Using WordPress ‘get_category_rss_link()’ PHP function
The `get_category_rss_link()` function retrieves a link to a category's RSS feed in WordPress
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Using WordPress ‘get_avatar()’ PHP function
Retrieves the avatar tag for a user, email address, MD5 hash, comment, or post.
Using WordPress ‘generate_postdata()’ PHP function
The `generate_postdata()` function in WordPress generates post data based on a WP_Post instance or Post ID/object passed as a parameter
Using WordPress ‘get_mu_plugins()’ PHP function
Checks the mu-plugins directory and retrieve all mu-plugin files with any plugin data.