难以打印标题和URL阵列

Question

我擅长php。

我有一个.html文件的文件夹，该文件夹将经常更改，然后我想搜索文件夹，解析<h1>标签，然后打印/回声每个<h1>标签及其URL。

从.html文件中获取<h1>标签非常容易，但是我似乎无法打印<h1>标题及其相应URL的列表。

这是我到目前为止所拥有的：

        $url_list = glob('posts/*.html'); // Searches for all files and folders in above directory that end in .html.
        foreach ($url_list as $url) { // Creates an array of post URL's and title <h1> tags.
            $post = new DOMDocument(); // Creates string to load blog post.
            $post->loadHTMLFile($url); // Loads blog post into string $post from its URL.
            $h1_tags = $post->getElementsByTagName('h1'); // Finds all <h1> tags.
            $first_h1 = $h1_tags->item(0); // Gets value of first <h1> tag.
            $title = $first_h1->nodeValue; // Sets $title to value of first <h1> tag.
            if (!empty($title)) { // Will only run on files which have a date in their metadata.
                $post_list[$url] = $title;
                $post_list[$title] = $url;
            }
        }
        sort($post_list); // Sorts list of posts in alphabetical order.
        $num = 1;
        foreach ($post_list as $title) { //
            echo "<a href="{$url}"><h2>".($num++).". {$title} = {$url}</h2></a>";
        }

Answer 1

您将标题和URL添加到同一列表中 - 但反转。如果您将数据构建为...

        if (!empty($title)) { // Will only run on files which have a date in their metadata.
            $post_list[$title] = $url;
        }

所以这只会添加一次，然后像...

一样输出它

    foreach ($post_list as $title => $url) { //
        echo "<a href="{$url}"><h2>".($num++).". {$title} = {$url}</h2></a>";
    }

编辑：将sort()更改为asort()