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！r SrsB(V
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。
DY`po|;sCK 首先我创建MYSQL数据库表。
-bxv*YJ#KX+T,] CREATE TABLE tablename ('S-\KhJm
field type(max_length) DEFAULT 'default_value' (NOT) NULLRnN~D![ua9fQEt
}可以使用的SQL语句。
} YVBZ3K#^ CREATE TABLE useronline (
\vu!s KRWv timestamp int(15) DEFAULT '0' NOT NULL,q T&GG0]"M9F
ip varchar(40) NOT NULL,\)HE!zv` k
file varchar(100) NOT NULL,y0?]iR8S2z
F#d
PRIMARY KEY (timestamp),
7UG-I%K*Q KEY ip (ip), w*F%}q6a4w"W.]
KEY file (file)jAvwn
Y-U
);下面我们是PHP脚本，首先我定义MYSQL的信息。
2[|S7{:cA P $server = "localhost"; //你的服务器
Ej#TTE,q~V z $db_user = "root"; //你的mysql的用户名
%{.bp)Il]T $db_pass = "password"; //你的mysql的密码
0m*?Be}+B{g $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
Q%GR{ri]y
S:k*Fr $timeoutseconds = 300;取当前时间。#P%i*y7I{0}*s
$timestamp = time();上面的完整代码：I-T(\t l
<?php
%J+u1k+x zH6L{ $server = "localhost"; //your server]jX%gl
d*zV&yx;k6H
$db_user = "root"; //your mysql database username;\JQ.UC3~JH
$db_pass = "password"; //your mysql database password if any
tCN+oV F?!O3F $database = "users"; //the db namez/g-Fz+vIl)tP
$timeoutseconds = 300;//timeoutseconds limit
PjFOu //get the current time
)WFJ:H_ $timestamp = time();(DU6d*v`2t q
//calculate the lowest timestamp allowed
#u'z"Jr S_5|$v*G8E $timeout = $timestamp-$timeoutseconds;wCb4|zE Ap-M
?>连接mysql
2h2]}3T5qm9}4o9SWZ mysql_connect('localhost', 'username', 'password');也允许使用变量形式。2LTT"J'h.in\0r
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
1hc1u4r/d{@ mysql_connect($server, $db_user);查询数据库的代码：
8n{C1wb(^ mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。~q[y8}ci2X
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9fGN)Tl3t)?(z
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");WzU,z1g"xv.r
如果用户用错误信息的话，这样处理。"x9euyW
if(!($insert)) {Q5k$WW6d1a0G$@ D;{9CI
print "Useronline Insert Failed > ";
'p#K~qF du-SL }然后实现当超过设置的时间就删除该用户记录。M1~ bzHZzt
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。3yw"]#Q+H0S z+L
if(!($delete)) {
n wW
nZPr*I g print "Useronline Delete Failed > ";
J }+deNvo6^ w }下面我们解决数据库中不同IP的问题*^N `i\_8gO9I:S
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用b?`!t*i;v
mysql_num_rows(query);来统计用户，代码如下。 Nw.B&F9J)c1o/e2M%K
$user = mysql_num_rows($result);最后关闭数据库。
Dto y.a e @ c mysql_close();显示在线的人数。
+@lq$_y+B J0bD/r if($user == 1) {x-F Df'K4y
print("1 user online\n");k/wZ8W m,{5Z{jk|
} else {
,~#k\L/`Zeb print("$user users online\n");
$H9l7^wf_2t }最终把上面代码写成一个PHP文件如下。
2KYgyb <?php
H0]%eW q //Put your basic server info here
lj%Z1Y_+v.v $server = "localhost"; //normally localhost?8~2~@](~
$db_user = "root"; //your MySQL database username
F8cMN#q9?[!K9q@%X $db_pass = "password"; //your MySQL database password;uQ-^/t)L]
$database = "users";
y,_,gaB2h g$m$tF $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
| Y5z4I1}/r'o;y // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
lhZ+z|.ET // $timeoutseconds seconds)
)xqU,}&g'H //this is where PHP gets the time$H'm9g}2R$T~:a
$timestamp = time();
@1WgM[n)Y} //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedG)gqd2K1hh&C&t|Tv
$timeout = $timestamp-$timeoutseconds;
_8OTd? //connect to database:E0ch6G%iYu-]'v*^
mysql_connect($server, $db_user);
(@ r5peo7Ds,h8M //add the timestamp from the user to the online list
o'c ~7ZeX-B` $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
1^~u\z%b ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");(WFf+?z
if(!($insert)) {2hN0B7t s~
print "Useronline Insert Failed > ";
ft[}/xc2@0Srk }~ \n$f6X7n$K]3n
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.8fH;f(?/J6kV"wmx
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");k!Y3Mi8V
if(!($delete)) {Ygq$H0H9N#[K
print "Useronline Delete Failed > ";:T-lan2OclR
};[3X5wNg#m o~z7B
//select the amount of people online, all uniques, which are online on THIS page/@)X,N6e+p.s"}&q
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
'O:uN'~u&mnF{ if(!($result)) {@:J}(G~7BVT
print "Useronline Select Error > ";
'pm0U+Dq b:n c+?.}9| }&P/b7o_,b
//Count the number of rows = the number of people online
~VD6\:aSr^ $user = mysql_num_rows($result);'Mv}w)` Vd
//spit out the results
%?"R/l9u]$h,GXt,rq mysql_close();.{#\#I8\{$].Ib
if($user == 1) {+|2_~.t$CR:_
print("1 user online\n");
+@]a1N2Zd_$k } else {hz E%G^Oa,s
print("$user users online\n");
&[8y0lop,^ }f4rH6w"\&f)`
?>8o8Gig*m4j*{J
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~$NOqY3N;QkvMk0R#F 以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。Y-`$H-c2VEqN1E M(^g
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。
`4[-c0rD}akC 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。
#DJ)YuW T 当然啦，这两款主机也是相当不错的。\+r] @C!x
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R/H FS3D
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
/SL&[+qs A 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] PY"xC\u`3{ Kr
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