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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！
q,p fB p5r DNo 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。
(P5l rmx~ JR 首先我创建MYSQL数据库表。
ujVSf ^ V} CREATE TABLE tablename (
XY-lcuJ Yf9bP(R field type(max_length) DEFAULT 'default_value' (NOT) NULL
4C'f#_4JD] q@os+L{W }可以使用的SQL语句。XD$z\5|1i,KHY@#K
CREATE TABLE useronline (
;f*m Z!sLed timestamp int(15) DEFAULT '0' NOT NULL,
H y'q:p,B9[ ip varchar(40) NOT NULL,gF/l F1]w%\x3j
file varchar(100) NOT NULL,Ok`}Q5E`V
PRIMARY KEY (timestamp),uxk8X] gh
KEY ip (ip),!M E5Ho2m3[
KEY file (file)-^#U+zKXD+i
);下面我们是PHP脚本，首先我定义MYSQL的信息。2q[+q;Ie0~*eh
$server = "localhost"; //你的服务器nB1ji0p0@y*t
$db_user = "root"; //你的mysql的用户名
C`*t)Bu $db_pass = "password"; //你的mysql的密码
+?(F)GHp K+v $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)s/S4bJo5pf8u
$timeoutseconds = 300;取当前时间。
[._|"`,q*i;z3Pl2c:d $timestamp = time();上面的完整代码：$|RJN+iuD%o
<?php
8[!G dn7~N $server = "localhost"; //your server@)kE2@9Y)x0s
$db_user = "root"; //your mysql database username
j+^|4Yj)iP!qC $db_pass = "password"; //your mysql database password if any
_d\ P/K&gw $database = "users"; //the db name&rpx+w1R
$timeoutseconds = 300;//timeoutseconds limit
,e$l&x;S&m-^'g#L //get the current timejJW,BW_,L!k
$timestamp = time();
O
b[en8b-X/dS //calculate the lowest timestamp allowed3Sg
s:L%RB-iI
$timeout = $timestamp-$timeoutseconds;(CC y:c)px(P"F&k
?>连接mysql
+j3hN%vZ`~@/Z mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
'r cKm
vw mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接}nl3to v
mysql_connect($server, $db_user);查询数据库的代码：)y8c*{7RC-F0b)A{_
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
0^
}&?(Qd.s,Z $insert = mysql_db_query($database, "INSERT INTO useronline VALUES'\w}7ycUw
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-ALiy4lk
如果用户用错误信息的话，这样处理。m)M UcL3}&_4[m
if(!($insert)) {C$YzvGsbz
print "Useronline Insert Failed > ";S2e2yO5Kdn
}然后实现当超过设置的时间就删除该用户记录。hcM+C(p.OkoB
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
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if(!($delete)) {w/[p"d/\!O
y-spk:K
print "Useronline Delete Failed > ";
,GH&\y?eu9n }下面我们解决数据库中不同IP的问题.r]"[FCf
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
f/L9HU^s%naE mysql_num_rows(query);来统计用户，代码如下。F w{o)p V\iK
$user = mysql_num_rows($result);最后关闭数据库。 |Q U*y8b,^w5i8q5W
mysql_close();显示在线的人数。
T5I$eU3i8h if($user == 1) {
Z0tm'_p&S,r print("1 user online\n");/| }LP.vwE
} else {
(X1O;K;FA@2iU print("$user users online\n");1|0mK!`L
}最终把上面代码写成一个PHP文件如下。n~&{#U5P%v$?+`?!{E"~
<?php
,vE*m/s Z //Put your basic server info here
F
GI:lCG c $server = "localhost"; //normally localhost
q {n8F6p)P/s $db_user = "root"; //your MySQL database username
:M
MC\-m)F2{nh $db_pass = "password"; //your MySQL database password
!\p x T+vE7N $database = "users";bp,?`;jsP-N
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are[A _G dOp,a L6\
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
-_'r [O TUR'aC3g // $timeoutseconds seconds)+d;UR7R2o3YC^?n
y5C
//this is where PHP gets the time
~ B0ZXZG-a5Y[ $timestamp = time(); W(T7\8}k] F8{
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed?EO"c7d0`OY
$timeout = $timestamp-$timeoutseconds;
)W&e5p
yBlzO A2V //connect to database
%k,P,C;XUX mysql_connect($server, $db_user);
t!I|F!MU!`0h //add the timestamp from the user to the online list P8w'_x*x)|j(v
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
*lUEKM ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");O F#r5sI%w(?a
if(!($insert)) {;@$FK `"K2uZ|`
print "Useronline Insert Failed > ";fx!Eb_&WDPQ
}
#qFcfm~$g //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.\5B z7REn
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
qnAkt3c if(!($delete)) {)we h,`0`-NU__
print "Useronline Delete Failed > ";
2Q9Q&Sd9Ae/v%hv1W!JJ }/`m:}8Az
//select the amount of people online, all uniques, which are online on THIS page
+f,Pxf#l&AQ $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");H'm v-I ut"E;q(wv/vu
if(!($result)) {``-|t;wV5a
print "Useronline Select Error > ";P wBe%~r.g1s1f8]E
}
O,?/^z,r#Q&Nmr //Count the number of rows = the number of people online
/d2OBJ"V2O $user = mysql_num_rows($result);v8UBFj+uwB
//spit out the results9R7Rp2Q7nk
mysql_close();nH7H+{B u nI#~
if($user == 1) {
ol8M{%~wh7L print("1 user online\n");
E0jhg8C;pK9`9|f } else {%VHV"w8C
print("$user users online\n");v/W?xp k/A
}WdMh4y/tp
?>/~!cnQ@J t7O"Xj
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]c"o7_#W4B(D
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。Y6j-i%z#|R||[F 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。].i/O,q6a'T:_1j0\
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。
(m
p%B(|_)G4~7G9P8~ 当然啦，这两款主机也是相当不错的。
mHAS9Xck 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

P Z6L&_$}
P 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v7cgZ6i:xfQ!i9VQ
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] !drl{l*Wi
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]a7w5nL"}qDo
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