捌玖网络工作室 » 电脑软件 » 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

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！
c0J!~e0UGo 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。
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首先我创建MYSQL数据库表。
!s0U yEa5r CREATE TABLE tablename (F\[+c t4B+A
field type(max_length) DEFAULT 'default_value' (NOT) NULL
R+A3v%tI0Vj|u }可以使用的SQL语句。
"pTFn9E CREATE TABLE useronline (I!YmE:L2cK&b
timestamp int(15) DEFAULT '0' NOT NULL, ]4{Z/nJ3G1h
ip varchar(40) NOT NULL,6g$`d4^jf#{4O
file varchar(100) NOT NULL, J0RX`f&I4od
PRIMARY KEY (timestamp),
6a8}CI3uHlX KEY ip (ip),
5V;CwD|}M`6^!cmB KEY file (file)]@9s2S,QN ^`1fu
);下面我们是PHP脚本，首先我定义MYSQL的信息。
QY _SKOs1l r $server = "localhost"; //你的服务器
k5e!}G b-j4{ $db_user = "root"; //你的mysql的用户名
0d+BW.M M f7@0e y $db_pass = "password"; //你的mysql的密码T;?q&?4@,`
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
&Bh+u7Og $timeoutseconds = 300;取当前时间。^bPO AQ
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$timestamp = time();上面的完整代码：
m7k}LX&q~N/dLL <?php
bH4R*y_N,c+~ $server = "localhost"; //your serverS.V,TCx-x hpN-W
$db_user = "root"; //your mysql database username&lY
o qq;N nAZ#p/a
$db_pass = "password"; //your mysql database password if anyc.EOuO6W4P.C7xP7z
$database = "users"; //the db namefCk/d7?0o
$timeoutseconds = 300;//timeoutseconds limit#{%tVs tyJ
//get the current time
$ZU
^Nb $timestamp = time();(oX nM;Z-K;n
//calculate the lowest timestamp allowed
qWyKY $timeout = $timestamp-$timeoutseconds;}$d+c-Z&wT)M:A"v
?>连接mysql0vR4e-R$~|;bQ
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mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
zv2e l#k mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接&E$F#VG!gk2q
mysql_connect($server, $db_user);查询数据库的代码：
fM P4Z'V
i${*Ft)Let mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。rK'rP%Q2q
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES+e{8xF'wQ/_|i
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
`Ja9`[ h 如果用户用错误信息的话，这样处理。
M ]lig7s if(!($insert)) {,{d6`(Pg'rO
print "Useronline Insert Failed > ";!{(r*?.WFJ0~wS
}然后实现当超过设置的时间就删除该用户记录。6Y I\8flB~&W;P*p
$delete = mysql_db_query($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)) {.\T sWt3t4fS2F,sq
print "Useronline Delete Failed > ";
$t3O` AkM$V }下面我们解决数据库中不同IP的问题
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[2W vZ $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
%ef hbN4ndm:`6V mysql_num_rows(query);来统计用户，代码如下。N3[/xq/l8]d v
$user = mysql_num_rows($result);最后关闭数据库。8`3Xa x-@'Xj,Iz
mysql_close();显示在线的人数。`j\(g1Oni
if($user == 1) {
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k`(l5o print("1 user online\n");
q$d*ai$ClV7`*s } else {8th:C%lec,V;rj^
print("$user users online\n");-^9t6G1MUV7x
}最终把上面代码写成一个PHP文件如下。$i;p@(m8rn#{#a
<?php
dw jU(|Z //Put your basic server info herea~u j$b^
$server = "localhost"; //normally localhost
+hjuV%zL_;g Da&b $db_user = "root"; //your MySQL database username
f2~!S#Z(IEQ
$db_pass = "password"; //your MySQL database passwordjm1z0V#N'c2tM
$database = "users";
US/a;ubQ3oT $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
/B8K[_aS#} // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last&WKG\,`T(`xd D0be
// $timeoutseconds seconds)!B&s(? i0H'U_E
d2f
//this is where PHP gets the time
l ^T J)g{'r $timestamp = time();
2Ca7?'c Q9W //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedO9SUB7o,p1?B/`
$timeout = $timestamp-$timeoutseconds;
y q)G#MBR //connect to database5}i1i%Z Y#O oe
mysql_connect($server, $db_user);
)YTN LB G8P //add the timestamp from the user to the online list
w(fl:A8O6}+~F$Wt $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
Q(gs I1K/t)K[1` ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
gjVg+y if(!($insert)) {1V1G/V&Sk
print "Useronline Insert Failed > ";qBc%ccdI
}mZB-f
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//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.m&E P6B-Uv;J(u
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
Xqz%[-hoh0OH if(!($delete)) {)d4[!M8S4@4`A(h
print "Useronline Delete Failed > ";
M5LBNkx7MH| }e/h Ar4l#b
//select the amount of people online, all uniques, which are online on THIS page
f3|Cl6^E $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
s\;yFXBQa @H if(!($result)) {
}0]B8B;J#r print "Useronline Select Error > ";LW yCva
}s2oV1Uh:O
//Count the number of rows = the number of people online
9KCc1Cf $user = mysql_num_rows($result);
\ ou6rXO In //spit out the results
lA,SS4OmP mysql_close();
4Oa)m;}W^;\ H if($user == 1) {dHKW0d5x2O*p
print("1 user online\n");
LE#|9C{N0SW"L } else {

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F%w#m)sq n7| print("$user users online\n");Dc2V T/p.n:`,pZ
}
F [x*h1A{kD1D ?>z*I1JDa4y,N
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
1z)r4vT+e q 以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。
:u,Cs)^$Y$c6l 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。
f'\8c{4t 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。,og_m@ ]
当然啦，这两款主机也是相当不错的。
Q6QC4pm}3^7| 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,~"AE]L2AE)B4n'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
BN^(z6w8i8h&XBXY 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]
#Gp*[|Yt+d 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]
CO#l/_&L-x9` 自己加QQ去问吧。

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