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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!
? p^ZTD(h 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。
Bh3z+y;t*y| 首先我创建MYSQL数据库表。fy|3o#r ]
CREATE TABLE tablename ( d-R4OQ1|&`Q
field type(max_length) DEFAULT 'default_value' (NOT) NULL
)Ou6G[8E4K4J }可以使用的SQL语句。IV6Y't O5y
CREATE TABLE useronline (
L[:p D0{b timestamp int(15) DEFAULT '0' NOT NULL,
'u]4l7?'_p;Z*P ip varchar(40) NOT NULL,0Hl+y-UE%AjL
file varchar(100) NOT NULL,
C$Qj!nRU+Bid PRIMARY KEY (timestamp),
@^ O9h;^0I KEY ip (ip),
L.~8CD6{f KEY file (file)1qEFW8q ^Z
);下面我们是PHP脚本,首先我定义MYSQL的信息。
d#|[w8D#c $server = "localhost"; //你的服务器#s I a,U+_DEa
$db_user = "root"; //你的mysql的用户名W,IJ A$h#J3U7q
$db_pass = "password"; //你的mysql的密码+Q:oT#^3] o
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
%lk?Bys$u6Y $timeoutseconds = 300;取当前时间。
r D Nk,L!O $timestamp = time();上面的完整代码:.KO4th*f*yrI
<?php ^X4Q&bX$k,E'l
$server = "localhost"; //your server VGc"[CS,O-^
$db_user = "root"; //your mysql database username"S`gK.[
$db_pass = "password"; //your mysql database password if any
e8UEU2G)m x $database = "users"; //the db namet+I Ne0qZ
$timeoutseconds = 300;//timeoutseconds limit6S^;] e ]:q
//get the current time6`Jy)i r
$timestamp = time();
N6C1yoQzwC&T8Ah4J.w //calculate the lowest timestamp allowed
&yX.d+|!~3rv*n $timeout = $timestamp-$timeoutseconds;
\"gH)H Z^F ?>连接mysql
3X*[Sf| g mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
bp1?V5x3U7yP mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接ZI:g5d$m!Z-H
mysql_connect($server, $db_user);查询数据库的代码:
jw{yA @*{A mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
["Pw0`5} ] ~{ $insert = mysql_db_query($database, "INSERT INTO useronline VALUESwgf!?Xz-j$x)@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");#N~%R1ki/Ce.t$y.qH
如果用户用错误信息的话,这样处理。4W F0rF8R cyve
if(!($insert)) {
4id-k f|t5j:QP print "Useronline Insert Failed > ";
A8Dyf [jk` }然后实现当超过设置的时间就删除该用户记录。%?*\_e vR
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
aF_:Ab3J k if(!($delete)) { T5J9l.L#_ Q
print "Useronline Delete Failed > ";
!y%h@(D#c5BL.Y+{*Z }下面我们解决数据库中不同IP的问题.O A/R,V Q!?~
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用 W/D&p,dZ
mysql_num_rows(query);来统计用户,代码如下。
;m[n*~+l(~ $user = mysql_num_rows($result);最后关闭数据库。DN-{L0Fl
mysql_close();显示在线的人数。 F0a+Vu/W
if($user == 1) {}"z`W m/M
print("1 user online\n");~'x H%fq"d
} else {c)}/i,KUI
print("$user users online\n");
n&XN^%k Y3lm }最终把上面代码写成一个PHP文件如下。1~-a P)~$_;P!p2@
<?php
2L0u:o'NZ //Put your basic server info here&Mo1DI} f,h.AB
$server = "localhost"; //normally localhost
8mI)nJ*f0t4v-V$]M $db_user = "root"; //your MySQL database username-}]7[k{/v9H%C
$db_pass = "password"; //your MySQL database password
"e4wBG&d $database = "users";
$EO!n-J"\ a i $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
y ^.\7C o4V Y // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
nmN5kH]8Q%pB // $timeoutseconds seconds)
Unm m/E //this is where PHP gets the timecP?!j.y;G&R)L dW
$timestamp = time();
qyZc/Dy oPe //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
/rhK7tdX $timeout = $timestamp-$timeoutseconds;E:K1?xf5ge"g3q?j
//connect to database
1C V^pb mysql_connect($server, $db_user);
&b6F3z(]1ol //add the timestamp from the user to the online list
T6d?*y6W $insert = mysql_db_query($database, "INSERT INTO useronline VALUES&D c5jh lXp/}Q@#@y
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");V x.|f$xQ
if(!($insert)) {
5BJ{'e)u,~D print "Useronline Insert Failed > ";$O:?*~l[b:l
}
a U[1{.CK //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
'A-Q\ I{0@nS $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
5[;e.pGzK5h)b#fm if(!($delete)) {&gp8xC(A(a
print "Useronline Delete Failed > ";
+[w6MLL.bZ }nZ}~u$f+VD8sN
//select the amount of people online, all uniques, which are online on THIS pageCZ9wZs @
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
:H ycx,x9\ if(!($result)) {
6j.x#X;X)A:A print "Useronline Select Error > ";
y#??IW`s^s2j }
7_:W})w0XS@ z/h //Count the number of rows = the number of people online
k }g~.ACqG&Ro $user = mysql_num_rows($result);L)wD#O3b)X7l'C
//spit out the results
#{$J6a?w-d.]zp7Y mysql_close();"eR&v/VD
if($user == 1) {
OrX^9o,Srq print("1 user online\n");
U\9\9HD S/RJ/Y } else {
lrM ~0b_{7D3a print("$user users online\n");
!m*aD.`*h1r }
V W9@Z Io7sP@,@ ?>
E2cc1M;e no L [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
t`4d9la d Dq#o"y 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。 ^?0Bd+FEk,PIH
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。
Q{F ZHr? 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。@F+v4xc.}%c,WTeLo
当然啦,这两款主机也是相当不错的。s!aR:uF"g
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
$ig.^8X5u:c 标准商务B型:Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年D)k2|%YO)H+k;X4c
提供一下这个公司的联系方式:请见:[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
&^m!_{$XCM 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]
#vo U+B2OM{Rz3j 自己加QQ去问吧。

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