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！
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。\ZRYplJ5u |%F
CREATE TABLE tablename (/t!`n7} x
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (0A1yvK/B+T9Kh@
timestamp int(15) DEFAULT '0' NOT NULL,2v@9m/[/Rn
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。 TpN-rw PW*|:d
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名ztP{n
$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)9Ypik jk-h
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：|1vFD ]*lBIH-H
<?phpu+w+o.T2R:Wn(t
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name YF;Q*e8A_Ma:u
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeJH/v-k m
$timestamp = time(); XVg4z&n9p
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlJgC}"T:_g
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。#T$q$b7ouE\*Oy
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接l^T(@ KnBN
mysql_connect($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。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");:`z+m/Aw{TY
如果用户用错误信息的话，这样处理。7Y.}4QU1s-B
if(!($insert)) {*G0g,@|~Oy}Xl
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)) {
print "Useronline Delete Failed > ";qdr*@Ev*H\U.L
}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。6}m,sD-e
$user = mysql_num_rows($result);最后关闭数据库。;R/{+_'a*L2WF!P-]
mysql_close();显示在线的人数。m&zb.`:a.?+e:K
if($user == 1) {
print("1 user online\n");tPF({\:P\"DS
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。P1yQ${ kI a[
<?php
//Put your basic server info here_;H)b,]~K8^
$server = "localhost"; //normally localhost }-J"j[+MI7r([
$db_user = "root"; //your MySQL database usernames [C]$R}:i
$db_pass = "password"; //your MySQL database password\+A D/Ik3L,G5T_
$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 lastkX?3dl`/|5r#R
// $timeoutseconds seconds)
//this is where PHP gets the timeT J0]T%?.Gv7d5m
$timestamp = time();*o0{NWo6mg2H
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed4S6}2@p2{&I
$timeout = $timestamp-$timeoutseconds;1p|.pBp
//connect to database
mysql_connect($server, $db_user);HY'`UxC']
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES.N-V1\L0M^+K.~*T
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");NJ wUk~'q!^5ou
if(!($insert)) {W.INz7`4w;b
print "Useronline Insert Failed > ";~.u-PcL#u B`
}
//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 > ";0FMi$D$w2?c F7pm
}
//select the amount of people online, all uniques, which are online on THIS page:p$YGQU!N/Q$F%Y
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";]8f!h4X-Sp@-V
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the resultsI{a4A8QD*cM6k%zL'{
mysql_close();
if($user == 1) {
print("1 user online\n");5y%gT&Ek%A U
} else {+Q^dY K/N O
print("$user users online\n");
}0B6n/V/{*xN4}AF
?>J/{xa*M-A
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]rN Ph,M }0}2i&I L
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。h7\i-s"ziH8q
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。7lt7F"lE,}_\
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。
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]
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！