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！`S;E f b+P5^1u-H8Q ^u
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。eg+Cqv[ iF*O
CREATE TABLE tablename (:Bf(l)j&n
field type(max_length) DEFAULT 'default_value' (NOT) NULL:K~0qm#n6H
}可以使用的SQL语句。
CREATE TABLE useronline (F%i Qk![$`_
timestamp int(15) DEFAULT '0' NOT NULL,$]*dHO:N|%P;p
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp), L8DVq/cAw ]
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。_5u?YqZs4}
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码VRQKvF#F9v0?%_
$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。
$timestamp = time();上面的完整代码：1} @[9O{0@h
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyF%Tc4e6ia_,bu{7}
$database = "users"; //the db nameSu0OC&jEj%eRM v
$timeoutseconds = 300;//timeoutseconds limitQ[#m.W9q eD(bFz@JG+d
//get the current time
$timestamp = time();6~7tr @ex
//calculate the lowest timestamp allowed x3{%u}Tv
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlk i r-|5kN
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接]:m9{7DGMbJ*S
mysql_connect($server, $db_user);查询数据库的代码：_I,H SpCT7|*v(hM
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。!ZAh8|s
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。e1r(x x.\d tc
if(!($insert)) {i'T(d{'FYu
print "Useronline Insert Failed > ";\2^"O2Xhl ]
}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<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {
print "Useronline Delete Failed > ";~_z0K+[ yd%y
}下面我们解决数据库中不同IP的问题0|Z6z&]4Ei0gc~
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用6~i/RS?Z/b
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。
mysql_close();显示在线的人数。
if($user == 1) {"j/jz@N6Lk&]2e
print("1 user online\n");mda:h K l
} else { CpI,wFO#dCpUo
print("$user users online\n");XuSOy
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordP2V5y,q.f
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are(G|:Jd&T6v
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)N~Mdm d
//this is where PHP gets the time8[D*azq?
$timestamp = time();jV2H:J#SW2x-DU1bOH
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to database&Nuh)l i&aC7^
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {zwr7e3@
print "Useronline Insert Failed > ";
}*^Rs5W!n:Z)ssCd
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.$rm~T%eE/b5l
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {EX(k2`s$p2z7u rL*`
print "Useronline Delete Failed > ";
}0A:?.Ii/st-@D(wQ
//select the amount of people online, all uniques, which are online on THIS page
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); ?X1YH K5LX)B9@7t$H
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);t r2zEF
//spit out the results%ewZ7?c'H
mysql_close();
if($user == 1) {j V&Q(C6rjp [
print("1 user online\n");
} else {%{I}Y4Ke^(J*k
print("$user users online\n");
}"AMg+K.[V;GH"|5g
?>
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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。2C-z.gfj#I u
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。i$?3rrU4LA
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
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] ;bI U-da0sM e9?
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！