Workshopshed

<p>The RSS Feed checker looks through your blogroll for links with rss feeds and then stores the name and url of the latest article.<br />
The Links RSS Enhanced widget then displays the latest links in descending order.<br />
The idea for the widget comes from the blogroll widget on blogger.</p>
<p>Version 2.0 for PHP 8 and above only. Only tested on 6.9.<br />
For earlier versions of PHP use Version 1.1</p>
<h3>Technical section</h3>
<p>The plugin will create an extra table in your wordpress database to store the latest feed updates,<br />
this will be called links_rss with the prefix for your database e.g. wp_links_rss</p>
<p>A Cron (schedule) is created to run every 30 minutes and process links. Note that Cron in WordPress<br />
depends on hits, your WordPress website receives. So playing with this plugin within an offline<br />
environment (MAMP, XAMPP, WAMP etc.) without anyone or anything triggering the scheduling by<br />
sending requests to the WordPress page won’t produce any results if you do not trigger it by<br />
yourself.</p>
<h3>References</h3>
<p>A selection of places I’ve found help for this plugin.</p>
<p>Thanks also to Ozh, Roland Rust and for their explainations and examples</p>
<h4>Admin UI</h4>
<ul>
<li>https://codex.wordpress.org/Function_Reference/add_meta_box</li>
<li>https://codex.wordpress.org/Administration_Menus#Page_Hook_Suffix</li>
<li>http://wpengineer.com/1295/meta-links-for-wordpress-plugins/</li>
<li>http://www.code-styling.de/english/how-to-use-wordpress-metaboxes-at-own-plugins</li>
<li>http://planetozh.com/blog/2008/02/wordpress-snippet-add_meta_box/</li>
<li>http://wptheming.com/2011/08/admin-notices-in-wordpress/</li>
<li>http://www.prelovac.com/vladimir/improving-security-in-wordpress-plugins-using-nonces</li>
</ul>
<h4>Ajax</h4>
<ul>
<li>http://return-true.com/2010/01/using-ajax-in-your-wordpress-theme-admin/</li>
<li>http://amiworks.co.in/talk/simplified-ajax-for-wordpress-plugin-developers-using-jquery/</li>
<li>http://xplus3.net/2008/10/16/jquery-and-ajax-in-wordpress-plugins-administration-pages/</li>
<li>http://www.garyc40.com/2010/03/5-tips-for-using-ajax-in-wordpress/</li>
</ul>
<h4>Database</h4>
<ul>
<li>http://createmy.com.au/connecting-your-plugin-to-the-wordpress-database/</li>
<li>http://webjawns.com/2009/08/the-wordpress-wpdb-class-explained/</li>
</ul>
<h4>Scheduling</h4>
<ul>
<li>http://wpseek.com/source/wp/latest/nav.html?wp-includes/cron.php.html</li>
<li>Ideas on background processing from the broken link checker</li>
</ul>
<h4>Settings</h4>
<ul>
<li>https://codex.wordpress.org/Settings_API – new way to handle options/settings         </li>
<li>http://ottopress.com/2009/wordpress-settings-api-tutorial/</li>
<li>http://planetozh.com/blog/2009/05/handling-plugins-options-in-wordpress-28-with-register_setting/</li>
<li>http://wpengineer.com/2139/adding-settings-to-an-existing-page-using-the-settings-api/</li>
<li>http://blog.gneu.org/2010/09/intro-to-the-wordpress-settings-api/</li>
<li>http://alisothegeek.com/2011/01/wordpress-settings-api-tutorial-1/</li>
</ul>
<h4>RSS Feeds</h4>
<ul>
<li>http://jaewon.mine.nu/jaewon/2010/10/30/how-to-make-your-wordpress-a-rss-reader/</li>
<li>https://codex.wordpress.org/Plugin_API/Filter_Reference/wp_feed_cache_transient_lifetime</li>
<li>http://simplepie.org/</li>
</ul>


RSS Feed Checker

The RSS Feed checker looks through your blogroll for links with rss feeds and captures the details to be shown in a widget.

petermolnar

<p>The plugin re-activates the long forgotten <a href="https://en.support.wordpress.com/blogroll/" rel="nofollow ugc">blogroll or links</a> section of WordPress in order to turn your site to an <a href="http://www.aaronsw.com/weblog/001148" rel="nofollow ugc">rss2email</a>-like service.</p>
<h4>How it works:</h4>
<ul>
<li>all links that has their RSS link filled in will pull the RSS feed of those sites</li>
<li>those links that does not yet have RSS will be parsed as <a href="http://microformats.org/" rel="nofollow ugc">Microformats 2</a>
<ul>
<li>in case the site has an RSS alternate link, the plugin will fill this information in and use the RSS instead of the microformats parser</li>
</ul>
</li>
<li>the link names will be updated based on the feed name automatically</li>
<li>all the parsed entries since the last check will be sent to the link owner’s email address as HTML mails with the following additional header:
<ul>
<li><code>X-RSS-ID</code> with the link URL</li>
<li><code>X-RSS-URL</code> with the link URL</li>
<li><code>X-RSS-Feed</code> with the feed URL</li>
<li><code>User-Agent</code> with blogroll2email,</li>
<li>these are in place in order for filter script to work</li>
</ul>
</li>
<li>the revisit time is 30minutes ( not changeable yet )</li>
<li>the plugin uses WordPress Cron</li>
</ul>
<h4>Credit</h4>
<ul>
<li>thank you for <a href="https://github.com/indieweb/php-mf2/" rel="nofollow ugc">PHP Mf2 parser</a> from <a href="https://waterpigs.co.uk/" rel="nofollow ugc">Barnaby Walters</a></li>
</ul>


RSS Feed Checker vs blogroll2email