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。W5s3e(N-|
首先我创建MYSQL数据库表。
CREATE TABLE tablename (*l!QQ$]oo ~
field type(max_length) DEFAULT 'default_value' (NOT) NULL3N'k+h2Fr
}可以使用的SQL语句。
CREATE TABLE useronline ('hm N!s7{
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,)e]b/QV M
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D8XCRD4y*w(r
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码!I \ O-D8{)F8S0}+M$r
$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。|:L ~)F'ud
$timestamp = time();上面的完整代码:
<?phpHy+?$t'dc?;rP
$server = "localhost"; //your server
$db_user = "root"; //your mysql database usernamei$[+qBz X-Ag9]D
$db_pass = "password"; //your mysql database password if anyd;?0B)AF TL
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit}L EGK3M4{E
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed?"}"Fiz,wz"V;F
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。V\0qX C
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: } Az9hdZ|2B
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;RhQh U:G6XK
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。 A9o-W u!n5y0` |
if(!($insert)) {$pDq M\c ST
print "Useronline Insert Failed > ";
}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<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {
print "Useronline Delete Failed > ";~%kG;[ m JCA
}下面我们解决数据库中不同IP的问题Ot clP'L {/zW
$result = mysql_db_query($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。 l0oc)Y1vVF
if($user == 1) {Lxq'u~;I)k'r A
print("1 user online\n");
} else {
print("$user users online\n");B/__XZ P
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here
$server = "localhost"; //normally localhostbU9Q;Su.zE
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password_x$Vc7_aE%T
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areV2B V~_ F3kW1@
// 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();!kXYS5`Q
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed