:y6b3O%^i(KH
$timeoutseconds = 300;取当前时间。5Sg};E:iB%Y
$timestamp = time();上面的完整代码：
\lm
M3n \'] <?php,Y/m-l bGy$\,YsG
$server = "localhost"; //your server~M"Ss6] o%qDU
$db_user = "root"; //your mysql database usernamew-x$wl!|3O*\9h"?
$db_pass = "password"; //your mysql database password if any
l3fF1n2SyW0D $database = "users"; //the db name7I'}T P/]ufNd
$timeoutseconds = 300;//timeoutseconds limit
f}zQd Y^ //get the current time
R"dqF$LXy@c $timestamp = time();"r\u:@)@6zk%x
//calculate the lowest timestamp allowedtyGU7W0Vo D
$timeout = $timestamp-$timeoutseconds;*Vs&[9X/C'j
?>连接mysql;U@L5wb3VD2y
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。)CE V5iL0dt
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接2M#} vylhqC
mysql_connect($server, $db_user);查询数据库的代码：xRxwa
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
*}W2}ob4tt6T i $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
+v3p0IP0@!x ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
UD(apV)d
? 如果用户用错误信息的话，这样处理。
i0cJz&N5H-} if(!($insert)) {d:{'H'd.DZ8_
print "Useronline Insert Failed > "; h%{ Q'T5\t{4d
}然后实现当超过设置的时间就删除该用户记录。
R B6ts+F%\7C
rm{ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
(i7yFJ*[h}3f if(!($delete)) {
&}:cX8D8m&w)r;d print "Useronline Delete Failed > ";-s:t3uO}&P1u:H
}下面我们解决数据库中不同IP的问题w+lelO#u#Y\U#L
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用

g4c` Kc%[Su mysql_num_rows(query);来统计用户，代码如下。
1_UE@O $user = mysql_num_rows($result);最后关闭数据库。
rD M1Y eK.^S$eI mysql_close();显示在线的人数。"L&Nj:DNe
if($user == 1) {|Y&PZ~
print("1 user online\n");
U5m(N-E!]JT } else { q?4L0N2ka
print("$user users online\n");^T$fs1S,S
}最终把上面代码写成一个PHP文件如下。|'QG8X2d*S
<?php
\*c b,P{#U[J //Put your basic server info here,l&K(O$ic
lG8E_aN
$server = "localhost"; //normally localhost"a%s7YZ-iN2c
$db_user = "root"; //your MySQL database usernamehV)V:JR1sFr5\8\ w
$db_pass = "password"; //your MySQL database passworda._S;O8W:tUd
$database = "users";
.| Y B rx2i:` D $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areF1e6qFR"B
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
!iF"]g,e&@zYZ // $timeoutseconds seconds)
m [lP%{%F //this is where PHP gets the time
i$t2G}Ga)S $timestamp = time();
3D:Kt3S-u:X | A%M G$Q //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
+]$[#[8fXHz+Hp#m;P $timeout = $timestamp-$timeoutseconds;$Si8E!d5|$l-D
//connect to database
w-V O0x7O6q,q;[ mysql_connect($server, $db_user);O/G$m+w/gh9` S
//add the timestamp from the user to the online listaF }DnAH"p
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
6AuCh!Q%[ ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
2{x$B4P"R:O if(!($insert)) {
+L?/sV:AjDn.S&|b print "Useronline Insert Failed > ";N^;`!q&M};[3l
}d;MRJ0E#D|8h
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
W7by;e:xRe a2a $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
7B{F*s&{0z,t
Z if(!($delete)) { A:jtA9h!s
print "Useronline Delete Failed > ";
`^1o7J_?HVs }f g gQp"R
//select the amount of people online, all uniques, which are online on THIS page
(I}u.X
V^!o $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");/X"x y/LJl#X| a5u
if(!($result)) {N)U$y?MW.[
print "Useronline Select Error > ";
N tc1G/b!^)G }
Th5Vd ~/~|/{n5w //Count the number of rows = the number of people online }5E1ZKw1@
$user = mysql_num_rows($result);
.jFl)^j,m7u //spit out the results1B4Ai5?;F-FqlQ-U
mysql_close();
Ko-yu0uO1B if($user == 1) {s:S7E` tP$Py{P
print("1 user online\n");
*q&Z/G]5tH/N } else {9H3M e"\H
print("$user users online\n");
3anK~DaZ }
DR`;maX ?>rh \\|6p+M
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
$yK5vvT3a L m](iz W 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。kl+bv4D2jt
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。A5m@[3W.N
m C
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。 }+HO&j&h`2{?
当然啦，这两款主机也是相当不错的。
8|`Yf[^"W r 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'L1\u~v!}
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
xG^ ]
H7E"y9jY` 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/r8R
wQY? 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]8F2h(`5Iuu
自己加QQ去问吧。

查看完整版本: 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！