Classes (category)

Walker{}

A class for displaying various tree-like structures.
Walker_Nav_Menu{}

The core class of WordPress that generates the HTML code for the navigation menu items list of WordPress.
WP_Admin_Bar{}

Core class used to implement the Toolbar API.
WP_Comment_Query{}

Core class used for querying comments.
WP_Date_Query{}

Class for generating SQL clauses that filter a primary query according to date.
WP_Error{}

WordPress Error class.
WP_List_Table{}

Base class for displaying a list of items in an ajaxified HTML table.
WP_List_Util{}

List utility.
WP_Meta_Query{}

The class creates JOIN and WHERE parts of the SQL query, which, in addition to the main query, will filter the result by the specified key and value of the meta-field.
WP_Post_Type{}

Core class used for interacting with post types.
WP_Query{}

The WordPress Query class. Selects posts from the database based on the specified parameters. get_posts(), query_posts() and all other query functions for posts selection from wp_posts table are based on this class.
WP_Rewrite{}

Core class used to implement a rewrite component API.
WP_Sitemaps_Provider{}

Class WP_Sitemaps_Provider.
WP_Term{}

Core class used to implement the WP_Term object.
WP_Term_Query{}

Class used for querying terms.
WP_User{}

Core class used to implement the WP_User object.
WP_Widget_Archives{}

Core class used to implement the Archives widget.
wpdb{}

Allows performing any operations with the WordPress database: inserting, updating, retrieving, or deleting data.