刚用PHP写了一个网站在线人数的程序，请大家进来指点下！(页 1) - 电脑软件 - 捌玖网络工作室 |网页制作|平面设计|建站交流|代码资料|建站教程|主机域名|asp、php、jsp代码|网站素材

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！D&o iO0Q!G}
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。
首先我创建MYSQL数据库表。m0|k(ng(?] w h7ov{
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLC2KNdo?J
}可以使用的SQL语句。
CREATE TABLE useronline (z1osd7HTi{
timestamp int(15) DEFAULT '0' NOT NULL,G)a~(o u"LM6l^J
ip varchar(40) NOT NULL,l,luPiEE
file varchar(100) NOT NULL,fP V1Rn"w^nt:y_B
PRIMARY KEY (timestamp),9D rHWUK
KEY ip (ip),B)N.Ay\%r};X1\
KEY file (file)3Om2QE`7Y
);下面我们是PHP脚本，首先我定义MYSQL的信息。{bT1Y jq g
$server = "localhost"; //你的服务器 G,i&yE)i$m6e eY
$db_user = "root"; //你的mysql的用户名
$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)Z,[T^ad3k6L\
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?phpFUP8E0a$K]v
$server = "localhost"; //your server`Z n!Ra$J
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time$RT,x`^({
$timestamp = time();d!m3\ C%vDc;g
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds; Fv@_zE/f
?>连接mysql,VKNs3k3R wGj
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 mo/Z|j0D&M$w
mysql_connect($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：
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。T2lsch?3A"R
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES(Z7QL5Fo'[{1R'\1N+f%C.yU
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");kX?&O1v/Pw)Ag ^
如果用户用错误信息的话，这样处理。q&Zg1VB&w+p `
if(!($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<$timeout");同样给出删除记录出错的处理。){_6n"lF7x;eIz3A
if(!($delete)) {T S!r9|8i~s-nD1T
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='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。;_$bnm9w ?
$user = mysql_num_rows($result);最后关闭数据库。RMr^~qG
mysql_close();显示在线的人数。
if($user == 1) {E2@p,T E#|
print("1 user online\n");
} else {1A5G],M{ce(r){?
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。VC:E;dZ juC4G3\
<?php [uN6QH}x,l|l
//Put your basic server info hereOE0`&t%H E w%X}
$server = "localhost"; //normally localhost!\9b,FH}.j$`
$db_user = "root"; //your MySQL database usernamen F+c q^_X#_Oz]
$db_pass = "password"; //your MySQL database password
$database = "users";o3c#CccFCp5DI
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areX-EG7y"K&cKmM"Y@
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last3|e3nPYO3l!Fu
// $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(dHFQ"i'[
$timeout = $timestamp-$timeoutseconds;6L1h;Q4xvX,O%^+\9M
//connect to database
mysql_connect($server, $db_user);g*xK(y*Fp.G-F*NJ
//add the timestamp from the user to the online list[qq6D+P k:D(M0t
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {i6h? CD2w|,`K[
print "Useronline Insert Failed > ";7|;OC$Bn,UB
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");D*W(n~ |&Q/X)r
if(!($delete)) {c(t3e [)|I1s)i`
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page!hC:tP5cS6vZ$Fh
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");6X:c+X%tpOe Z"n
if(!($result)) {aE t S+eH.l:{(|
print "Useronline Select Error > ";.kAls}wDF
}*JM%V|Eg,J
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}3k%XmW^%?-B6P7z0D
?>!L IY L"Cf)~:~
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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。
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。m.B1pj K
当然啦，这两款主机也是相当不错的。
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 @g~D~@8}0N%k.F
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e,mj;tH&k
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]
自己加QQ去问吧。

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刚用PHP写了一个网站在线人数的程序，请大家进来指点下！