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！*G@9o9s!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。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,r@] D$w-H&U
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,%~W%it)[g
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)KkE7e4y1g7T
);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w?7D!F{U%La!ER
$db_pass = "password"; //你的mysql的密码,F$N8Xni;X`
$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。n\!R,I'Dhx_
$timestamp = time();上面的完整代码：
<?phphIzb8w,g }y2r
$server = "localhost"; //your server$mCYs1j~b1m;h _
$db_user = "root"; //your mysql database usernameiU9K/D:p@X#O
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit$CI^!Mm,aI'w
//get the current timen3O'^_0^I/kR;C
$timestamp = time();p lSpfB
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;nak ~vBv;uF
?>连接mysqloyv j`L&l5x:F%QV
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接_)F5X i#wbN
mysql_connect($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。zq&x_Oy#_ A R
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。#JbD9[%f?^
if(!($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<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {u;_'Y$KrU6]
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。m7Eb&xr
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {X#N"Yl^ pjo#d&GU
print("1 user online\n");bZ2CD[.K&N^)Z
} else {Cw:UX1bS2v
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info hereV*^&MK*k-L)jP
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastoM8T$S]B gt
// $timeoutseconds seconds)
//this is where PHP gets the time
$timestamp = time();0_5B@&ta
//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);1?peNe%P
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESl\G1{inA1J
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");^B%zn xA7F
if(!($insert)) {H%C(hF#qCB#h
print "Useronline Insert Failed > ";p;X!L3m/}5^
}5~fMY h G^*Zf\2F
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.sT+o?6]rTU
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");g-~rNA's-{;ser
if(!($delete)) {zx H2C]h.@E
print "Useronline Delete Failed > ";
}
//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='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {w`Ww"[ |1m)z
print "Useronline Select Error > ";b'N&ALRW+g#A]V @
}/`Y)U:^Z W2^
//Count the number of rows = the number of people online4cX+xM-p$|p^s
$user = mysql_num_rows($result);
//spit out the resultsgZ,@6|+A6H tg
mysql_close();
if($user == 1) {4F!zMM5i
print("1 user online\n");R oA~8}Cndh
} else {
print("$user users online\n");
}!ey'{9Em*P-T
?>
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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。NX3~$J{
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。|*oJm!KEq
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。(|/OW,r'a3I
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uT V ~2et
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]
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！