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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!4OWZ6Q4w*J4{7Q
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。yD*_(qZ A
首先我创建MYSQL数据库表。b6Q{*G3Ho A
CREATE TABLE tablename (u"TnvTV)R
field type(max_length) DEFAULT 'default_value' (NOT) NULL
B zb ug }可以使用的SQL语句。hp3fp2K4}P`YE
CREATE TABLE useronline (
`rT@J+bsBQ timestamp int(15) DEFAULT '0' NOT NULL,
7yQ9K8Z1x ip varchar(40) NOT NULL,
m4k]mK h7X file varchar(100) NOT NULL,5Jtx0nv-o5OW
PRIMARY KEY (timestamp),
Zu#Cdn#\b&J KEY ip (ip), Q5DoV$A
KEY file (file)dC9MHj/d P2st
);下面我们是PHP脚本,首先我定义MYSQL的信息。
T4nq`i $server = "localhost"; //你的服务器"O-P_j.u+u1WCb
$db_user = "root"; //你的mysql的用户名d3i5Hqa]8`f
$db_pass = "password"; //你的mysql的密码
*[v-r5W6` $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)[ mH W3| a
$timeoutseconds = 300;取当前时间。
H.s%I7l r e1v~ $timestamp = time();上面的完整代码:
O,g!WYVf <?php
!qNGwm"y8{I $server = "localhost"; //your server
/Dywd6C f*bM'r $db_user = "root"; //your mysql database username
_.i3L7l En&{[ $db_pass = "password"; //your mysql database password if any%` \ W%~hR
$database = "users"; //the db name
$PT.y-B'^e%dn z $timeoutseconds = 300;//timeoutseconds limit
7b_]:Hy,j&L w`^ //get the current time$X4fd:qY7EJ8D
$timestamp = time();
PdIR*EE //calculate the lowest timestamp allowed4v$P~%I)e{"k
$timeout = $timestamp-$timeoutseconds;E+ZNNI`%e5Ac
?>连接mysql5\$? k#l2s
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
r|+Xp7q&E mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
q;]x `F'i#k(au8_(w y"j mysql_connect($server, $db_user);查询数据库的代码:G-oz!CLD N+{_j
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
Q&Q._#}.P @X*TB $insert = mysql_db_query($database, "INSERT INTO useronline VALUES4~8TEG.u*x2m t{-z
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");4rv{&kguk!r
如果用户用错误信息的话,这样处理。d)XU$n;VSV!h
if(!($insert)) {
N3|/az7~&\ print "Useronline Insert Failed > "; C5pD!w Erv7_~
}然后实现当超过设置的时间就删除该用户记录。
@5CZ(|D#_;\/}%w $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
|9T8au$qx ynu if(!($delete)) {N"L0y)D|9r['t2{;X
print "Useronline Delete Failed > ";9^8e}%x#G*a N@
}下面我们解决数据库中不同IP的问题7g;M*h4L flQ(y
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
$T"gG G3Y!a)B6` p(H mysql_num_rows(query);来统计用户,代码如下。
(]N,d@5? $user = mysql_num_rows($result);最后关闭数据库。/S1z(q9q3vM9B dV
mysql_close();显示在线的人数。)h4r5Cw` W(Fjb
if($user == 1) { dg1Hj%b+}
print("1 user online\n");
9G;W;o/A+oM~1b4k H;n } else {
h8E!}#q$V+o8L&aQ print("$user users online\n");
@(V jf/w p!P }最终把上面代码写成一个PHP文件如下。
2~4JvD@xd <?php
~g'JfR,w~l\ //Put your basic server info here i+R1r_*`0Z;u t zv-`X
$server = "localhost"; //normally localhostp+OrB`
$db_user = "root"; //your MySQL database username%U[s2W&y2gS
$db_pass = "password"; //your MySQL database password
?m_?\ T $database = "users";
}9I2HAl D8] $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are&y5sDKPW%L
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
Dt}5b3A'v // $timeoutseconds seconds)
N `d*K^ //this is where PHP gets the timei~'sr4Gk
$timestamp = time();
n6@%` O4w/? //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
0l^ K7w(ae1A(q $timeout = $timestamp-$timeoutseconds;
]h I#rO-[N.WwS S //connect to databasez n,x6lc-h}
mysql_connect($server, $db_user);
;Zj-dB3](Io+D|F,y //add the timestamp from the user to the online list
vAa!I3AI%X $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
S.v*zEiG ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");G(]5?xl_'|
if(!($insert)) {!|/F9e7w L"m iX,N#h
print "Useronline Insert Failed > ";
#cn'M'`;sN.kQ9`"B }aO+p3? hGv
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
Q]:[Im(YD $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");.@PK4|MfZR
if(!($delete)) {
i0SS r%E*` sL print "Useronline Delete Failed > ";
,t9o1S\6N DP k i }e \0W,J1h}d
//select the amount of people online, all uniques, which are online on THIS page
'Q9a E Xp |[ $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
)X`N q:[$d#ZS$~z1F if(!($result)) {liz g4k}
print "Useronline Select Error > ";y{9{%T h|7A8`
}
B7j1]$n/gq2R //Count the number of rows = the number of people online!GwC+gW#r
$user = mysql_num_rows($result);
%dn/jKv0M //spit out the resultsX!L/F C;zt+{
mysql_close();7q,}AWb9X"}?
if($user == 1) {
HIO ?e8UJ/|7IH print("1 user online\n");
1l.g1IN3N5lpH(];{7d } else {f![P$q5ldzI{
print("$user users online\n");k5H0ru|%T}
}:G.B#]W)c-}
?>
)O7m*N&No6A0\7tM [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]JD`5Si7Q&o3gr
以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。RpN/Xw
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一,现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位,产品功能已经非常完善 ,特别提一下几个特有用的功能:数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。%Ic6U*e4d m@
我之前建站的时候选的是他们公司标准商务E型,因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
_~)S)R;w8P;U 当然啦,这两款主机也是相当不错的。O2xzR-[;a |
智强商务B型:Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年2?4A0K+a2?0e
标准商务B型:Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年 U(Hd^:S.P.DgZV
提供一下这个公司的联系方式:请见:[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
H$O_ZU$`.T9k 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]x LPK4^R4t;Mt {
自己加QQ去问吧。

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