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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!
9uCj5p#G|,Z'W 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。
#NMZz;fE(O8TJ#Tx 首先我创建MYSQL数据库表。+p(xh)lap
CREATE TABLE tablename (
O8[ ^|2TX field type(max_length) DEFAULT 'default_value' (NOT) NULLt9Q { }bR]
}可以使用的SQL语句。
5nD[B+g/f$t CREATE TABLE useronline (
5Q9i$J"`uD+|k timestamp int(15) DEFAULT '0' NOT NULL,duO)qm+S3t!SE%n
ip varchar(40) NOT NULL,b,~ Q.e^"^%z
file varchar(100) NOT NULL,}*wCk o [
PRIMARY KEY (timestamp), k8Zt1Kg K xQ:P
KEY ip (ip),:IA2\'`k(GO
KEY file (file)
#pR+Mm#|s#CR)I/h );下面我们是PHP脚本,首先我定义MYSQL的信息。b _ {bk,p
$server = "localhost"; //你的服务器7Yt};N/W
$db_user = "root"; //你的mysql的用户名
:R%bvqL:Gwi $db_pass = "password"; //你的mysql的密码 R,^,ON&eA"H? `
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)fuVTUN8H?3Fs
$timeoutseconds = 300;取当前时间。aJ*{|b0j
$timestamp = time();上面的完整代码:gw,B-H7h.uN
<?phpg1^+Au;Dw
$server = "localhost"; //your servere^b K)H j4Y2q
$db_user = "root"; //your mysql database username
'q!v4{+}G2zdj $db_pass = "password"; //your mysql database password if any
iD3x$D0W vD/N4U $database = "users"; //the db name
B"gnM2LZsR $timeoutseconds = 300;//timeoutseconds limit
\!V'X/@/O:S-i //get the current timeg&v`y:g#i.o%U;T
$timestamp = time(); g/pak"E` f$}
//calculate the lowest timestamp allowed
DL I~$TT2h pN $timeout = $timestamp-$timeoutseconds; M@ zj5w#GH A
?>连接mysql
V-YI7]OQq mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
t!Z Ma EV Xn\Z a mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接(q^V9s0F!l-Wc9D
mysql_connect($server, $db_user);查询数据库的代码:-}bJ&V0x,Wp)e5py-VU
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。q!D@Y4DyErx j
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES+A*b+pLb T%d!AZ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");"w|C1c}B!Q.iT
如果用户用错误信息的话,这样处理。v!h7QC2A
if(!($insert)) {H_~Y&p-LPI
print "Useronline Insert Failed > ";DStTUQFz!CC
}然后实现当超过设置的时间就删除该用户记录。8x vzk2eGc
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
8{&~6G*^ Sq6hx if(!($delete)) {
"S%b#X1B [6g print "Useronline Delete Failed > ";? o?i ph
}下面我们解决数据库中不同IP的问题
scGA+e~HG)q+M${ $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用w5hc(oM,z d ~
mysql_num_rows(query);来统计用户,代码如下。
E cr!mz6b $user = mysql_num_rows($result);最后关闭数据库。
vHnt-HWP#?$u1m*A&Zw mysql_close();显示在线的人数。
2i#p wlJ1{(l;b if($user == 1) {
UR4r5O SW print("1 user online\n");
,{9tP[wFqj } else {2a"E~%ov3[j
print("$user users online\n");
qg(x5Qt/k$D`3E*s }最终把上面代码写成一个PHP文件如下。
d(Wj5B] <?php
P[`|?t //Put your basic server info herehX3`uH|s:I%J?
$server = "localhost"; //normally localhost%K+ztD$t
$db_user = "root"; //your MySQL database username
v^.j4L2D"He $db_pass = "password"; //your MySQL database password.\ np^s{0Gonh
$database = "users";
#c!Q*]s r,p,S:O)a $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are*sB;`,P![(R4c]
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastS QjT L)Q b
// $timeoutseconds seconds),jg~%]F ].H5~8],t f_
//this is where PHP gets the time
&R9X4R4_rR~ $timestamp = time();
8t6U;KJn*k"[] //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
8ybj1U4^0dbv&O $timeout = $timestamp-$timeoutseconds;
Cq"E2d7ub //connect to databaseG6j c5s'JY)Lz:b
mysql_connect($server, $db_user);Tu'F&EGRZAG
//add the timestamp from the user to the online list
%t;Ee l%pK2GB%qP $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
P z5Q(kV!A*v5V%U ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");4x"l?9OK'v.S%Vq
if(!($insert)) { Z'wAu$mU a
print "Useronline Insert Failed > ";
2p$dk&Ps]O!`:n-Q }
[kJ$g P4y'v //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
vuy9zNx $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
{xE&V0H|%`}N if(!($delete)) {M sp C!^-S
print "Useronline Delete Failed > ";
F;i7t5k3u }nZX't4T`'K/U
//select the amount of people online, all uniques, which are online on THIS page)Pn/O(`,\,OGx
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
*W {.}:hKF if(!($result)) {
/@zm3[wIU5R~%x print "Useronline Select Error > ";
X-l/? cp }
3^5B[(L l IR //Count the number of rows = the number of people online1N? Cb;Ca
$user = mysql_num_rows($result);
C&F-d-}g8r3W*I //spit out the results6H&jj,P"J n;}Ge6s+b v
mysql_close();M9j5u;a2M@$P we I9w
if($user == 1) {@%mR/l&y
print("1 user online\n");Y6UfJ0O!g
} else {q1q4?WxO CY
print("$user users online\n");
PV{%vLf$M }
^7\/y#V2u o2^M J ?>
Ce/gt](o1R#uIU2| [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
,O8L(K]GR 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。
't(M0\&d ?R os5\ 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。 V%quiF4P
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。
}Q[wB P,s.\ 当然啦,这两款主机也是相当不错的。
*qO+M^XI/u+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&I g(HL;]9U
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
hf$H4F!L 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] 6w!K} ?qmQ
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]
!dMq4l8X@!` 自己加QQ去问吧。

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