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 (*v"kg CHj fd5m
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (]2B!nm0A6c:F[n
timestamp int(15) DEFAULT '0' NOT NULL,THwr{
ip varchar(40) NOT NULL,{p'Ur ^
file varchar(100) NOT NULL,0h*p!r1]{]
PRIMARY KEY (timestamp),ZC/@-V| z"TtT
KEY ip (ip),A }4e3K7S&l
KEY file (file)`~{CZ/VJmm1\o9v
);下面我们是PHP脚本,首先我定义MYSQL的信息。!dT p~l~8i ]4{
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名8qS#MZ*}4G
$db_pass = "password"; //你的mysql的密码FW*j*cw6J$@(m
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码:}(S8QB ^G:u
<?phpqu K$Y-G3G
$server = "localhost"; //your serverP|T] F'A2L4`'VT:\"a
$db_user = "root"; //your mysql database usernameav%|*V$lgi
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name9gte(E8WQlJ
$timeoutseconds = 300;//timeoutseconds limit$h#Pq:{#pQDs0c
//get the current time4_2\L o,G&C4Kf)A!^
$timestamp = time();J tI*d6`lec
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql@!f&c YU"R
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接w d.Aj/BI
mysql_connect($server, $db_user);查询数据库的代码:OC+U mGF6X.X i[
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。d!wD@;Md)A
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES0qh+Ds"I%?2p
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");K5BL R5]j;u#F
如果用户用错误信息的话,这样处理。-k(K9R]EDb
if(!($insert)) {
print "Useronline Insert Failed > "; J2T2c mcd6IwcG
}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<$timeout");同样给出删除记录出错的处理。B&ppgdJ9j
if(!($delete)) {MjVm4f#uMrW
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题~;S"T(YL{7z
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用 @\,S QC/a%?+c'w
mysql_num_rows(query);来统计用户,代码如下。"SStq(as
$user = mysql_num_rows($result);最后关闭数据库。{(g]E k1t~9w~
mysql_close();显示在线的人数。/i-Bc0zUF k
if($user == 1) {I]G t%zk w
print("1 user online\n");
} else {
print("$user users online\n");/jP/C!~ Y;o&r
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info hereCX/p0q[
$server = "localhost"; //normally localhost"Wyo7}ms*ZNY7r
$db_user = "root"; //your MySQL database username!t uLF)S;K7}
$db_pass = "password"; //your MySQL database password
$database = "users";$e"YEM6_~H
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areZz!rQ8W|3lq4o/aNu-I
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last