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！*XKweF/CJ1h-e
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。
bSWvp 首先我创建MYSQL数据库表。9~z;p vB-W3Aop
CREATE TABLE tablename (
}Jq
rfI-m/FL ~"t field type(max_length) DEFAULT 'default_value' (NOT) NULL
3TD9A.wC3r-D }可以使用的SQL语句。 _,Y P~%NBDA
CREATE TABLE useronline ({1fb lc^uMs/D
timestamp int(15) DEFAULT '0' NOT NULL,-\)S*Ke'i+v(WN \
ip varchar(40) NOT NULL,
V-L]&]@ file varchar(100) NOT NULL,K(EOg|e1J_V"r
PRIMARY KEY (timestamp),
*r
?*~vyX1?n KEY ip (ip),
5r*qRc l/vVF KEY file (file)&A&F;KsT6EQf+o:D
);下面我们是PHP脚本，首先我定义MYSQL的信息。
0dFMCMU$|U$@ $server = "localhost"; //你的服务器i0t3X8Ad"mV7m l
$db_user = "root"; //你的mysql的用户名M3g0I ?s(`)F+@ p
$db_pass = "password"; //你的mysql的密码4Kmb:b1D.I4V7r
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)

A,d*['UlY)W $timeoutseconds = 300;取当前时间。_4p8z'g5n+Lg$\
$timestamp = time();上面的完整代码：
/qkr3`0xD <?php5m}6R`:j
$server = "localhost"; //your server
M,`#Sx%| RJ,}X ^ $db_user = "root"; //your mysql database usernameW{9Y/PJ}/B `
$db_pass = "password"; //your mysql database password if any
.Pz0\g(BQ H $database = "users"; //the db namemr t8u \
$timeoutseconds = 300;//timeoutseconds limitX!`?\#g(T
//get the current time}\Oc0hk6Eq
$timestamp = time();
4q5K
NolB{ | //calculate the lowest timestamp allowed8eCR-N.N$M'HL
$timeout = $timestamp-$timeoutseconds;2m{*hh`
?>连接mysqlO@{;B1X k EV1Wc
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。9u#N dL O
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
%` }KE7dbR mysql_connect($server, $db_user);查询数据库的代码：
Svxuzl mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。 S%Us\D
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES0R2Z5H!s}$^$~
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
/E*L:Z?x 如果用户用错误信息的话，这样处理。I*IA|4v@@
if(!($insert)) { g\h_E1{B"o:`0U
print "Useronline Insert Failed > ";bh#ZgG'x
}然后实现当超过设置的时间就删除该用户记录。{7F
|0^ _1Q
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
0X7o/Q1kZ if(!($delete)) {C H+u`K_
AK;{0W J
print "Useronline Delete Failed > ";2s.xLj__PR
}下面我们解决数据库中不同IP的问题a)Dj6K;Q%xZ0P#Y(G$h
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用u;L l(m6~
mysql_num_rows(query);来统计用户，代码如下。
R`*F)|9O~ o $user = mysql_num_rows($result);最后关闭数据库。 OO1i$lsed7^(Z
mysql_close();显示在线的人数。
:japo7[n,@9Fb:z _ if($user == 1) {
1L'h-wwLbG+`t print("1 user online\n");k#HVf_
} else {
W.[|3NY] E print("$user users online\n");)Y4|N,O.j)N9g
}最终把上面代码写成一个PHP文件如下。+zp\6G(If+m
<?php
~bdb;L\ //Put your basic server info here\w5jDj/h
$server = "localhost"; //normally localhost
A}6Ck_O~xGPp:[P $db_user = "root"; //your MySQL database username
sZ|
K7~1VV@1EO $db_pass = "password"; //your MySQL database password#C$G0Q6jFm
$database = "users";
,k(VAb0?/@pc $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areb$yG:n"f6r6XK#G
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
,?J*J N9~ // $timeoutseconds seconds)
G!C+E3}?m //this is where PHP gets the time
8z+M'm,O~!th!f%W8~S $timestamp = time(); TO&W1mza g.Rv
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
s-J"x3`m
fL,~,G $timeout = $timestamp-$timeoutseconds;
A4c%`4Va'@yz B //connect to database2HG |9rf2wU h
o
mysql_connect($server, $db_user);!L1Y8K Ecs8q
L
//add the timestamp from the user to the online list7xz)m/}J[kz
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
+_-H!PCh U9G ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");"^x%?&KR%o ~N
if(!($insert)) {
k#j }'G:f/_:Yn7{;m-Y print "Useronline Insert Failed > ";
!VJh I#_4ks7@d }
,ho:A%`?m //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
oA/[#V3Xo$O.[)e $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
B
| e*_TC if(!($delete)) {
R!KD\u print "Useronline Delete Failed > ";LYj9V1B/W#J
}d!W*`1@0Q^/a+v+G
//select the amount of people online, all uniques, which are online on THIS page
.XlF5w.y[!a Y $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");n_tB$`WcF t
if(!($result)) {
K_O(HeY#QwJ print "Useronline Select Error > ";
"ATO#NkG4W fH N }
O!~qjR*I //Count the number of rows = the number of people onlineR;H'Ig;p/B
$user = mysql_num_rows($result);
cT^t*gm!v //spit out the results
9w.F1X+x%G` mysql_close();CJp L2T0@%zJ`5W
if($user == 1) {b&x3mlr;X8@'^
print("1 user online\n");
7fI8`
YBW,C8j1wc'KN } else {
Y!bQ]b print("$user users online\n");.nP/@e/R;t _2Z
}3xlc6{S1av
?>
t;k%]V3zU9hk8U [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
LM,qg[x7^ap2e8F 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。DXG)s{c 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。$d7jU9wS2y@a%e
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。
ob-rl-ks{@s 当然啦，这两款主机也是相当不错的。/l3ac3]:vC"w
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/q _L0s;Rh
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(F@o|8g9E
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]
F-jC4`+~!n3n 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]-Ht/F9c4A
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！