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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!
U!Fu B9x 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。:^-M!_'i0MPn9AeF'o3q
首先我创建MYSQL数据库表。
[ ]`2mQ-?1c CREATE TABLE tablename (
1Bfi2`MPuAE.r;D field type(max_length) DEFAULT 'default_value' (NOT) NULL\`,M~)a.j
}可以使用的SQL语句。 B,S-B_a
CREATE TABLE useronline (K~F-o!q(Dty
timestamp int(15) DEFAULT '0' NOT NULL,8MVhr?9oft
ip varchar(40) NOT NULL,cm {)k`#_N!z8D'r
file varchar(100) NOT NULL,
W Dha._K)]4K PRIMARY KEY (timestamp),
1] q9_:]7q#@5Mg KEY ip (ip), Hc yg Ug
KEY file (file)#_+Ee.C%h;|W&e p
);下面我们是PHP脚本,首先我定义MYSQL的信息。m~G7D/|/c7ttT
$server = "localhost"; //你的服务器Y%E0R%~2\t
$db_user = "root"; //你的mysql的用户名
)n6qgq1G Mk $db_pass = "password"; //你的mysql的密码
ZU-U&v f'["a $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
#k.QNz(xS)]X0f $timeoutseconds = 300;取当前时间。
7c"j:c5p A7A#n.Z $timestamp = time();上面的完整代码:
U0`t)x gl9y0o,DE*P <?php3GYS"~.R#?
$server = "localhost"; //your server
wW|e D/t $db_user = "root"; //your mysql database usernames[Add(M%k
$db_pass = "password"; //your mysql database password if any5N{,{T$de7m?r i
$database = "users"; //the db nameb^6P1CuCAI
$timeoutseconds = 300;//timeoutseconds limit
;OnK{}$w //get the current time
-Q\ y(P%nqO $timestamp = time();
%^ ?:X:u(l9x}4n //calculate the lowest timestamp allowed&AeROOQ2E
$timeout = $timestamp-$timeoutseconds;
xBP5nW ?>连接mysql
E'b0Iz Rp(I mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 d4c"rnKu
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
w2o*IH%E*vj9` ~ mysql_connect($server, $db_user);查询数据库的代码:
i;jAgx&[f_2h6E mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
WBJHRmb;CF $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
d(L3uh I/Ik"H ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
P#ehvP(TW.s 如果用户用错误信息的话,这样处理。 {ia'A G f[1p
if(!($insert)) {
1]{SO~ gF$C wC print "Useronline Insert Failed > ";7d8fE'[)Q
}然后实现当超过设置的时间就删除该用户记录。
r?'Y!r+Po9cgl $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
%W;h3V,U:Z5R if(!($delete)) {+rCF;a)mra-S
print "Useronline Delete Failed > ";$b/`o K)Ql0m%E"?
}下面我们解决数据库中不同IP的问题H|(_w]M&u,W
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
$NZ7Vy0a~7qL mysql_num_rows(query);来统计用户,代码如下。-p+t.b:|^5[]7L
$user = mysql_num_rows($result);最后关闭数据库。
}fX1F|H mysql_close();显示在线的人数。
q,ju,A7z1q:b{ if($user == 1) {6HA"Da(?
print("1 user online\n");
\Kzt-G,l!sm+F2k } else { XwHx?%~_1q_u*RU
print("$user users online\n");
@3Yg N'i!_ }最终把上面代码写成一个PHP文件如下。
2LS-j0\3S6s3E*rpU <?php.W*O YL#^8na.g
//Put your basic server info here$B^VU-R `:sA
$server = "localhost"; //normally localhostx3mA9Q-w0t4c
$db_user = "root"; //your MySQL database username
3N D!c O0I8Q $db_pass = "password"; //your MySQL database password
2F/L NB0^h $database = "users";!r#e o6\Q$j ?M
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
Ex,mN:V^5AIE // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
K;U7BL,m // $timeoutseconds seconds)
'tYs(j5iB6fh //this is where PHP gets the time
oK(jOe$? $timestamp = time();
[n%S8M3ZUw //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
f^ jty df)gJ $timeout = $timestamp-$timeoutseconds;
F ez-W%l\)H s7x&F //connect to database
*Wc r%fY/fq mysql_connect($server, $db_user);
'gG6U"L&k m;O //add the timestamp from the user to the online list
i~7MyG $insert = mysql_db_query($database, "INSERT INTO useronline VALUESj(p[;|tW:x2^4n [
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");&~B EE4QC5r4n&Z3zDy
if(!($insert)) {s6OY3M,p-RxQy
print "Useronline Insert Failed > ";
9ysO,`b ]CS a3o }
J+et5^"t"c //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
!N@&N,q)v $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");`.`&ra,_$P Q'i
if(!($delete)) {]6T2U&t2N4|#|P
print "Useronline Delete Failed > ";
%X#PMg]*kl Z }\&[,UEQ3Zm(o
//select the amount of people online, all uniques, which are online on THIS page
PA6} vk $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
A{-b q6o5e r if(!($result)) {
,z$O6T1n,m9t print "Useronline Select Error > ";
)X F4x(OC }6Hm*]'m@5L l%N
//Count the number of rows = the number of people online
c8Lj4@2NQ5]/n@5V $user = mysql_num_rows($result);
'HyXz Tp$@ c //spit out the results
`P7^s YMt)S.r,r mysql_close();
S `*\#i%w5?8we if($user == 1) {s}\uT6N1R J `kc
print("1 user online\n");
/m}~;HIP4w } else {
ns-[)FG N print("$user users online\n");'Hw1H yZ"x
}-OvR D)r2K-J
?>-eS@,U Y;L
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]1^4L Xt*f9M$P
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。
&V#?;qP2yIp)^T 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。%t"bX#es!F,kA
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。
.e]}z4uG(FJ 当然啦,这两款主机也是相当不错的。2led3YhXBQ
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 Q;rn+U+XB;G
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
3R'yk8ib Y%S2o 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]
g)Mn.Y4r~8n 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]&WCH)]Hn
自己加QQ去问吧。

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