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！ Vi+|']V;GJ
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 (
field type(max_length) DEFAULT 'default_value' (NOT) NULLd F8Q|Z h
}可以使用的SQL语句。j0qNV/l&Z+lQO
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,"m"i GM(n]@5N
file varchar(100) NOT NULL,s]k\~7WjAO
PRIMARY KEY (timestamp),K y#V8f&LE8pS
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n5jXQcN,u*y
$db_user = "root"; //你的mysql的用户名 yjZ0mu
$db_pass = "password"; //你的mysql的密码u&q'n TJ
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)6P&}+l#L#qkp\1p \;P
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：*@0GDr6C+ZG.VMh
<?phpQ(aX?m)i:\%d
$server = "localhost"; //your serverd#U d ^[vR
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyo;Hm8L K'V]$[-D4z
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowedeTWTj
$timeout = $timestamp-$timeoutseconds;%dhQ7D$V!G^1uH
?>连接mysqluy0?9A3^+ah xV
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。-G`eU:Px w,k P TJ
mysql_connect($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：8W%c'Z-N,hF(A
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
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {#T)rc[1|s})T2[Q
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。o!G1| @-L
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {6EA0cs'Q!p)wC9J }7g
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题L.NI^"D"h
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用:n,u*Tz4haL(i]z
mysql_num_rows(query);来统计用户，代码如下。x]"W0Zl6r
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。 Y?4bo O!@E&H~
<?php,K2{RL&J
//Put your basic server info here
$server = "localhost"; //normally localhostl"Ue x|C's2O
$db_user = "root"; //your MySQL database username;_+C0n0d/gm[7Q
$db_pass = "password"; //your MySQL database password a k"kZ.@5s;s
$database = "users";?ODxwOkh
$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 timei:Sv*Bm U
$timestamp = time();cwr5t'|]8D
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed|;ytE'b,}d4Z n
$timeout = $timestamp-$timeoutseconds;tl~5pGN
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list.bd9W%}l4Ci
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES8e5PncQZ6G*v
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
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<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";3Pg t L|TXa
}
//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='".$_SERVER['PHP_SELF']."' ");5L$|&]7g&S]
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online/@z7``3S9^
$user = mysql_num_rows($result);(hAP]iF'TIy,Y[
//spit out the results)sN i;S7P2s;Z(f
mysql_close();
if($user == 1) {
print("1 user online\n");?:n/s6Vr
} else {
print("$user users online\n");q&u*I KD
}`0_4a5o&tKb&y
?>9tjf9{9FH2qi#{F
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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。jA7]]:SJ7ezI
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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！