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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!6Wd2bKZMv&k }#k }G
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。
)P2Y:Jlvn 首先我创建MYSQL数据库表。
r9nL~*TP4g:S.k CREATE TABLE tablename (
r?x A Zvnv&? field type(max_length) DEFAULT 'default_value' (NOT) NULL
"_ HK[:h9SB6^ V }可以使用的SQL语句。
t8PD ~x CREATE TABLE useronline (#F7T W'Wy
timestamp int(15) DEFAULT '0' NOT NULL,5a6|2}kQT [
ip varchar(40) NOT NULL,#\L{ sy7F!OJ;pG3O
file varchar(100) NOT NULL,)qU^9ID
PRIMARY KEY (timestamp),
;p)]o}5z6xAxs KEY ip (ip),
d U*RMO9`ce(PD KEY file (file)Wc N_tT _+ym4B
);下面我们是PHP脚本,首先我定义MYSQL的信息。
+T0_"TbB~,? $server = "localhost"; //你的服务器 VGY1dqd(y1b
$db_user = "root"; //你的mysql的用户名 b;x5jm'`,XU#W m
$db_pass = "password"; //你的mysql的密码
8vxGJ,plvn` g $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)6_"F!nz7@~
$timeoutseconds = 300;取当前时间。
U+J0@7{%|M)QI*Wz9d $timestamp = time();上面的完整代码:
o.t*n\;m7J <?php)U1q'@"?umz
$server = "localhost"; //your server
E.sU&XYbO0IG $db_user = "root"; //your mysql database username
,Kh![%^PY,P6D $db_pass = "password"; //your mysql database password if anyZ%DzXc1k OA
$database = "users"; //the db name%r([ ~9R oNC
$timeoutseconds = 300;//timeoutseconds limit
'jfPspdT //get the current time
@a WB3@:? $timestamp = time();n&hnJ6C*}0m
//calculate the lowest timestamp allowed
z`]e/k~7W z $timeout = $timestamp-$timeoutseconds;8v0r|^gYBN
?>连接mysql8i}?#aMqf
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。/H$w%z ce
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
KE n7[0`+U4~`#@ mysql_connect($server, $db_user);查询数据库的代码:0E^+iO1]c\J
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
C T D8kr#@/E#b $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
(kE0eMHn)nlxI ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
:G4q W/h lG9i1F 如果用户用错误信息的话,这样处理。;H$o'o1T|.R'b F
if(!($insert)) {
}-w?KA Y print "Useronline Insert Failed > ";
,mhVv9n,_iS1WSe-Z }然后实现当超过设置的时间就删除该用户记录。A3c$p+V0C Q
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
9o8S D9@`Yu qG if(!($delete)) {
@UW ySw print "Useronline Delete Failed > ";
2XqgJ1}a c }下面我们解决数据库中不同IP的问题
J n9[4eqy} $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
$M&]Z!Gt4IVO U C k G mysql_num_rows(query);来统计用户,代码如下。H}w6tP n{
$user = mysql_num_rows($result);最后关闭数据库。
w AdF'o3U mysql_close();显示在线的人数。:^d L;uH"Q7d`3C
if($user == 1) {\J5~+~V9c%x(Ma
print("1 user online\n");
4Y:g"pQmR` } else {7M}c&M2_(R(F[S2X
print("$user users online\n");
ypRozS$PV5[ }最终把上面代码写成一个PHP文件如下。
2?Ca+M8rm#H <?phpv6x3Y kC/}c(k
//Put your basic server info hereWL$}}lkX
$server = "localhost"; //normally localhost
UX c!I#ja%@4FC $db_user = "root"; //your MySQL database username8_UF#jZ-POv
$db_pass = "password"; //your MySQL database password
,P7Dt7GQ $database = "users";
7pp.c8Q5x)l"b^ $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are2o%~0fA4Og
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
7| m9S K,c$u0C:RZ u // $timeoutseconds seconds) COlx-o&[l
//this is where PHP gets the time
kA_NCm $timestamp = time();
3wk5U x+q.Uq //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed+yxH1A@g
$timeout = $timestamp-$timeoutseconds;
7G3[[`M i&n //connect to database p9b!`E,~VO-]#h F q
mysql_connect($server, $db_user);#ULa6U.P+J/Z"g
//add the timestamp from the user to the online list
#Bi3u#hR,o(YYn:} $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
"m(l4E|7e9hWcC ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");SJ Y"c AI'GG+Ad
if(!($insert)) {
8[\v5i[g print "Useronline Insert Failed > ";
{6z-@6K|{ }
9U8Mu7x/i/zs jP2F //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.NRR5G Fo1I.?G6z"p
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); p[ ZBz-c
if(!($delete)) {I3n*G2h.K5by,|9M&Fn
print "Useronline Delete Failed > ";
&R1U;s@qPZ }
3[K1xB G8z} //select the amount of people online, all uniques, which are online on THIS page
6j9J&I"[f9}'E $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
.ojCo%@.l~,o if(!($result)) {
TBf/W;U;j.prD)Uxr print "Useronline Select Error > ";
LW]&wf }
Hv1C3xs)U //Count the number of rows = the number of people online
F.j].A{ D $user = mysql_num_rows($result);x9rz9qAi.[5b
//spit out the results
!U;}A2v+M(E c"z mysql_close();)Vj3S/G?k#o
if($user == 1) {
w C?$W S `ZL,DH aND print("1 user online\n"); zDb-`]1S+h
} else {
K Yl2S#t print("$user users online\n"); z5?P2kA ],R!L
}&q Lw!S:|%T
?>
;_5]0u gIOzw/m [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
5[;F9l*Fg+e$T 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。
6z \k8I]9CIE"Q 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。
Q7O$v-z2QXw 我之前建站的时候选的是他们公司标准商务E型,因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
t"Y,J | q 当然啦,这两款主机也是相当不错的。7k-Ki9{(~R`t]&U,h
智强商务B型:Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
I?$L!SV!O 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s NRp)~0O:p[,s` w
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] 0T[ fs7|5W
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]-c#p+Q%C"\5kg
自己加QQ去问吧。

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