Retrieves list of users matching criteria.

Get users for the site.

Checks if the current post has any of given category.

Check if a post has any of the given formats, or any format.

Checks if the current post has any of given terms.

Retrieves the list of WordPress theme features (aka theme tags).

Determines whether the admin bar should be showing.

Whether the current request is for a site’s administrative interface.

Whether the current request is for the network administrative interface.

Determines whether the plugin is inactive.