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。 `*t$X|.FtA/d
CREATE TABLE tablename (ve!d#Q0h
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。C ^djQbls
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,3wK.f2}G(x&ar,M
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),i}nl;G7Y
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。.KyDI,N5z/U2W
$server = "localhost"; //你的服务器)tH'};Ex/te
$db_user = "root"; //你的mysql的用户名B;CpGd;G$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)8b4|0L2l{P0E
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：4F!]'| P4b+L.|4t`
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database usernamem'{9`o/L)S snC-P
$db_pass = "password"; //your mysql database password if anyqsz%Oy4@5K!Q
$database = "users"; //the db namea{"W'kB
$timeoutseconds = 300;//timeoutseconds limit_rZ g AH WD
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;#G`7[2z4w5l
?>连接mysql'H2z jb"rI
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。0yx T+|%X4p8`+@Y
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-o]WZP1x Gy
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($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。%b:FK{1e
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。KyB&hKDGy
if(!($delete)) {
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。0k/q8t+zc+q*al-~
$user = mysql_num_rows($result);最后关闭数据库。|4P!Zh`Y-c/uGI
mysql_close();显示在线的人数。W.u`:is)ox
if($user == 1) {+]zZq u
print("1 user online\n");
} else {B1w5~ ]`
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。A|U[+U^+u8[&G] m
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordt~w4EmO%s5q
$database = "users";3i"d7E1U4tp:n$]+r:W"n']U
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areY*_$u/zu
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastD)r*Pl;^:{j
// $timeoutseconds seconds)
//this is where PHP gets the time&HbQ^"CVcn
$timestamp = time();pLf|z2W
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed;d[VCI o)Q8[
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);XF_ q*Y-HG
//add the timestamp from the user to the online list1mfQ-P'T@
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9\IdG`6` z2E,G?0R
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {I$z2NF0z)t
print "Useronline Insert Failed > ";s*PJeB2n-mU
}%Uy(v }7H%NO,Y
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.W j2~{&W"L)]s$_
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {pUa4f5d[m\#|y$C
print "Useronline Delete Failed > ";^$u*]|7szk
}B[F2e P8]3nR5S ^
//select the amount of people online, all uniques, which are online on THIS page&}1~a/n e;hm2__
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");;J8~F!EEx'~+K?4\
if(!($result)) {
print "Useronline Select Error > ";f+o9[SP6^
}DV?0t;sWmy
//Count the number of rows = the number of people online,T%f-Y{\#ij
$user = mysql_num_rows($result);q Yh*D{
//spit out the results
mysql_close();%h$AU+C9R'ME0Q)O
if($user == 1) {:[*JdBU^
print("1 user online\n");(G!DNT'xb$gR/g(j?
} else {
print("$user users online\n");BA2bg4\6Kjym
}
?>~%UZG!~
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
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。'x9n5Uy(]lq
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。P!Vfy1c
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,\ KV$GD op2H
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] (o*Zp+N^NAi)^#s G
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。

页: [1]

捌玖网络工作室's Archiver

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！