PHP创建cookie并仅在cookie存在时显示网站

Question

我想保护网站不被访问，直到用户同意某件事。基本思想是，在每个页面的顶部，它将检查 cookie 是否存在，如果不存在，则退出并包含一个包含消息和两个按钮的 php 页面，一个按钮将创建 cookie，另一个按钮只是将它们移出网站，例如谷歌.com

编辑:

这就是我最终得到的结果:

警告包含看起来像这样:

 <?php

function pageURL() {
    $pageURL = 'http';
     if ($_SERVER["HTTPS"] == "on") {
        $pageURL .= "s";
    }
     $pageURL .= "://";
     if ($_SERVER["SERVER_PORT"] != "80") {
          $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
     } 
    else {
          $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
     }
 return $pageURL;
}

$pageRedirect = pageURL();

    if (
        isset($_POST['agree_button']) && ($_POST['agree_button'] == 'I agree')
    ) {
        setcookie('agreed', 'true');
        header("Location:$pageRedirect",303);
    }
?>


<form action="<?php echo pageURL(); ?>" method="post">
    <p>INSERT MESSAGE HERE (User must agree)</p>
    <input type="submit" value="I agree" name="agree_button" />
    <input type="button" value="I disagree" />
</form>

页面顶部是这样的:

<?php

    if(!isset($_COOKIE['agreed']) || ($_COOKIE['agreed'] != 'true'))
    {
        include('warning.php'); exit;
    }

?>

Answer 1

我会在客户端做...

<script src="js/jquery.cookie.js" type="text/javascript"></script>
<form>
    <p>INSERT MESSAGE HERE (User must agree)</p>
    <input type="submit" value="I agree" onclick="$.cookie('agreed', 'true'); location.href='/'" />
    <input type="button" value="I disagree" />
</form>

支票将是...

if (
    !isset($_COOKIE['agreed'])||
    ($_COOKIE['agreed'] != 'true')
) {
    include('warning.php');
    exit;
}

如果你想在服务器端设置cookie，你需要...

<?php
    if (
        isset($_POST['agree_button'])&&
        ($_POST['agree_button'] == 'I agree')
    ) {
        setcookie('agreed', 'true');
        header('Location: /'); // redirect to main page
    }
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
    <p>INSERT MESSAGE HERE (User must agree)</p>
    <input type="submit" value="I agree" name="agree_button" />
    <input type="button" value="I disagree" />
</form>

参见setcookie() man page