复制代码 代码如下:

<?php

session_start();

$k=$_GET['k'];

$t=$_GET['t'];

$allowTime = 1800;//防刷新时间

$ip = get_client_ip();

$allowT = md5($ip.$k.$t);

if(!isset($_SESSION[$allowT]))

{

$refresh = true;

$_SESSION[$allowT] = time();

}elseif(time() - $_SESSION[$allowT]>$allowTime){

$refresh = true;

$_SESSION[$allowT] = time();

}else{

$refresh = false;

}

?>