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！M |nrc u-e1`
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。5F~m1k%`Ark7L
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。3uC&zAqxs L
CREATE TABLE useronline (2c#fBRf+x9m
timestamp int(15) DEFAULT '0' NOT NULL, I0Z LQ+u Jy$txv
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),:we+S aP
KEY ip (ip),x-d(w,Sh
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\.P&~ ?h(e
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码W4y(q|4Yj6N!B2f
$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。FW}D7Z6T'j
$timestamp = time();上面的完整代码：
<?phpMZZ v.r(hN
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any7b8^2^JO
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit}fE#Y5| o]
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowedg[ F8Y%vqV#N:G G!b
$timeout = $timestamp-$timeoutseconds;k ` h]3Mc
?>连接mysqlDIk!g/V&Pm|m
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接WIZ9M&E
mysql_connect($server, $db_user);查询数据库的代码：Y8f+b0qI'uR
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESKr'Xr:?(x&d
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");R/EzH1P4~8ZQ
如果用户用错误信息的话，这样处理。
if(!($insert)) {WO;u$@U} nO
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。9X8orIQ(gVy,L
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。m0K.UxW
if(!($delete)) {
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。|AkCQba
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。GJ&A#me |`,r
if($user == 1) {
print("1 user online\n");3yc'{_\7_Z
} else {:PhHU As
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?phpGds;y VW
//Put your basic server info here;[-@8[6y_t7H
$server = "localhost"; //normally localhost%SYk^1x}
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password7P` x*Xe5x
$database = "users";*I9y8]c[/UQ8tq
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are7w wi8Q&{l7f&q]fPI
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)/c$P&].v])CG
//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;
//connect to database
mysql_connect($server, $db_user);4u%Bfo,e.|zc
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESk MJ$R!D$i0s6V
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {6]f6yR3f4b
print "Useronline Insert Failed > ";(u6C?z7|l
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}(?.lC6Xn,QF
//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='".$_SERVER['PHP_SELF']."' ");3a,T'n L FQ
if(!($result)) {J&QG/I@oU0vJOK
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);+n&} Ta9W(@"]A9r)U
//spit out the resultsuBe FR+X
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}}BmG,Nq
?>
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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。 X\7\@KCx
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。N"V O+L.v1[0e
当然啦，这两款主机也是相当不错的。%~V4Un,d
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"R/{xo$b
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年6v3oYNwx G,y cG$R
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]#P gIiYj)C#ktr3g
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！