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。
CREATE TABLE tablename (hii6s7BL
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (6mUFs1q:jzbZY
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL, H*pc&h)mUs e
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。
$server = "localhost"; //你的服务器,b]R'@dttR
$db_user = "root"; //你的mysql的用户名/tkL~ `/wa8tL
$db_pass = "password"; //你的mysql的密码*bhx-d`/G
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)4j_+cS6JZ*i @`m
$timeoutseconds = 300;取当前时间。 ddi&XN6{9g
$timestamp = time();上面的完整代码：$A y0JsD:v0[.`*o
<?php0Iv$U"A+f9l*?e/mQ#ei
$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
$timeoutseconds = 300;//timeoutseconds limit
//get the current time0n t d o:}3N2jj
$timestamp = time(); rF"DB}H+g?
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql PM:QSrN
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接)V `*Q A/_G H
mysql_connect($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。`6z*Mw)V_"Y8|(KL
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES3sYN)F5D,q|
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); p D4o`AL}O.J
如果用户用错误信息的话，这样处理。9wtP'|t-F+y[9@
if(!($insert)) {c*f;Zr"o"G3K
print "Useronline Insert Failed > ";|$\ |7P8WcIM#s$o
}然后实现当超过设置的时间就删除该用户记录。Qk%k'~M
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。8| r2[:^h;C:a|"Z
if(!($delete)) {h`5_y kE
print "Useronline Delete Failed > ";.toM-i8L%q.e Pt(|d X
}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。
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {?8PB xqq[Q
print("1 user online\n");
} else {
print("$user users online\n");q4Eqp3@|
}最终把上面代码写成一个PHP文件如下。
<?php1W5_S'BW,I#a~:?
//Put your basic server info here
$server = "localhost"; //normally localhost7}6Ix!q(I(mn
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password w9u"}8lB
$database = "users";d@A4M4C|_9Eo4ve
$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 timeloeI] V
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES,FR W0T$P
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {3_GVc ^
print "Useronline Insert Failed > ";
}vh3A3O B3bY
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {-@I`P7{U#D
print "Useronline Delete Failed > ";
}m5kO:^\y8I2rWN;R
//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='".$_SERVER['PHP_SELF']."' ");W-T:f1G&F_K
if(!($result)) {3IM&]K^-P0RG\@(^K.v
print "Useronline Select Error > ";
}t!K?Nf
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);~ cg o1X#f(x,O3N
//spit out the resultsi%[B~6|ft#y
mysql_close();
if($user == 1) {
print("1 user online\n");4EL;D1s!cGPI
} else {
print("$user users online\n");
}
?>)M u8HV$u)b W@L N_
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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。?B'nu#I:N
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。5O.u%NG6d?
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。o!Z[1T9|!VZ|}4{
当然啦，这两款主机也是相当不错的。*l)n9kY [ V)I-V bI
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] u ] ejF:X)Y%i
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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！