PHP随机链接无需重复 [英] PHP random links without repeating

问题描述

我正试图建立一个网站，以随机方式引导您浏览8页，而不重复页面，例如：
首先'filmpje4.php'，其中包含指向'filmpje8的链接。 php'，导致'filmpje3.php'，等等，直到所有八个页面都被访问过。

I'm trying to put up a site which leads you through eight pages in a random way, without repeating the pages, for example: First 'filmpje4.php', which contains a link to 'filmpje8.php', which leads to 'filmpje3.php', etcetera, until all eight pages have been visited.

我在几个网站上环顾四周，但我找到的代码似乎没有工作。我一直在重复...

I have looked around on several sites, but the codes I found didn't appear to work. I kept getting repeats...

我尝试过的代码示例：

$links = array('<a href="filmpje1.php">filmpje1</a>', [...]'<a href="filmpje8.php">filmpje8</a>'); 

// get users visited links to an array
$visited_links = explode('|', $_SESSION['visited_links']);
// remove visited links from links array
foreach($visited_links as $visited_link) {
unset($links[array_search($visited_link, $links)]);
}

// get a random link from unvisited links
$link = $links[rand(0, count($links)-1)];

// add the selected link to visited array
$visited_links[] = $link;

// save visited links to user session as | separated string
$_SESSION['visited_links'] = implode('|', $visited_links);

echo $link;

推荐答案

<?php
  session_start();
  if (!isset($_SESSION["visited_pages"])) { $_SESSION["visited_pages"] = array(); }

  $links = array("file1.php","file2.php","file3.php","file4.php");
  $nonvisited_links = array_values(array_diff($links,$_SESSION["visited_pages"]));

  $next_index = mt_rand(0,sizeof($nonvisited_links)-1);

  $_SESSION["visited_pages"][] = $next_page = $nonvisited_links[$next_index];
?>

<a href="localhost/<?php echo $next_page; ?>">visit!!</a>

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