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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!
$k\/^?9M F7G)j'X 我是用PHP+MYSQL来写的,原理:网站在线人数的程序代码+后台有MYSQL数据库支持,可以直接统计出网站当前的在线人数。W5s3e(N-|
首先我创建MYSQL数据库表。
]9\+C*ym7O'Mz CREATE TABLE tablename (*l!QQ$]oo ~
field type(max_length) DEFAULT 'default_value' (NOT) NULL3N'k+h2Fr
}可以使用的SQL语句。
d1d.v,Nn:y@ CREATE TABLE useronline ('hm N!s7{
timestamp int(15) DEFAULT '0' NOT NULL,
{jS ]h sh Z [-M dU ip varchar(40) NOT NULL,
O0E'B,VjS file varchar(100) NOT NULL,)e]b/QV M
PRIMARY KEY (timestamp),
r,f6wd(vl0yJT KEY ip (ip),
*`V9yGwh{2a KEY file (file)
.? Ns&A8F6F2Mp {4aIe );下面我们是PHP脚本,首先我定义MYSQL的信息。
i2E"Sx xCX $server = "localhost"; //你的服务器D8XCRD4y*w(r
$db_user = "root"; //你的mysql的用户名
h1v7LU"Ma{m0mA $db_pass = "password"; //你的mysql的密码!I \O-D8{)F8S0}+M$r
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
aK*qT.X,[e $timeoutseconds = 300;取当前时间。|:L~)F'ud
$timestamp = time();上面的完整代码:
#Uf*@H3J1Jt7e <?phpHy+?$t'd c?;rP
$server = "localhost"; //your server
g6`"|\ d[ $db_user = "root"; //your mysql database usernamei$[+qB z X-Ag9]D
$db_pass = "password"; //your mysql database password if any d;?0B)AF TL
$database = "users"; //the db name
$~\G n.iUOB2G x $timeoutseconds = 300;//timeoutseconds limit}L EGK3M4{E
//get the current time
.G3? w?8g!P5_ p)h3ZS $timestamp = time();
%I{&Ss4GiIDC%Y$q //calculate the lowest timestamp allowed?"}"Fiz,wz"V;F
$timeout = $timestamp-$timeoutseconds;
$w&Aw8{yN j @l hr ?>连接mysql
#dyH.]4V Yg kR mysql_connect('localhost', 'username', 'password');也允许使用变量形式。V\0qX C
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
~[5F$h/S4]Guk4e mysql_connect($server, $db_user);查询数据库的代码: } Az9hdZ|2B
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
;X"G[+|}!Zh $insert = mysql_db_query($database, "INSERT INTO useronline VALUES;RhQ h U:G6XK
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
SU+tV ?"W` b!@ 如果用户用错误信息的话,这样处理。 A9o-W u!n5y0` |
if(!($insert)) {$p Dq M\cST
print "Useronline Insert Failed > ";
)k4Td$m4I~FZ }然后实现当超过设置的时间就删除该用户记录。
#A(zY/X)^ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
RJ5v_1oM if(!($delete)) {
H/f3V3s M3k4r$?!@V print "Useronline Delete Failed > ";~%kG;[m JCA
}下面我们解决数据库中不同IP的问题Ot clP'L {/zW
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
.d&B$zk*WY1a)q/A)? mysql_num_rows(query);来统计用户,代码如下。
2AB]FPp1s h $user = mysql_num_rows($result);最后关闭数据库。
1iNH+t3}P o&}s#nF mysql_close();显示在线的人数。 l0oc)Y1vVF
if($user == 1) { Lxq'u~;I)k'r A
print("1 user online\n");
,vN^x c } else {
)D/F2~ w+_kK+Jz D$h print("$user users online\n");B/__XZ P
}最终把上面代码写成一个PHP文件如下。
2ko;ak*Z V`5o$^ <?php
+B#j @ m(Gab //Put your basic server info here
)l+j#X9_8G| $server = "localhost"; //normally localhostbU9Q;Su.zE
$db_user = "root"; //your MySQL database username
2Zt!J+^*es E(p $db_pass = "password"; //your MySQL database password_x$Vc7_aE%T
$database = "users";
8D+Nc,hs0Y $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areV2B V ~_ F3kW1@
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
"k(u"`+V:m0F'u // $timeoutseconds seconds)
ImlT@B j!G //this is where PHP gets the time
~#V)g9K+} q $timestamp = time();!kX YS5`Q
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
|xj*LV(wJZE $timeout = $timestamp-$timeoutseconds;
M3A8O.o0t'gSX5`-F //connect to database
R2W_0R'ddK9t!bk mysql_connect($server, $db_user);Ot| I4C@
//add the timestamp from the user to the online list _/]b]Tb^B]
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESA0}#E'x+xA"Gq
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
UpcE0x(X{ I if(!($insert)) {$Z y!mng k @p t^K0?&dn
print "Useronline Insert Failed > ";
G*S5m1AD K6z }
2lFW T5il'l //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.O0cZ/R#J ? f4l
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
,uT"sI`+q if(!($delete)) {
9X)@NTSz3U;et^ print "Useronline Delete Failed > ";
E4|J+m#Pk0Q }%c4djDb6}c({X
//select the amount of people online, all uniques, which are online on THIS page+xO.rK7] O+G.h!UtZ
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
\3q7y_%Ad9[m if(!($result)) {-J(PlS hp5k
print "Useronline Select Error > ";)hviy#KQ9[,O
} C0Cs&Ds O2a.~Y)n O
//Count the number of rows = the number of people online K3Q/Chh`)l
$user = mysql_num_rows($result);
oJm8Rl-g:o9g //spit out the results
r!f6| M7@4_V mysql_close();,b A ["n? Z
if($user == 1) {
6s-`C ~/|.po print("1 user online\n");7XD}CK/F
} else {
/y$tx:\N)sL'C print("$user users online\n");j3v%l ?Psao-w
}
qoS|5U9m,|5S{ ?>
,K E+J,i&Rt| [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
YK,Hw&B.A"n\!U 以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。-|]3C_\:wg-?O$k}
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。
!JT2gm(l Ia#`!n!@ 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。
B0Nu`!Q5k P.{(Ws 当然啦,这两款主机也是相当不错的。 @,D-Dc |3d]9q
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'|5b'n2e-j?4R
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
1|$e G.?Y.a[!x2@ 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]
J!Gi-Q~K}0P 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]"u2yA(Y#zq5D)t+G
自己加QQ去问吧。

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