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!%bB+K8F [8{_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。*n[qFfrFxy,~
首先我创建MYSQL数据库表。pZPo!xr
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (oi| J7c o4@8i
timestamp int(15) DEFAULT '0' NOT NULL,WLoru!qA
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,aG}o4w+@
PRIMARY KEY (timestamp),b7a9B6f(pH"~#Gnwa
KEY ip (ip),,S6o{*u$\"IA^
KEY file (file)
);下面我们是PHP脚本,首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器T'C{/D2sr,V^)@
$db_user = "root"; //你的mysql的用户名;D+~1IW{!QXb'i
$db_pass = "password"; //你的mysql的密码
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。&YdG8g+h4m`?
$timestamp = time();上面的完整代码:
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database usernameTC:H'P3k"_t [p
$db_pass = "password"; //your mysql database password if anyV#A!p3qc0E(?,?
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time?$PMj[?7c
$timestamp = time();3K/c[+e[[A*f
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlotM;F JK u
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。&W}"^l$K-aj;t7U2P
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($server, $db_user);查询数据库的代码:0W,VG;E+q~5\ ys
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。U_2B(uz
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES Em`/ZM7St@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");:f*V%Gr+j
如果用户用错误信息的话,这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。]N.UD6FF
if(!($delete)) {~P$l}/O^
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用.ZPe&bv8m&OwN
mysql_num_rows(query);来统计用户,代码如下。
$user = mysql_num_rows($result);最后关闭数据库。5x0Aj{h!r.k
mysql_close();显示在线的人数。]H ? SQTv~E
if($user == 1) {
print("1 user online\n");Z)z"jj/X,P|/p c
} else {#J7`Li^e!n
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php f:mIB,?8c {
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username*Ri\ Z r4Q4G6MP
$db_pass = "password"; //your MySQL database password rlKC&C,f~a
$database = "users"; j @r*Ua/L
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)
//this is where PHP gets the time
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;E3d}p4{
//connect to database v,E sI"Q U.?:Qv
mysql_connect($server, $db_user);fm,Ni%O+n0o
//add the timestamp from the user to the online listYRh$A6b
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");,T]3h5X['qt5e)L a
if(!($insert)) {.`:w m0C0L/B3y5TF
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.5Sd2r9ne9U%T
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) { og0YtO+or
print "Useronline Delete Failed > ";*c`$pdU&y.hhW
}
//select the amount of people online, all uniques, which are online on THIS page,h?M;T1at\ NJ
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");m c0I&bMUAJohvb
if(!($result)) {4b-U:D/V7r9Ux
print "Useronline Select Error > ";7KZg(G*`P@x
}q,d$T;p%C(R,x
//Count the number of rows = the number of people online.t WuU:{
$user = mysql_num_rows($result);"iK7z7z+}+e
//spit out the results^hQ2N?*H{"]
mysql_close();
if($user == 1) {hM HGC~w
print("1 user online\n");M s+?tZ3iP
} else { N XL\z*P
print("$user users online\n");^.^k+{fmV
}0X_+S0h-]7{
?>/~0zd(@'~3P
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]di)Wu \"r?
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。
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。6ZGRDKF;q|/o
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。
当然啦,这两款主机也是相当不错的。F e8nfC[];u
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
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
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]
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]$f$PIm K@
自己加QQ去问吧。
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