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！%Z7b6Y ^]
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。kHM"C9z??Z
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL3S6L5p/?Q0j
}可以使用的SQL语句。 a p1c'L.{!V
CREATE TABLE useronline (9f d(SkRN
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,xaeO.pL,I
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),&tmMt5X8rm
KEY ip (ip),jPQ(LLN#hL(L!D g @
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。4`+_Mz-`u4p&[
$server = "localhost"; //你的服务器[f+V@0N2r:X
$db_user = "root"; //你的mysql的用户名)Ce,@k%f jA2\,z
$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。
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server(La Z5^#?xr^o
$db_user = "root"; //your mysql database username f3Y9b-HOotn
$db_pass = "password"; //your mysql database password if any-^4[ s2I:Ucu/b/w
$database = "users"; //the db namea8z2d Vdem
$timeoutseconds = 300;//timeoutseconds limit @:f-u0y:u7z n
//get the current timeq-KK|*]
$timestamp = time();
//calculate the lowest timestamp allowedih.hxxq:iq+v
$timeout = $timestamp-$timeoutseconds;x&rm-m'\_E)Y
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。Pk#LN"LH
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接km:n8zmgn
mysql_connect($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*R#ZXz4j9o9I7t{
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。b&_0\1Z'h c:Q+N
if(!($insert)) { |6rG9j4m
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 > ";
}下面我们解决数据库中不同IP的问题&Uz%])M K3LWY4N a+z
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用w {%VC&C
mysql_num_rows(query);来统计用户，代码如下。F)dc3vsq|IM
$user = mysql_num_rows($result);最后关闭数据库。z4u9i&x e!@0Xe5L
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");*OW0Cv6xVQ|7U,g8b;o
}最终把上面代码写成一个PHP文件如下。's*x!Goj
<?phpFL3W9zh7ykq
//Put your basic server info here
$server = "localhost"; //normally localhost u*Vu4f1E
$db_user = "root"; //your MySQL database usernameW1O$Jf)R,[
$db_pass = "password"; //your MySQL database passwordW`2w%^n+b
$database = "users";&lp)pfJZfI
$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 last3n8{/M6Z Q mI
// $timeoutseconds seconds)
//this is where PHP gets the timel!j_ XS*J8r#j$` N
$timestamp = time();`-W.Q V-]
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedD$w(tv~7kfs)B
$timeout = $timestamp-$timeoutseconds;9UzP1i&{Y"sL
//connect to database
mysql_connect($server, $db_user);)H#Fn D4J+Sx
//add the timestamp from the user to the online list!FDt#?:SY&Y
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");;dXY(m+XR1tN2v
if(!($insert)) {
print "Useronline Insert Failed > ";
}I%^8gZiK
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.&G.H,C [$D/}B$\
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {\'IP2a,m9d%cTq
print "Useronline Delete Failed > ";
}j-jj@t g*e
//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='".$_SERVER['PHP_SELF']."' ");5w+v+XV~?Lv
if(!($result)) {
print "Useronline Select Error > ";K!Zu$La/[7BG8KW){
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results,J9Fyj9z+o$a
mysql_close();wIx7LU.?\#[
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}Y}BY)P)eC
?>
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以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。 Abp lM0\${W2Zb
当然啦，这两款主机也是相当不错的。 [$G}DX
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
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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]-d9m(g'[9KDp&i'g#mb
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！