Using WordPress ‘get_the_guid()’ PHP function
The `get_the_guid()` function retrieves the Post Global Unique Identifier (guid) using WordPress
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Using WordPress ‘get_the_author_nickname()’ PHP function
Retrieve the nickname of the author of the current post.
Using WordPress ‘is_avatar_comment_type()’ PHP function
Check if this comment type allows avatars to be retrieved.
Using WordPress ‘require_wp_db()’ PHP function
Load the database class file and instantiate the §wpdb global.