Retrieves default data about the avatar.

Retrieves the avatar URL.

Retrieves an array of the class names for the post container element.

Retrieves the terms in a given taxonomy or list of taxonomies.

Checks whether a header image is set or not.

Determines whether the current post uses a page template.

If a table only contains utf8 or utf8mb4 columns, convert it to utf8mb4.

Downloads an image from the specified URL, saves it as an attachment, and optionally attaches it to a post.

Output JavaScript to toggle display of additional settings if avatars are disabled.

Prints the inline Emoji detection script if it is not already printed.