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！ V$} M8h l2r
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。T'zdc4j b-M*D
首先我创建MYSQL数据库表。
CREATE TABLE tablename ( pCJ?8L,CyD _,v
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。cc*qw_
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,sg2{_jIP4a
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),p R?3f3D3X&W#Z
KEY file (file)1T2xGM6n6\7yy'[j
);下面我们是PHP脚本，首先我定义MYSQL的信息。 zX%cGRe
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)Y(|~j+G%v F K$j
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php
$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@o.I*OcQ
$timeoutseconds = 300;//timeoutseconds limit&zGp9I]!c-Aff
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;n(J/p Z g C,_P?
?>连接mysql_p8YTJ.u
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。4C"vl iB&|&A
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。/y"^[c{1k1Z
if(!($insert)) {hQ0BXuo7Ze g
print "Useronline Insert Failed > ";8f8~@bSH.TE
}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<$timeout");同样给出删除记录出错的处理。&K crL;y:q
if(!($delete)) {
print "Useronline Delete Failed > ";2fLp Kj-G.r/{
}下面我们解决数据库中不同IP的问题 MCfgv'{I tz k
$result = mysql_db_query($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。7w&]T*g-P
$user = mysql_num_rows($result);最后关闭数据库。^$A"U(l,t
mysql_close();显示在线的人数。
if($user == 1) {2hb(iB7K ?Q
print("1 user online\n");
} else {-t-CkFvBq7Re;V[n
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。SjgWc9n FI
<?php
//Put your basic server info here"r/a+d_W+W)c
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernameo2k9LH^$E
$db_pass = "password"; //your MySQL database password"XCm^|t?
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areM.UYRLzmO
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last\{*zq*r-^oA
// $timeoutseconds seconds)~WyBt
//this is where PHP gets the time/GqwLC'_'B5j3[
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed a?,L#ECS
$timeout = $timestamp-$timeoutseconds;"pl#vJ0Vy f,YU
//connect to database
mysql_connect($server, $db_user);7[7}.DN$[@X d
//add the timestamp from the user to the online list"Si%zxO:B]'{
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}k B[9p/lS#~C&u,k
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.+Hf kZZ$]Z
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");:Mp)zbfN,ZK?
if(!($delete)) {
print "Useronline Delete Failed > ";mL [T} j6HsP&t
}k#Z'_$D&L p
//select the amount of people online, all uniques, which are online on THIS pagey:N%{_d
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";,^\!~TN@~
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//Count the number of rows = the number of people online
$user = mysql_num_rows($result);oN7\3eMJr\m
//spit out the resultsiOU7[SA&T7A
mysql_close();,ec Y2O'q8o)Z
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}vga ru
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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。] L3@{IIE
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。nnt)Te4~R3i
当然啦，这两款主机也是相当不错的。,\Ce5Kc ^X
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n;}6A[.l2Yw
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] S-y'q8B!p `?
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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！