復制代碼 代碼如下:
<?php
//只能通過post方式訪問
if ($_SERVER['REQUEST_METHOD'] == 'GET')
{header('HTTP/1.1 404 Not Found'); die('親,頁面不存在');}
session_start();
$fs1=$_POST['a'];
$fs2=$_POST['b'];
//防刷新時間,單位為秒
$allowTime = 30;
//讀取訪客ip，以便于針對ip限制刷新
/*獲取真實ip開始*/
if ( ! function_exists('GetIP'))
{
function GetIP()
{
static $ip = NULL;
if ($ip !== NULL)
{
return $ip;
}
if (isset($_SERVER))
{
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
{
$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
/* 取X-Forwarded-For中第x個非unknown的有效IP字符? */
foreach ($arr as $xip)
{
$xip = trim($xip);
if ($xip != 'unknown')
{
$ip = $xip;
break;
}
}
}
elseif (isset($_SERVER['HTTP_CLIENT_IP']))
{
$ip = $_SERVER['HTTP_CLIENT_IP'];
}
else
{
if (isset($_SERVER['REMOTE_ADDR']))
{
$ip = $_SERVER['REMOTE_ADDR'];
}
else
{
$ip = '0.0.0.0';
}
}
}
else
{
if (getenv('HTTP_X_FORWARDED_FOR'))
{
$ip = getenv('HTTP_X_FORWARDED_FOR');
}
elseif (getenv('HTTP_CLIENT_IP'))
{
$ip = getenv('HTTP_CLIENT_IP');
}
else
{
$ip = getenv('REMOTE_ADDR');
}
}
preg_match("/[/d/.]{7,15}/", $ip, $onlineip);
$ip = ! empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';
return $ip;
}
}
/*獲取真實ip結束*/
$reip = GetIP();
//相關參數md5加密
$allowT = md5($reip.$fs1.$fs2);
if(!isset($_SESSION[$allowT])){
$_SESSION[$allowT] = time();
}
else if(time() - $_SESSION[$allowT]-->$allowTime){
$_SESSION[$allowT] = time();
}
//如果刷新過快，則直接給出404header頭以及提示
else {header('HTTP/1.1 404 Not Found'); die('來自'.$ip.'的親,您刷新過快了');}
?>
復制代碼 代碼如下:
<!DOCTYPE>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>b.html</title>
</head>
<body>
<form action="b.php" method="post" >
<input type="hidden" value="a"/>
<input type="hidden" value="b"/>
<button type="submit" >提交</button>
</form>
</body>
</html>
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