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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!
+W*`ORD6r%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。
|3e#wO?2X9Y:~ 首先我创建MYSQL数据库表。
V)U9K;g$V"gx-sA CREATE TABLE tablename ([w0Ky3t/K#^L
field type(max_length) DEFAULT 'default_value' (NOT) NULL W%kW2v7w,p,^O O
}可以使用的SQL语句。6u um;NO8L7vS
CREATE TABLE useronline (
P @+t9v0t timestamp int(15) DEFAULT '0' NOT NULL,
a9i%Ks0{rT"p ip varchar(40) NOT NULL,
)b[&Q.~/e AB-f-d file varchar(100) NOT NULL,%X Q2D"z[&q b
PRIMARY KEY (timestamp),
:M9@\;O%Z'Y8b8h4n b KEY ip (ip),
7OAG a`,tW+R}'l KEY file (file)
/x]o&_.|3Vy );下面我们是PHP脚本,首先我定义MYSQL的信息。9`0b.VV a
$server = "localhost"; //你的服务器t"N$n)E)wn5i{
$db_user = "root"; //你的mysql的用户名
@4[L z_7q5t(rqLc $db_pass = "password"; //你的mysql的密码 C~ cpd$R e,W#X
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
\}*msA#} $timeoutseconds = 300;取当前时间。
;[&G;segqNH $timestamp = time();上面的完整代码:
"?@_IM+Nq <?php8t:gNo^G
$server = "localhost"; //your server
-F^bZ Xm!Nn $db_user = "root"; //your mysql database username5x~;?3pqK~ s7E ]U?
$db_pass = "password"; //your mysql database password if any5c$Ri.tI%s;H
$database = "users"; //the db name
#v*n)E w/o(iOr $timeoutseconds = 300;//timeoutseconds limit
PLDz3Nvp //get the current time
QffZ*];oD!?1s $timestamp = time();a(@&t:a$}ym
//calculate the lowest timestamp allowed
'G;|h_4{@.m#rO $timeout = $timestamp-$timeoutseconds;+c;Qf~o|vx*N
?>连接mysqlg4M @I9C4U Q(yej
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
,UU;RGh#P_ mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接Ng'k/X be_?%~t
mysql_connect($server, $db_user);查询数据库的代码:7^~$\0P6Yf
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
H:e2a/Y)B $insert = mysql_db_query($database, "INSERT INTO useronline VALUESoQ+vI#?'y
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
]A e7W?/R 如果用户用错误信息的话,这样处理。
7]EO,H#fPD if(!($insert)) {
$vn-p'c-eZ K,c HY print "Useronline Insert Failed > ";
y1k'Y$_e }然后实现当超过设置的时间就删除该用户记录。
9E H |8Z'FHA+k $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
lm7Kyf if(!($delete)) {0dBOY*]y+c s7KB
print "Useronline Delete Failed > ";VciV4M8j"z*v
}下面我们解决数据库中不同IP的问题|?X8{ AK1G
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用5nNK?2~
mysql_num_rows(query);来统计用户,代码如下。4YA`4KDP5B5p
$user = mysql_num_rows($result);最后关闭数据库。-gXK` K*{&U
mysql_close();显示在线的人数。
9WW(|3[&\r [ if($user == 1) {
j3gz;AZ0I!V print("1 user online\n");|&Sooo
} else {
Z^5ALn5{ print("$user users online\n"); x;y/k4W*@[ W
}最终把上面代码写成一个PHP文件如下。3b1k!gmz)\&[2f
<?php
oX#}'^"A$nkd //Put your basic server info here
P8v@;o._`ux $server = "localhost"; //normally localhost
@l&i#n(em^ d9_ $db_user = "root"; //your MySQL database username
g"U0O5}Dq;f $db_pass = "password"; //your MySQL database passwordn*`V3T*Pj(|%B
$database = "users";?x5F9Yp7^\'P
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
G^%_Cp // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
4Q~)bC$@(~&FM // $timeoutseconds seconds)'l3^*V(Z/R%G
//this is where PHP gets the time g \ftt t#U
$timestamp = time();
J by2b[Z?}%E[i //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed2H|CL9m(h0b:O
$timeout = $timestamp-$timeoutseconds;
t$\4n'G/X?:KK //connect to database
k^)Wb!sNQB mysql_connect($server, $db_user);tNO4[,eV/BB
//add the timestamp from the user to the online list
!e(o0f.~8}~anM9KM $insert = mysql_db_query($database, "INSERT INTO useronline VALUES%fG(m%T$I^W
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
X Q'l[ m if(!($insert)) {(q#O7A6n2P |%_
print "Useronline Insert Failed > ";
C9v Y&HAE }%^d%`Wdm(O?W
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.;X4KW:D`m$xx;C%I9? o
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");%zl%W.Ic1f
if(!($delete)) {
zc$qU~%Q*@x print "Useronline Delete Failed > ";
f5^ P9k@ Oj?,z8LT\ }.jtU$G^
//select the amount of people online, all uniques, which are online on THIS page}S+cc D!o
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");!qK6D I8W
if(!($result)) {e!RP'I'\
print "Useronline Select Error > ";
oC;^U(qch,q Gz3p }f%z4`+A?3j&[l
//Count the number of rows = the number of people online
3`"?U sR N O9@1C6Z $user = mysql_num_rows($result); n|)bfy;~
//spit out the results
)~)Yw5Y`F&Zg mysql_close();*d*DJ;Z*w,P
if($user == 1) {i:];E Y.{Sna
print("1 user online\n");
^;N1|n!k/c1J u'A } else {3@@-O*n1O$a0y2Ta
print("$user users online\n");/J3cD:[rQ*X1W7l
} s8RGEmn
?>nSd'Zq
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C4H|*iWmi{ 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。,O q,aJs 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。1NEAY Z.CA(A
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。
Z8TP.d ?'SX 当然啦,这两款主机也是相当不错的。(AE+K3j6Z@
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
d\v.HDr2Q 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
SYVu6L/Xt^ N 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] 6w7y9` r(@ |
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]
D0nRw^'b-\ \)iC 自己加QQ去问吧。

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