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! y5P q?nUih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 (Pnx;o X(^
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,
PRIMARY KEY (timestamp),
KEY ip (ip),N;\5B*sjt)k{ Y(Fm
KEY file (file)4~f Nt]4Q1t v3eJ
);下面我们是PHP脚本,首先我定义MYSQL的信息。*OQ#yzy$x \
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名 b4vOf{O#A
$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)
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码:
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username7WjM0@)`rQ
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;"VviBczZ%a
?>连接mysqlReLNFw*s+I
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接.A | L'J @*moi
mysql_connect($server, $db_user);查询数据库的代码:\Lm ^e1i#zf
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']."','".$_SERVER['PHP_SELF']."')");$XQR2B0VcQa5A:?T*N
如果用户用错误信息的话,这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";/Xd6`yn'~v\7|
}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<$timeout");同样给出删除记录出错的处理。E4D2@8` u)x+qE Q;^ J
if(!($delete)) { @-Dq p ?5\/E$SN
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题-F6qr,rKp\Q?
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用kn7S:R4i
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。:H B?^.h8A
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。
<?php[D7zs%YEI1{7v
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";h,q-TR`!o(p
$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)O f,MSP
//this is where PHP gets the time
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;j}Ej1m9w'Wa/pi
//connect to databaseM oTPVEl)G'S2}2u
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list4j|)ZJ6Fi} [0|
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {K,i l}s
print "Useronline Insert Failed > ";G/^,z{ a7GL3mb2l5}_q
}3n!g2R6lh
//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)) {I5b v#U9WrHm
print "Useronline Delete Failed > ";