Title: Classes | Page 19 of 20 | Developer.WordPress.org --- # Classes * class[WP_Upgrader](https://developer.wordpress.org/reference/classes/wp_upgrader/) * Core class used for upgrading/installing a local set of files via the Filesystem Abstraction classes from a Zip file. * Used by [4 functions](https://developer.wordpress.org/reference/classes/wp_upgrader/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_upgrader/#uses) | Source: [wp-admin/includes/class-wp-upgrader.php:51](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/class-wp-upgrader.php#L51-L1300) * class[WP_Upgrader_Skin](https://developer.wordpress.org/reference/classes/wp_upgrader_skin/) * Generic Skin for the WordPress Upgrader classes. This skin is designed to be extended for specific purposes. * Used by [7 functions](https://developer.wordpress.org/reference/classes/wp_upgrader_skin/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_upgrader_skin/#uses) | Source: [wp-admin/includes/class-wp-upgrader-skin.php:16](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/class-wp-upgrader-skin.php#L16-L296) * class[WP_URL_Pattern_Prefixer](https://developer.wordpress.org/reference/classes/wp_url_pattern_prefixer/) * Class for prefixing URL patterns. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_url_pattern_prefixer/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_url_pattern_prefixer/#uses) | Source: [wp-includes/class-wp-url-pattern-prefixer.php:18](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-url-pattern-prefixer.php#L18-L135) * class[WP_User](https://developer.wordpress.org/reference/classes/wp_user/) * Core class used to implement the WP_User object. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_user/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_user/#uses) | Source: [wp-includes/class-wp-user.php:41](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-user.php#L41-L920) * class[WP_Users_List_Table](https://developer.wordpress.org/reference/classes/wp_users_list_table/) * Core class used to implement displaying users in a list table. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_users_list_table/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_users_list_table/#uses) | Source: [wp-admin/includes/class-wp-users-list-table.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/class-wp-users-list-table.php#L17-L683) * class[WP_User_Meta_Session_Tokens](https://developer.wordpress.org/reference/classes/wp_user_meta_session_tokens/) * Meta-based user sessions token manager. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_user_meta_session_tokens/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_user_meta_session_tokens/#uses) | Source: [wp-includes/class-wp-user-meta-session-tokens.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-user-meta-session-tokens.php#L17-L130) * class[WP_User_Query](https://developer.wordpress.org/reference/classes/wp_user_query/) * Core class used for querying users. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_user_query/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_user_query/#uses) | Source: [wp-includes/class-wp-user-query.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-user-query.php#L17-L1231) * class[WP_User_Request](https://developer.wordpress.org/reference/classes/wp_user_request/) * WP_User_Request class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_user_request/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_user_request/#uses) | Source: [wp-includes/class-wp-user-request.php:9](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-user-request.php#L9-L121) * class[WP_User_Search](https://developer.wordpress.org/reference/classes/wp_user_search/) * WordPress User Search class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_user_search/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_user_search/#uses) | Source: [wp-admin/includes/deprecated.php:339](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/deprecated.php#L339-L677) * class[WP_Widget](https://developer.wordpress.org/reference/classes/wp_widget/) * Core base class extended to register widgets. * Used by [16 functions](https://developer.wordpress.org/reference/classes/wp_widget/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_widget/#uses) | Source: [wp-includes/class-wp-widget.php:20](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-widget.php#L20-L641) * class[WP_Widget_Archives](https://developer.wordpress.org/reference/classes/wp_widget_archives/) * Core class used to implement the Archives widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_archives/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_archives/#uses) | Source: [wp-includes/widgets/class-wp-widget-archives.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-archives.php#L17-L247) * class[WP_Widget_Area_Customize_Control](https://developer.wordpress.org/reference/classes/wp_widget_area_customize_control/) * Widget Area Customize Control class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_area_customize_control/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_area_customize_control/#uses) | Source: [wp-includes/customize/class-wp-widget-area-customize-control.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/customize/class-wp-widget-area-customize-control.php#L17-L71) * class[WP_Widget_Block](https://developer.wordpress.org/reference/classes/wp_widget_block/) * Core class used to implement a Block widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_block/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_block/#uses) | Source: [wp-includes/widgets/class-wp-widget-block.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-block.php#L17-L232) * class[WP_Widget_Calendar](https://developer.wordpress.org/reference/classes/wp_widget_calendar/) * Core class used to implement the Calendar widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_calendar/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_calendar/#uses) | Source: [wp-includes/widgets/class-wp-widget-calendar.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-calendar.php#L17-L105) * class[WP_Widget_Categories](https://developer.wordpress.org/reference/classes/wp_widget_categories/) * Core class used to implement a Categories widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_categories/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_categories/#uses) | Source: [wp-includes/widgets/class-wp-widget-categories.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-categories.php#L17-L222) * class[WP_Widget_Custom_HTML](https://developer.wordpress.org/reference/classes/wp_widget_custom_html/) * Core class used to implement a Custom HTML widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_custom_html/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_custom_html/#uses) | Source: [wp-includes/widgets/class-wp-widget-custom-html.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-custom-html.php#L17-L340) * class[WP_Widget_Factory](https://developer.wordpress.org/reference/classes/wp_widget_factory/) * Singleton that registers and instantiates WP_Widget classes. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_factory/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_factory/#uses) | Source: [wp-includes/class-wp-widget-factory.php:16](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-widget-factory.php#L16-L141) * class[WP_Widget_Form_Customize_Control](https://developer.wordpress.org/reference/classes/wp_widget_form_customize_control/) * Widget Form Customize Control class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_form_customize_control/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_form_customize_control/#uses) | Source: [wp-includes/customize/class-wp-widget-form-customize-control.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/customize/class-wp-widget-form-customize-control.php#L17-L140) * class[WP_Widget_Links](https://developer.wordpress.org/reference/classes/wp_widget_links/) * Core class used to implement a Links widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_links/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_links/#uses) | Source: [wp-includes/widgets/class-wp-widget-links.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-links.php#L17-L188) * class[WP_Widget_Media](https://developer.wordpress.org/reference/classes/wp_widget_media/) * Core class that implements a media widget. * Used by [4 functions](https://developer.wordpress.org/reference/classes/wp_widget_media/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_media/#uses) | Source: [wp-includes/widgets/class-wp-widget-media.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-media.php#L17-L516) * class[WP_Widget_Media_Audio](https://developer.wordpress.org/reference/classes/wp_widget_media_audio/) * Core class that implements an audio widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_media_audio/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_media_audio/#uses) | Source: [wp-includes/widgets/class-wp-widget-media-audio.php:18](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-media-audio.php#L18-L217) * class[WP_Widget_Media_Gallery](https://developer.wordpress.org/reference/classes/wp_widget_media_gallery/) * Core class that implements a gallery widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_media_gallery/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_media_gallery/#uses) | Source: [wp-includes/widgets/class-wp-widget-media-gallery.php:18](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-media-gallery.php#L18-L261) * class[WP_Widget_Media_Image](https://developer.wordpress.org/reference/classes/wp_widget_media_image/) * Core class that implements an image widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_media_image/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_media_image/#uses) | Source: [wp-includes/widgets/class-wp-widget-media-image.php:18](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-media-image.php#L18-L404) * class[WP_Widget_Media_Video](https://developer.wordpress.org/reference/classes/wp_widget_media_video/) * Core class that implements a video widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_media_video/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_media_video/#uses) | Source: [wp-includes/widgets/class-wp-widget-media-video.php:18](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-media-video.php#L18-L274) * class[WP_Widget_Meta](https://developer.wordpress.org/reference/classes/wp_widget_meta/) * Core class used to implement a Meta widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_meta/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_meta/#uses) | Source: [wp-includes/widgets/class-wp-widget-meta.php:19](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-meta.php#L19-L143) * class[WP_Widget_Pages](https://developer.wordpress.org/reference/classes/wp_widget_pages/) * Core class used to implement a Pages widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_pages/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_pages/#uses) | Source: [wp-includes/widgets/class-wp-widget-pages.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-pages.php#L17-L185) * class[WP_Widget_Recent_Comments](https://developer.wordpress.org/reference/classes/wp_widget_recent_comments/) * Core class used to implement a Recent Comments widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_recent_comments/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_recent_comments/#uses) | Source: [wp-includes/widgets/class-wp-widget-recent-comments.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-recent-comments.php#L17-L213) * class[WP_Widget_Recent_Posts](https://developer.wordpress.org/reference/classes/wp_widget_recent_posts/) * Core class used to implement a Recent Posts widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_recent_posts/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_recent_posts/#uses) | Source: [wp-includes/widgets/class-wp-widget-recent-posts.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-recent-posts.php#L17-L184) * class[WP_Widget_RSS](https://developer.wordpress.org/reference/classes/wp_widget_rss/) * Core class used to implement a RSS widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_rss/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_rss/#uses) | Source: [wp-includes/widgets/class-wp-widget-rss.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-rss.php#L17-L185) * class[WP_Widget_Search](https://developer.wordpress.org/reference/classes/wp_widget_search/) * Core class used to implement a Search widget. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_widget_search/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_widget_search/#uses) | Source: [wp-includes/widgets/class-wp-widget-search.php:17](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets/class-wp-widget-search.php#L17-L94) [Previous Page](https://developer.wordpress.org/reference/classes/page/18/?output_format=md) 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