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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!1u(`,N'r'K4J
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。
7G#i~*c M2t 首先我创建MYSQL数据库表。
hL.X;|_!e3gUz CREATE TABLE tablename (
5yPnU5[ Z2P4rd/{ field type(max_length) DEFAULT 'default_value' (NOT) NULL
5Vl{d[d@+V9_ f]+CZ }可以使用的SQL语句。 [3k8C#tG:JY'd&~
CREATE TABLE useronline (
:\D)vB:Y3h timestamp int(15) DEFAULT '0' NOT NULL,$SN,t._~R%K6i
ip varchar(40) NOT NULL,"l7Yq\6|d*`
file varchar(100) NOT NULL,
c8j@R;I? R^n S PRIMARY KEY (timestamp),5s:yM.Xqy
KEY ip (ip),CM6w1Af's
KEY file (file)
`u _/b` );下面我们是PHP脚本,首先我定义MYSQL的信息。 s@6|/W:nk
$server = "localhost"; //你的服务器#DNO ]2XN/zPvZ1^
$db_user = "root"; //你的mysql的用户名
E3RU7K'K3E$s%m $db_pass = "password"; //你的mysql的密码_W9CQ g
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
U#K'cf-L $timeoutseconds = 300;取当前时间。
$T2qH Q&V&T8KX $timestamp = time();上面的完整代码:
dm&}~ f q&j <?php
8p g$J!]5TO-ARE | $server = "localhost"; //your server&Jp.y&K,~b*YZ*vq
$db_user = "root"; //your mysql database username
t2gh%w*y#B+YB $db_pass = "password"; //your mysql database password if any
$N$de\{ $database = "users"; //the db name
.o qN[$E2Kd}6W $timeoutseconds = 300;//timeoutseconds limit
%B&C1~(u*Y*JN //get the current timegy2Y`lWx _
$timestamp = time();
6C2az,["n //calculate the lowest timestamp allowed*m;]:g Q/N#vY3`/N
$timeout = $timestamp-$timeoutseconds;1JTj;J^
?>连接mysqlu:q7nD?b3S*V9KHi
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
$rprP$LJ`$\ mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
bVY p!K mysql_connect($server, $db_user);查询数据库的代码:o6dH j]~1bm'D
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
R,b;X2Vo6l:LZ\(cYO $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
\Pi1a@7D2\Y#J3I1` ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
3Cz VR4OaLIn 如果用户用错误信息的话,这样处理。d,yq'e!^:dE)rgP
if(!($insert)) {5h8t1g)v$F)~k%\)j/e T
print "Useronline Insert Failed > ";B,c!g2Tm
}然后实现当超过设置的时间就删除该用户记录。
W[9^:tj+s%_i $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
g-T$D.x%W%i if(!($delete)) {E`&y z%h!l
print "Useronline Delete Failed > ";0]r }1~ N6LzBoIV
}下面我们解决数据库中不同IP的问题
'`$N ]s9D1Xi(d $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
n p}-\m{x mysql_num_rows(query);来统计用户,代码如下。^"Em"u_zkm
$user = mysql_num_rows($result);最后关闭数据库。
#h&|Lp4n.PI mysql_close();显示在线的人数。my D+Ykw Cxh1j
if($user == 1) {
nX C2G'm&D print("1 user online\n"); [6J F#k-Yp4oU9\!R
} else {
&p1jQCZ:e"XW print("$user users online\n");
NQ4Z#q_v"T }最终把上面代码写成一个PHP文件如下。"B e#A\kpE3a4?
<?php Q6d \n|8Rm0U(iM
//Put your basic server info here
_J2[&Y$a] g6v\ $server = "localhost"; //normally localhost
Wqa1c ZC k$RTd;w $db_user = "root"; //your MySQL database username
3i{Co.aPsT!| $db_pass = "password"; //your MySQL database password
6na_xQ1P6y $database = "users";
EU'^#K{3^I2sUg $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
lERVbSD // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last;qfq#T)MbE%O ?
// $timeoutseconds seconds)S ^*m,aD9F\
//this is where PHP gets the time
#l|-Z|7L{W:d&c $timestamp = time();)n^f(EomL
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed)?xro?%sSL
$timeout = $timestamp-$timeoutseconds;vC ri(D4oHU
//connect to database8y1{J5vZk
mysql_connect($server, $db_user); K5l}Xf`a
//add the timestamp from the user to the online list!S0GQ2W-t0q
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESQI)G8LL)K$fDl9Q
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
8v lMgKT&b if(!($insert)) {
;[;Q4K(xXD7w;` print "Useronline Insert Failed > ";
-{3}#j9C#H7Cb.D5C }K:D B"J-F\:{(wF
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
BD_~9K#iy0O $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");q UO:R1OPtR
if(!($delete)) {
5uPiK/t2W;bI print "Useronline Delete Failed > ";|%W"G4knX~
}y3X;D*nq-K9DO
//select the amount of people online, all uniques, which are online on THIS page6`xrP [5\j^.c
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
$q|U(g#t a D if(!($result)) {
bygh o Iy9~ print "Useronline Select Error > ";/_nJQ1W!v
}
:Rl#jq%A \ //Count the number of rows = the number of people onlinem!|m"r(D
$user = mysql_num_rows($result);
'u"y@(J&Z //spit out the results
CEKf!dJ"H8q-?9` mysql_close();
8} T9U+V ~3dY if($user == 1) {
?FL.{5WK print("1 user online\n");M4u M&Mp~s{fR)p
} else { \f{!eB7K J9f
print("$user users online\n");t5}%^(V*r}
}#}%@3_.|5L-A
?>`.mG2kL I
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
r rZ t,@,D#M{$g:M 以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。'T5L!oS0S-bH ec-p2V
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一,现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位,产品功能已经非常完善 ,特别提一下几个特有用的功能:数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。B6s{B$x-RV%fYDd
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'` K4CWS] 当然啦,这两款主机也是相当不错的。 X6]*jq)a0ER%~e
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
3A,~(M_J#zPr 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
k2Flc\;Xo tSW 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~$n7m8r,j(J 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]_ P7zd@q
自己加QQ去问吧。

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