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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!6a6WJo6y#DjX
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。
}+G*@zsS&Q.Cc5MT~ 首先我创建MYSQL数据库表。A5e'XP{p
CREATE TABLE tablename (.w&rFH[_&bu
field type(max_length) DEFAULT 'default_value' (NOT) NULL
%]4yQ/blS }可以使用的SQL语句。
kpb*NA#n CREATE TABLE useronline (U%W%^&tc
timestamp int(15) DEFAULT '0' NOT NULL,
U1fFbZD1D;a ip varchar(40) NOT NULL,!El-[-g{(]H)]H5F
file varchar(100) NOT NULL,F%J8R iaeeu3~0j7G:qh
PRIMARY KEY (timestamp),}nH6M.n%^o*h
KEY ip (ip),ja ]"n:u
KEY file (file)+i7w|f/XfIu E
);下面我们是PHP脚本,首先我定义MYSQL的信息。
9N| ^b_3bU+R` hI $server = "localhost"; //你的服务器
/`%G3_9o(U#M $db_user = "root"; //你的mysql的用户名
x&^#i0L5v $db_pass = "password"; //你的mysql的密码*xOam8O.CH
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)8^IU%N Cv
$timeoutseconds = 300;取当前时间。
U W)F ANv{ $timestamp = time();上面的完整代码:;R@i'J`0vE
<?php_'g$E(YQ$or r2A&UF3f
$server = "localhost"; //your server ZJUPb/W
$db_user = "root"; //your mysql database username
z iI,L%u W;@s $db_pass = "password"; //your mysql database password if any
uR,p6t(js,\ $database = "users"; //the db name/YA$B_&V+k8M/lr
$timeoutseconds = 300;//timeoutseconds limit
.\$Y7uM)mU _5yH //get the current time
+c"@C u$A/c/B $timestamp = time();1Ko BL;hJ
//calculate the lowest timestamp allowed
LC+M I\\2Tf*s $timeout = $timestamp-$timeoutseconds;0[n8tTq&`
?>连接mysqlRnu B9e7ug
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。S3jE4[&Og3KC r
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
N k)Q5{x K,Hhk mysql_connect($server, $db_user);查询数据库的代码:
R"Y9MNy2P:K%x mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。^-`s|/^-p2k
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES0qHKW;|u3hmL I
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");"|g;[xZS4a
如果用户用错误信息的话,这样处理。N$Q,ZOJ:c6~X-dq a
if(!($insert)) {
1R,]Y;Y6|*H?+k l print "Useronline Insert Failed > ";
%[8l+F9H~S ])Wsu }然后实现当超过设置的时间就删除该用户记录。
2IVq)h`yh.u"X9J $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
s W$Ta ]0}V if(!($delete)) {
m M%LvU @ Zr~ print "Useronline Delete Failed > ";]c w2jMv"Y
}下面我们解决数据库中不同IP的问题
@$R*JU @ y$Sx $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
UK'm$[m X mysql_num_rows(query);来统计用户,代码如下。
%v w5p`A{3D#YW $user = mysql_num_rows($result);最后关闭数据库。
u9t0Dg+H mysql_close();显示在线的人数。ox-[@x7z
if($user == 1) {
+Dq4z)`-X [ print("1 user online\n");{%uH}0M"\*nrZ
} else {
L"tyT6B print("$user users online\n");
3\Dl2^U tlx }最终把上面代码写成一个PHP文件如下。
,Gk5h(bD _)k8D2I <?php*U9Vl^cX
//Put your basic server info here!i!l_,}o
$server = "localhost"; //normally localhost
Hn!iJ!c(u+d Y $db_user = "root"; //your MySQL database usernameM} YI:rQdf!oe
$db_pass = "password"; //your MySQL database password vR6V8D%t2xq
$database = "users";
@V m O_Y,u $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
Y |nd?8g9Q#^eY // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last1~!Sy.B1E*v F
// $timeoutseconds seconds);kpo:G~%DB
//this is where PHP gets the time-otV!?S4p^;Eb
$timestamp = time();
yH} S tD t //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedP1h~"o'}1A*w,^)D\
$timeout = $timestamp-$timeoutseconds;CPAfTx
//connect to database*_k$S~$FQ i
mysql_connect($server, $db_user);
q/huJxm(N //add the timestamp from the user to the online listJC|1Us"P
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
d'hc6Su] ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");/v#]{3ZT3M9f#Z
if(!($insert)) {$j-kl3Ifuk
print "Useronline Insert Failed > ";K(| g"dHnGE
}&V Fdpy!AJ
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.d7Bqgu"O
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
F1B+H0_g]!] R#j if(!($delete)) {%S:uj#D N6]f5O/Ib-Z
print "Useronline Delete Failed > ";zA0JjVTs6BI
}
cQl%?(Zy //select the amount of people online, all uniques, which are online on THIS page$]-Po C9NpT
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
+v/G;Z.GF!P w if(!($result)) {
-U%C2fi&E*bRx print "Useronline Select Error > ";/RdJ&To
}L o\A q.F!o
//Count the number of rows = the number of people online
/K EB"KG8f1V+L!W $user = mysql_num_rows($result);'pF Q;EH;h!K }(_
//spit out the resultskc#^ Qi
mysql_close();
Oux:n KEJ&p v_m5c if($user == 1) {,p$E:Xg4KCb3hz
print("1 user online\n");
W rO/h3m } else {wOE7M0U@N"F
print("$user users online\n");W-]8X!n j!]+a
}{ v&H*_;HEflH
?>eVh D5M`w.w.W
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
6|zH+~$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。_ b[ZHp%_G#a#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。
%c'~,@&_JYnBX'c 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。
5J)m+GIW[ 当然啦,这两款主机也是相当不错的。 oy'xX.]L]%R
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
0h7L;~9Q1Gih 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rjM g(M1t(mo
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]
,f`8c(KvGD 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]#Q_ Lx0ov~5l~
自己加QQ去问吧。

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