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！%aZ4Xt?e
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。5DRGe v!Ki*a6H2m
首先我创建MYSQL数据库表。'iE4F;B \ ~ X
CREATE TABLE tablename (!`%x#b p9\,a
field type(max_length) DEFAULT 'default_value' (NOT) NULL:\C)?+nt#qR~]
}可以使用的SQL语句。
CREATE TABLE useronline ("I ZY Z3aqz H$Y
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,o+Sq"P|1m-{GP?
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),4t,ZvR%~_
KEY ip (ip),
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
$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)
$timeoutseconds = 300;取当前时间。Mt.W7d_Jf"r+H
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server^s|&? UQJ
$db_user = "root"; //your mysql database username5Hx3b8}z0{6u
$db_pass = "password"; //your mysql database password if any3Az4{0W0aN |
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limitk~0z#^x{%du
//get the current time
$timestamp = time();H |B [m@^V
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;)vT8|]#qZ
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。4zu2pq4fdycB^'J9h
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接kE#s5f(d7O L\
mysql_connect($server, $db_user);查询数据库的代码：bF6v/_V)MR
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 VALUESD[a6^o?
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");OYt4W1t1?FT `$l
如果用户用错误信息的话，这样处理。
if(!($insert)) {j)Q0^"OE C5Ft
print "Useronline Insert Failed > ";0MXiw0T
}然后实现当超过设置的时间就删除该用户记录。Y:r&JECi!]Q-q
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。`XWsA)?x0Tr
if(!($delete)) {%EV"`D9[-T
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题7n D-f z4t
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用 ]/t$c ]_
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。~'i'@ T9p] u r#k
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");G"R/W"G^d6Y
} else {
print("$user users online\n");'qr^g r'H,w3_7@
}最终把上面代码写成一个PHP文件如下。&@)c3A(_y]/hO(^
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";FO3CE\$j.r"e[
$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;
//connect to database*\9RWg D;iQXEg
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES[pb~VZ`0n ~%t
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");w;S8o BS'n/gP
if(!($insert)) {8x&eq ^%s-|-@
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.'GW\FgM:G
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); e T'D |(L0\7Q
if(!($delete)) {
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page w%NR{.hg:l6jp
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) { vA:} ^LgT
print "Useronline Select Error > ";#QA0j{9G^
}
//Count the number of rows = the number of people online\.W'pfW8x
$user = mysql_num_rows($result);H t N9q6l\e5O
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");t1a k3q~:u:P-@
} else {
print("$user users online\n");
}
?>!LW%Z DK)aUma
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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。v.l:iay0W:fx
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] &cas(C&q.bP0}
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！