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！4x CEQ;u| H\
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+h3g8HX1M7?s
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
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。-c.gOz$dUx d g
$server = "localhost"; //你的服务器"zO/k&Z1oWIkQ at-|
$db_user = "root"; //你的mysql的用户名$y[#|-V`0K
$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)"nF#x3ToxY"[6@u
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php7||6];NA3L"Oa
$server = "localhost"; //your servera}@k,f6E9}{ C0U%og
$db_user = "root"; //your mysql database username7] ^IN.bq
$db_pass = "password"; //your mysql database password if any(YY9u6N:z
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit0N en9r7q1lM'C
//get the current time
$timestamp = time();-a'L#Y#cn1c
//calculate the lowest timestamp allowedH)R{eS$u
$timeout = $timestamp-$timeoutseconds;
?>连接mysql$v.^q2JnA2J
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。5VCQ7c,ub{
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($server, $db_user);查询数据库的代码：H#I9KK(RP
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']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。(R8F1t/DV4kO)v4X+W"?
if(!($insert)) {
print "Useronline Insert Failed > ";}_Wy@0h
}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<$timeout");同样给出删除记录出错的处理。o\J fee
if(!($delete)) {9[^Hc-j J+_
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题oQTzDd;Y\5xr7~P
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用"O3^:urjA[fF
mysql_num_rows(query);来统计用户，代码如下。6F/adG;EVH7W [
$user = mysql_num_rows($result);最后关闭数据库。'ZnuCp!S.U
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n"); AA aiS1R
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。t{P `BlDrn
<?php
//Put your basic server info here'fGY7X[M
$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 last^E/J8V/NZwx
// $timeoutseconds seconds)
//this is where PHP gets the time/v6q/H9A-k3sh1|
$timestamp = time();2N"Ete~@GW
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;\*t G_9j$W-lw^ p,d e
//connect to database*X'[&t7U {
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listt2Xl-`%N*Sm
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");\"a2n L qL+lhmL
if(!($insert)) {
print "Useronline Insert Failed > ";-z0F8_Y/w0GU
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");P7a2tzFq:L0W?
if(!($delete)) {
print "Useronline Delete Failed > ";/?c_O}2zpCH
}8W {lU0JIHB
//select the amount of people online, all uniques, which are online on THIS page `-pJ:Lgm?OL1q
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {)J*O(t b1t Y
print "Useronline Select Error > ";
}0y.wtZN(zoG b
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {H%|/y.RZ:B,u
print("1 user online\n");9C'R t&PN wN[]%M
} else {q~{%?%{a T[
print("$user users online\n");
}
?> M E9G0I#]9CBD%c/A
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]6qju4Mq w
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。$rqoN\s&L&`J
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。3`o-Z+w4P
当然啦，这两款主机也是相当不错的。$GY2g#w o*X'TU
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W,mC.gbKX5Z
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] 0r,fFB[YX
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]U2GFUS\-|G
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！