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！4mj!D.f5VwW,b
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。H M4i t5x N#k9}
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,'\:L6M&s+rvgx
ip varchar(40) NOT NULL,h6V4r.E"y^6ZD
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。#]'Y;UhW^N
$server = "localhost"; //你的服务器g/AU.rg5cs+A
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码8Ii5c1`)O t.M
$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。
$timestamp = time();上面的完整代码：
<?php#`'lM-|4s4^!mXW
$server = "localhost"; //your server `_8G&~V;fW
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any"~-F#}.c3{gy~
$database = "users"; //the db nameP6{X$O[3R'D
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeC h3Sx o@
$timestamp = time();oHN!ciee
//calculate the lowest timestamp allowedQK!gt7Hy;ff
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($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']."','".$_SERVER['PHP_SELF']."')");G1m8C:h$Lw6W
如果用户用错误信息的话，这样处理。bH(Mp$lU
if(!($insert)) {f UI"@ FG
print "Useronline Insert Failed > ";iB-L x%V.f1l8Q"M tW B
}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 > ";i Ktt'{ t9V
}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oPQ9z%m r%C
mysql_num_rows(query);来统计用户，代码如下。l1AtwP4XY&k
$user = mysql_num_rows($result);最后关闭数据库。"C{2`+oIErk+G
mysql_close();显示在线的人数。
if($user == 1) {uP&L;Z2f2Nh
print("1 user online\n");ES Z[D.|6XZ
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。1Pf-GF bYy-u
<?php/^T#u)r A
//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";J{},je|]{rY
$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 timeq;k h)op4Rc{
$timestamp = time();O9^t*S!F%U S5|
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed&L2u)wB!Z4i6Qog7Bw,D
$timeout = $timestamp-$timeoutseconds;,x$\6l(m)aJfl,Z(B
//connect to databaseo-i8Q"M4S'JG
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listB9J(C T}$vUx
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");3Z/BJ(tu"N
if(!($insert)) {
print "Useronline Insert Failed > ";
} n^amE!NI
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.Ze yGU5T'WV
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");r`V7d{0|
if(!($delete)) {
print "Useronline Delete Failed > ";
}c:n+T0N{#`OA
//select the amount of people online, all uniques, which are online on THIS page#~S{"G3CT6L!q^
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";*xc^T!~$xs"q.^
}
//Count the number of rows = the number of people online$iJ![G(X8otl*oV
$user = mysql_num_rows($result);Xw!p3P(d,jdH
//spit out the results
mysql_close();jQY"W$s7C
if($user == 1) {
print("1 user online\n");I&P @1v ]~Wr6z H
} else {
print("$user users online\n");
}JAeK6G5T;A9J
?>
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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。5KuN]G[
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
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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] ]0ya6}W`aD]
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！