PHP防刷新

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时间: 2008-09-10 信息来源: 梧桐树下作者: 编辑整理点击数:

内容提示：PHP里防止刷新比较麻烦些，比如对计数器的防止刷新比较麻烦，不象asp里那样方便，本文将介绍三种方式实现防止页面刷新,供大家参考.

方式一

<?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;

}
?>

方式二

<?php
session_start();
$allow_sep = "30000";
if (isset($_SESSION["post_sep"]))
{
if (time() - $_SESSION["post_sep"] < $allow_sep)
{
exit("请不要反复刷新");
}
else
{
$_SESSION["post_sep"] = time();
}
}
else
{
$_SESSION["post_sep"] = time();
}
?>

方式三

<?
session_start();
if(!empty($_POST[name])){
   $data = $_POST[name];
   $tag = $_POST[tag];
   if($_SESSION[status]==$tag){
     echo $data;
   }else{
     echo "不允许刷新！";
   }
}
$v = mt_rand(1,10000);
?>
<form method="post" name="magic" action="f5.php"><input type="hidden"
name="tag" value="<?=$v?>"><input type=text name="name"><input type="submit" value="submit">
</form>
<?
echo $v;
$_SESSION[status] = $v;
?>

Tags: 防刷新,防止页面刷新

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