捌玖网络工作室's Archiver

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!
"Z'y:[/E9PMd7? 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。
PRX0h1laNCy 首先我创建MYSQL数据库表。-`?M9E3h^~8~J$G#Q
CREATE TABLE tablename ( rP&G'}2r;aRX
field type(max_length) DEFAULT 'default_value' (NOT) NULLb_6c|8Gw]a
}可以使用的SQL语句。
9k/Y`Xtn#L CREATE TABLE useronline (+Yp({:Ra
timestamp int(15) DEFAULT '0' NOT NULL,Z4V)R L*L4c3h~
ip varchar(40) NOT NULL,
}5C!w5|0M3aL file varchar(100) NOT NULL,
7O#m6zGW;sl7w PRIMARY KEY (timestamp),
)D.x B-|7nOg KEY ip (ip),O?V1fK1o:Y$N
KEY file (file)
%J(s@9Xo!f#G_y );下面我们是PHP脚本,首先我定义MYSQL的信息。~^wHE,J+_c
$server = "localhost"; //你的服务器0y9Q gKy-H2qwQ
$db_user = "root"; //你的mysql的用户名
"E,F R z us[J $db_pass = "password"; //你的mysql的密码+{qw?q j4l
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
~f1rtq![m $timeoutseconds = 300;取当前时间。J1ZVB]DhUi
$timestamp = time();上面的完整代码:
trB/Ojuk%@*V <?phpHs(c/v z
$server = "localhost"; //your server ~1a)L^:WQ'|G _-M-xt
$db_user = "root"; //your mysql database username
qD$Q#MM}3_3mS $db_pass = "password"; //your mysql database password if any5Fc7p$P`};]9U T5L
$database = "users"; //the db name
/q8i MR.}}5\/B*d $timeoutseconds = 300;//timeoutseconds limit2c@g qJ;um'K
//get the current time)Oz)sJt0y?
$timestamp = time();
-[Z)k9p3e\ //calculate the lowest timestamp allowedFr(K2C`;T
$timeout = $timestamp-$timeoutseconds;!NR|+C"?VJ t
?>连接mysql
^){pR+k/c X mysql_connect('localhost', 'username', 'password');也允许使用变量形式。p @Mh#s:z
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接'S-h@"\/x o2J/N
mysql_connect($server, $db_user);查询数据库的代码:v0}x_|9q n{
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
{ `,p"i;D!^nR:X5U9P $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
gz U_ m5r+Q ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");v8r,g$C5o#h3RClQF
如果用户用错误信息的话,这样处理。
v(?z-@ [{#] if(!($insert)) {
BSqh`L print "Useronline Insert Failed > ";
;x)a9S"_7@G&}3N*h.w0o }然后实现当超过设置的时间就删除该用户记录。
[|f Mn;w L9b9D $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
`dmZ!i7[ if(!($delete)) {Sp f m5^p
print "Useronline Delete Failed > ";
j,|vwQ }下面我们解决数据库中不同IP的问题
2SVJ%v\jD] $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用'];BF,ze4x"q{m
mysql_num_rows(query);来统计用户,代码如下。
{rs-}~k,r K6Y*| $user = mysql_num_rows($result);最后关闭数据库。4b)Yb_yyP e_
mysql_close();显示在线的人数。*xn8wnQi
if($user == 1) {#h? vk0k:sZ6i
print("1 user online\n");
eaaI^ s } else {LR*XD7@%wh0S%^
print("$user users online\n");/\S?@}
}最终把上面代码写成一个PHP文件如下。
`6CYYtR <?php r.Bi;U/|-x8W
//Put your basic server info here+f F Lj/Z k%ed
$server = "localhost"; //normally localhost
|/e(p8DpR(s $db_user = "root"; //your MySQL database username
Pk:oBce0C $db_pass = "password"; //your MySQL database password
2q;n]Wm\8b{ k9N-v $database = "users";\~$|+U]u4f}
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areX?\s)ISv `:SWd
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
QIP'fOHOk&g9J // $timeoutseconds seconds)2l9V[ M&v9h_
//this is where PHP gets the time
$bW5AyD g5yg $timestamp = time();
}e b:ybZ+d //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
9I a9w!V Zib,y ` $timeout = $timestamp-$timeoutseconds;
MwziZe8]N JF#s //connect to database)T0]O]U#A3g
mysql_connect($server, $db_user);
'` FL_'o+K6jh //add the timestamp from the user to the online listq/sW#p#YQ(rX _"s6P%]
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES?]:lv f0wBY\
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
(Y I K$X*N5O+f if(!($insert)) {xGf P yG(n5k)Y(M
print "Useronline Insert Failed > ";!nA;I4UC`7G3@ F
})k)s6mN j/]H
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
6Y.l3f(\6nt{Z $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");"o2f\"\K^$baf1{!{
if(!($delete)) {
S6k3pZ W'c print "Useronline Delete Failed > ";
`q%\O K }:k^qf{6E:|]5q!r$g
//select the amount of people online, all uniques, which are online on THIS page8~ B;d&[Y_%E!{d*^E
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
NlUT Z if(!($result)) {3z#d3p`J)v {M$~
print "Useronline Select Error > "; U;Q/oe4j'M&N
}
|g%Ys7m? //Count the number of rows = the number of people online
!L!y-bZF\y8i $user = mysql_num_rows($result);PNN*u,U
//spit out the results9H.XR"~mE&k A-e
mysql_close();
bu r/p0@B j8La if($user == 1) {4NA$@jLZH8a1Y)K&J
print("1 user online\n");
jM3[8HxH } else {G6T+S'f lI}"U m
print("$user users online\n");
(J2BO6KX)T9z }/Y"ss-k*R6l
?>+E7I+v3Pf4{
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
;D/R4{ }'[P`$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。
BTA z |7_S? 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。3X g%ICZNK/b
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。
'K"H;I6C kB 当然啦,这两款主机也是相当不错的。
#Z&`!gL+[8@Jq 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
XGG X)i?9@l ~"h/X3_ 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
TV!CMw 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] X&@%q-m _#p~w7V
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]
L/]'QQ#] {T` 自己加QQ去问吧。

页: [1]
【捌玖网络】已经运行:


Powered by Discuz! Archiver 7.2  © 2001-2009 Comsenz Inc.