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！"S [2gX0s0q7z
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。$`6di;r1eT@
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。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,iJ4dC_s
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。6YQC?(u
$server = "localhost"; //你的服务器&]}+WYb/|rP#b8r
$db_user = "root"; //你的mysql的用户名]-q%I]Y%BX:n(Ar&P
$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)Sp+flJ5r
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server![?}:{ kZg
$db_user = "root"; //your mysql database username C5H#S|@d
$db_pass = "password"; //your mysql database password if anyC+w'F?d}
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limito?SS&ecQ
//get the current time}$v['PE"m
$timestamp = time();9g`)g+LXpD;Jfg
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;FY+N1aIk'}
?>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, $db_user);查询数据库的代码：M ?7F;t]X/J3e"K,u
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。(Q6Y}$m|.cL0@`%[U
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); F?5^&lkGL
如果用户用错误信息的话，这样处理。@XQ7XS2X5h ]-T
if(!($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。%[(`)\ I x P |%@
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {(S;PU"G7pu+| W!]
print "Useronline Delete Failed > ";"o:kj9q8N^$h_g
}下面我们解决数据库中不同IP的问题;L \SvfU,M
$result = mysql_db_query($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。l-Zm*\$FO4N
if($user == 1) {#{&N9^,@(c4ZM Qt
print("1 user online\n");5b DEj}:m
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。1j@5~7mGt(pHA
<?php
//Put your basic server info here1peoaYN
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are$Ewj3fmY
// 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 time']n mGa0]t
$timestamp = time();n8`)Ba1UD"C
//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
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {,f3X/A3gC Q)j
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");-O{h(C5lXe
if(!($delete)) {4Dny&q4zN g-St
print "Useronline Delete Failed > ";/{;UV]8o4mZVJs
}%]j4W'}U+u4A
//select the amount of people online, all uniques, which are online on THIS pageXz9\4_o(m.M
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";
}j1c6n[DfO1HGZ
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {+\(BcwF2I wP6a8s
print("1 user online\n");6}*T!C\%]
} else {
print("$user users online\n");-s)a1s+u-a1y~0j(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。
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。.Hu.t!fn
当然啦，这两款主机也是相当不错的。+o{,` j)iz|
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#i ph2\n*_nV5B
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]
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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！