检测何时访问页面更改图像 [英] Detect when page has been visited change image
问题描述
我知道:visited存在一些问题，所以现在我正在寻找一种替代方法.我想知道用户是否可以访问我网站上的某个页面，一旦他们返回首页，就会显示不同的图像.
I know there are a few issues with :visited and so now I'm looking for an alternative. I'd like to know if it's possible for a user to visit a certain page on my website and once they go back to the homepage, a different image shows up.
更新:主页中有图像，当您单击图像时，它会变为新图像，表明您已访问该页面.但是，如何检测您是否在网站的另一页上，而无需单击图像就可以访问链接?我仍然希望该事件触发更改.那有可能吗?
Update: there are images in the homepage, when you click on one, it changes to a new one, indicating you've visited the page. BUT how do you detect if you are on another page of the site and you visit the link without clicking the image? I still want the event to trigger the change. Is that even possible?
推荐答案
<?php
// Code to put in every page.
if (session_name() == "")
session_start();
if (!isset($_SESSION['visited']))
$_SESSION['visited'] = array(); //Init.
$current_page = "current_page"; // Set the page here.
if (!$_SESSION['visited'][$current_page])
$_SESSION['visited'][$current_page] = 1;
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test Page</title>
</head>
<body>
<?php foreach ($pages as $page) : ?>
<?php if ($_SESSION['visited'][$page]) : ?><p>Image 1</p><?php else : ?><p>Image 2</p><?php endif ?>
<?php endforeach ?>
</body>
</html>
使用PHP会话应该可以.
Using PHP Sessions it should work.
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