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。+y3u@l4L.H8Ew#@
首先我创建MYSQL数据库表。?m'M1l"P1AGk&`
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL;d0pu[:z
}可以使用的SQL语句。h/@.G;PW2|Q
CREATE TABLE useronline (bA9z Bp,X
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,VFQPj_e8w
file varchar(100) NOT NULL,`%xL_w-L7t
PRIMARY KEY (timestamp),/g(OIZP
KEY ip (ip),|7cq vx.V"]
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。)qW|*e;x#zmN,W
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名5]'gD+IP
$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) HeP6nW(z
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：)@h~kOE+}7l6xB6?
<?php!z+BK9nO'I x
$server = "localhost"; //your server
$db_user = "root"; //your mysql database usernameua|4pzE {
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name7twU&S-A9j8I
$timeoutseconds = 300;//timeoutseconds limit
//get the current time+GC!|+D"k2@
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql/F]#bt$NL
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($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。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESt-`xZxQ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。 }8~xtp7j5J&L
if(!($insert)) {!d$e8R5dO-o [:J
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。Rvn5R@
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。.[n7Z6iBZ8W
if(!($delete)) {!q:P8^(Yf7`2C$Q*Z
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='".$_SERVER['PHP_SELF']."' ");使用Taj8W j$b#bw DV
mysql_num_rows(query);来统计用户，代码如下。eH ~p(P
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");.`~l:S,S1M5Aj
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。]/\F8a0\"^ Qr4t
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username2M mlx9Q;Y4\ dl.K
$db_pass = "password"; //your MySQL database password
$database = "users";
$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 time
$timestamp = time();;W"v;X5AN X;b
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;+WccbHF+~m.EEH
//connect to databaseqWE(P`v;`
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list7FD(TNvm%D X!Z
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES-WxfjW~(Wl
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");0D|7Mp~&Y T
if(!($insert)) {
print "Useronline Insert Failed > ";Z:O4oD J_Nm
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.apIdG
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {*JAoqTe%EX
print "Useronline Delete Failed > ";kT$b$A*xZ*R)_BL
}2{m!h9Q%`W.D m0Z#O
//select the amount of people online, all uniques, which are online on THIS page&h1G+G:J.|'{T6p
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");'re.~^rD
if(!($result)) {
print "Useronline Select Error > ";
}Vu8m6c*M;@M
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {1~ C#?`M
print("1 user online\n");
} else {0YaSM0y;q&j
print("$user users online\n");R~]~U}/Sx2a(n!L
}
?>V7B!s i9W3waa$A'a
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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。-p:s3AGjX
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。8?Va tY
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n B @nw`7I-l
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]
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]uh*g OVvjU*X
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！