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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!
li NM W-b*? 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。UE ?8Lk{R[
首先我创建MYSQL数据库表。 g"_*O Sw0r } W
CREATE TABLE tablename (z }%U@JoB|
field type(max_length) DEFAULT 'default_value' (NOT) NULL
(JA5I5_(w }可以使用的SQL语句。9lD2L$R]'Q Vq
CREATE TABLE useronline ($Dnl zX |sg
timestamp int(15) DEFAULT '0' NOT NULL,r`7jb Z\
ip varchar(40) NOT NULL,
csShiT6Z,{&Q oo file varchar(100) NOT NULL,3b/IZp9Y"c b
PRIMARY KEY (timestamp),
[*}R5Sn(~X&LI KEY ip (ip),R+V M5d$Y `2R5`/?9m H
KEY file (file)f%j8WuS,o
);下面我们是PHP脚本,首先我定义MYSQL的信息。
KJ-@pcTl \Yv $server = "localhost"; //你的服务器
b/ssd*F $db_user = "root"; //你的mysql的用户名,l]"ut]&tJ
$db_pass = "password"; //你的mysql的密码
)g.e-dTa.n/j $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
*a)J!} F'lSw&|,_ $timeoutseconds = 300;取当前时间。&iU S m4Q*i| U G3p
$timestamp = time();上面的完整代码:
2h["~Z*q t <?php
8G x7SL ]*bp $server = "localhost"; //your server
uQd1zt2G$O $db_user = "root"; //your mysql database username
%[1H'?Qwa(F n $db_pass = "password"; //your mysql database password if anywu T/}Q*v
$database = "users"; //the db name
6Et8[L&x1K $timeoutseconds = 300;//timeoutseconds limit
:E F:Y9hcE"uW0@,K //get the current time
Ps5A*t(`CA P&k $timestamp = time();J j{w*N
//calculate the lowest timestamp allowed{6]*r"ShZ
$timeout = $timestamp-$timeoutseconds;
"`xC%{;kA6C?|/{ Z ?>连接mysql*d7hD)w8LX
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。Q9ex-SR'Q^9s [S5b
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
s\b mh mysql_connect($server, $db_user);查询数据库的代码:
MF;I,Y"]i ggn4S u mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
R3A4O2vW $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
-L1]'G'shWG ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); MY+z-m)bEv/_}V
如果用户用错误信息的话,这样处理。ijkX#bOh.~g+^l
if(!($insert)) {
A H,pl)`PX L(t print "Useronline Insert Failed > ";
&p7s8@v2G&XM"? }然后实现当超过设置的时间就删除该用户记录。&m`Qu$kD dQ
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
/jtk+]A3H{ if(!($delete)) {
&qj,r]M5A9i}"UQf print "Useronline Delete Failed > ";
!cD O*cm2h~o }下面我们解决数据库中不同IP的问题8M'g#@qMq4S c YX
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
a;h#W K-l;J2X(p4M mysql_num_rows(query);来统计用户,代码如下。
)GGWhH^2r.Mq $user = mysql_num_rows($result);最后关闭数据库。
W'xp2s'S'cj MD ` mysql_close();显示在线的人数。
(@1Z BnU9Wq9t"Hu if($user == 1) {0DrC+H R'X#X[ dZ
print("1 user online\n");
+g#yR0|b7^+?]-y0X } else {
0|(JH.b'~ print("$user users online\n");
`1N,j-t O*I }最终把上面代码写成一个PHP文件如下。
RP8f,QSr <?php\&c r$d2F/X
//Put your basic server info here
_T5mkU\H^I*j%G $server = "localhost"; //normally localhost
p]!]$B YSl'~#^ $db_user = "root"; //your MySQL database username
"G;W;u1W}2n $db_pass = "password"; //your MySQL database password5z)n6h4v*CI
$database = "users";
c`*U3g~9S"lWK $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
6m#P'qw,@JM // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last#fWc m&i8ThU@
// $timeoutseconds seconds)y8Hq!n7Zq
//this is where PHP gets the time
1t GKc)g[cv"F $timestamp = time();
N?"l U&B CS#] //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed~C%[Vg$hu
$timeout = $timestamp-$timeoutseconds;
'Axtu:E6F //connect to databaseM/K4k*\9U.A
mysql_connect($server, $db_user);-}(K*p,w&heA
//add the timestamp from the user to the online list z`0|/o"wNr6_
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESz/Tcs@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");9u*M%Y)HZ V7[
if(!($insert)) {&O.U2K1n o3Un'F*O
print "Useronline Insert Failed > ";
"H7v)c&xAP }#D;_ Qrv m!y
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.3_7y])T6s y~g-Y$@`T
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
y7x-}}/i if(!($delete)) {la ]3CSyC,v3q f
print "Useronline Delete Failed > ";"l@Rb5p ~0{!~
}"@S rM$PB
//select the amount of people online, all uniques, which are online on THIS pageUxV/[q {
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");I:u${qO(c~
if(!($result)) {R/AB9y0Jb%E
print "Useronline Select Error > ";
s X n2Y tbY b!N4r }
n%B:Tre.f //Count the number of rows = the number of people online
m Q0H,E"C$~.T $user = mysql_num_rows($result);
Jk6IGmy ad //spit out the results4A~#_#Oc,Jry;E/qJ:m-a
mysql_close();
6r'~5[.fV0g if($user == 1) {
3Hoo#~,M print("1 user online\n");$Diu[%K%pu
} else {7|F:J(U jV3K:}lNk\
print("$user users online\n");
,p-A)CpYz@ }
#Q"@5oOj[r,@ ?>c PC"k ^-V
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
M-{f0MCH#G\ 以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。XbR.A6`,?0{
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一,现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位,产品功能已经非常完善 ,特别提一下几个特有用的功能:数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。U2fH+sD%l&_l
我之前建站的时候选的是他们公司标准商务E型,因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。G7?m4r7_Yz7G
当然啦,这两款主机也是相当不错的。
%iB/v DJ(_K(W 智强商务B型:Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年:cS6Y,fz ^
标准商务B型:Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年 F$m/\%C6_,Mu
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] /E/U8e@f0GO-v
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]
Wun.}H 自己加QQ去问吧。

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