Using WordPress ‘get_registered_meta_keys()’ PHP function
Retrieves a list of registered metadata args for an object type, keyed by their meta keys.
WordPress
Using WordPress ‘get_search_template()’ PHP function
Retrieves path of search template in current or parent template.
Using WordPress ‘get_search_comments_feed_link()’ PHP function
Retrieves the permalink for the search results comments feed.
Using WordPress ‘get_rss()’ PHP function
Learn how to use the WordPress 'get_rss' function to display RSS items in an HTML list