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!%Z7b6Y ^]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。kHM"C9z??Z
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL3S6L5p/?Q0j
}可以使用的SQL语句。 a p1c'L.{!V
CREATE TABLE useronline (9f d(SkRN
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,xaeO.pL,I
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),&tmMt5X8rm
KEY ip (ip),jPQ(L LN#hL(L!D g @
KEY file (file)
);下面我们是PHP脚本,首先我定义MYSQL的信息。4`+_Mz-`u4p&[
$server = "localhost"; //你的服务器[f+V@0N2r:X
$db_user = "root"; //你的mysql的用户名)Ce,@k%f jA2\,z
$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(La Z5^#?xr^o
$db_user = "root"; //your mysql database username f3Y9b-HOotn
$db_pass = "password"; //your mysql database password if any-^4[ s2I:Ucu/b/w
$database = "users"; //the db namea8z2d Vde m
$timeoutseconds = 300;//timeoutseconds limit @:f-u0y:u7z n
//get the current timeq-KK|*]
$timestamp = time();
//calculate the lowest timestamp allowedih.hxxq:iq+v
$timeout = $timestamp-$timeoutseconds;x&rm-m'\_E)Y
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。Pk#LN"LH
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接km:n8zmgn
mysql_connect($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 VALUES*R#ZXz4j9o9I7t{
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。b&_0\1Z'h c:Q+N
if(!($insert)) { |6rG9j4m
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 > ";
}下面我们解决数据库中不同IP的问题&Uz%])M K3LWY4N a+z
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用w {%VC&C
mysql_num_rows(query);来统计用户,代码如下。F)dc3vsq|IM
$user = mysql_num_rows($result);最后关闭数据库。z4u9i&x e!@0Xe5L
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");*OW0Cv6xVQ|7U,g8b;o
}最终把上面代码写成一个PHP文件如下。's*x!Goj
<?phpFL3W9zh7yk q
//Put your basic server info here
$server = "localhost"; //normally localhost u*Vu4f1E
$db_user = "root"; //your MySQL database usernameW1O$Jf)R,[
$db_pass = "password"; //your MySQL database passwordW`2w%^n+b
$database = "users";&lp)pfJZfI
$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 last3n8{/M6Z Q mI
// $timeoutseconds seconds)
//this is where PHP gets the time