Title: Classes | Page 12 of 20 | Developer.WordPress.org --- # Classes * class[WP_Customize_Site_Icon_Control](https://developer.wordpress.org/reference/classes/wp_customize_site_icon_control/) * Customize Site Icon control class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_customize_site_icon_control/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_customize_site_icon_control/#uses) | Source: [wp-includes/customize/class-wp-customize-site-icon-control.php:19](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/customize/class-wp-customize-site-icon-control.php#L19-L143) * class[WP_Customize_Themes_Panel](https://developer.wordpress.org/reference/classes/wp_customize_themes_panel/) * Customize Themes Panel Class * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_customize_themes_panel/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_customize_themes_panel/#uses) | Source: [wp-includes/customize/class-wp-customize-themes-panel.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/customize/class-wp-customize-themes-panel.php#L17-L113) * class[WP_Customize_Themes_Section](https://developer.wordpress.org/reference/classes/wp_customize_themes_section/) * Customize Themes Section class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_customize_themes_section/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_customize_themes_section/#uses) | Source: [wp-includes/customize/class-wp-customize-themes-section.php:19](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/customize/class-wp-customize-themes-section.php#L19-L208) * class[WP_Customize_Theme_Control](https://developer.wordpress.org/reference/classes/wp_customize_theme_control/) * Customize Theme Control class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_customize_theme_control/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_customize_theme_control/#uses) | Source: [wp-includes/customize/class-wp-customize-theme-control.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/customize/class-wp-customize-theme-control.php#L17-L322) * class[WP_Customize_Upload_Control](https://developer.wordpress.org/reference/classes/wp_customize_upload_control/) * Customize Upload Control Class. * Used by [1 function](https://developer.wordpress.org/reference/classes/wp_customize_upload_control/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_customize_upload_control/#uses) | Source: [wp-includes/customize/class-wp-customize-upload-control.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/customize/class-wp-customize-upload-control.php#L17-L65) * class[WP_Customize_Widgets](https://developer.wordpress.org/reference/classes/wp_customize_widgets/) * Customize Widgets class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_customize_widgets/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_customize_widgets/#uses) | Source: [wp-includes/class-wp-customize-widgets.php:19](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-customize-widgets.php#L19-L2253) * class[WP_Date_Query](https://developer.wordpress.org/reference/classes/wp_date_query/) * Class for generating SQL clauses that filter a primary query according to date. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_date_query/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_date_query/#uses) | Source: [wp-includes/class-wp-date-query.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-date-query.php#L17-L1075) * class[WP_Debug_Data](https://developer.wordpress.org/reference/classes/wp_debug_data/) * Class for providing debug data based on a users WordPress environment. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_debug_data/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_debug_data/#uses) | Source: [wp-admin/includes/class-wp-debug-data.php:10](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/class-wp-debug-data.php#L10-L2080) * class[WP_Dependencies](https://developer.wordpress.org/reference/classes/wp_dependencies/) * Core base class extended to register items. * Used by [2 functions](https://developer.wordpress.org/reference/classes/wp_dependencies/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_dependencies/#uses) | Source: [wp-includes/class-wp-dependencies.php:18](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-dependencies.php#L18-L578) * class[WP_Duotone](https://developer.wordpress.org/reference/classes/wp_duotone/) * Manages duotone block supports and global styles. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_duotone/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_duotone/#uses) | Source: [wp-includes/class-wp-duotone.php:40](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-duotone.php#L40-L1350) * class[WP_Embed](https://developer.wordpress.org/reference/classes/wp_embed/) * API for easily embedding rich media such as videos and images into content. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_embed/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_embed/#uses) | Source: [wp-includes/class-wp-embed.php:9](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-embed.php#L9-L536) * class[WP_Error](https://developer.wordpress.org/reference/classes/wp_error/) * WordPress Error class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_error/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_error/#uses) | Source: [wp-includes/class-wp-error.php:18](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-error.php#L18-L313) * class[WP_Exception](https://developer.wordpress.org/reference/classes/wp_exception/) * Core base Exception class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_exception/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_exception/#uses) | Source: [wp-includes/class-wp-exception.php:16](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-exception.php#L16-L16) * class[WP_Fatal_Error_Handler](https://developer.wordpress.org/reference/classes/wp_fatal_error_handler/) * Core class used as the default shutdown handler for fatal errors. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_fatal_error_handler/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_fatal_error_handler/#uses) | Source: [wp-includes/class-wp-fatal-error-handler.php:19](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-fatal-error-handler.php#L19-L247) * class[WP_Feed_Cache](https://developer.wordpress.org/reference/classes/wp_feed_cache/) * Core class used to implement a feed cache. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_feed_cache/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_feed_cache/#uses) | Source: [wp-includes/class-wp-feed-cache.php:23](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-feed-cache.php#L23-L39) * class[WP_Feed_Cache_Transient](https://developer.wordpress.org/reference/classes/wp_feed_cache_transient/) * Core class used to implement feed cache transients. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_feed_cache_transient/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_feed_cache_transient/#uses) | Source: [wp-includes/class-wp-feed-cache-transient.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-feed-cache-transient.php#L17-L138) * class[WP_Filesystem_Base](https://developer.wordpress.org/reference/classes/wp_filesystem_base/) * Base WordPress Filesystem class which Filesystem implementations extend. * Used by [4 functions](https://developer.wordpress.org/reference/classes/wp_filesystem_base/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_filesystem_base/#uses) | Source: [wp-admin/includes/class-wp-filesystem-base.php:31](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/class-wp-filesystem-base.php#L31-L888) * class[WP_Filesystem_Direct](https://developer.wordpress.org/reference/classes/wp_filesystem_direct/) * WordPress Filesystem Class for direct PHP file and folder manipulation. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_filesystem_direct/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_filesystem_direct/#uses) | Source: [wp-admin/includes/class-wp-filesystem-direct.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/class-wp-filesystem-direct.php#L17-L717) * class[WP_Filesystem_FTPext](https://developer.wordpress.org/reference/classes/wp_filesystem_ftpext/) * WordPress Filesystem Class for implementing FTP. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_filesystem_ftpext/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_filesystem_ftpext/#uses) | Source: [wp-admin/includes/class-wp-filesystem-ftpext.php:24](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/class-wp-filesystem-ftpext.php#L24-L897) * class[WP_Filesystem_ftpsockets](https://developer.wordpress.org/reference/classes/wp_filesystem_ftpsockets/) * WordPress Filesystem Class for implementing FTP Sockets. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_filesystem_ftpsockets/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_filesystem_ftpsockets/#uses) | Source: [wp-admin/includes/class-wp-filesystem-ftpsockets.php:23](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/class-wp-filesystem-ftpsockets.php#L23-L784) * class[WP_Filesystem_SSH2](https://developer.wordpress.org/reference/classes/wp_filesystem_ssh2/) * WordPress Filesystem Class for implementing SSH2 * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_filesystem_ssh2/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/classes/wp_filesystem_ssh2/#uses) | Source: [wp-admin/includes/class-wp-filesystem-ssh2.php:47](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/class-wp-filesystem-ssh2.php#L47-L905) * class[WP_Filter_Sentinel](https://developer.wordpress.org/reference/classes/wp_filter_sentinel/) * Marker object used as a filter’s default value when any user value — including` null`, `false`, or arbitrary objects — must remain distinguishable from the “ no filter modified this” case. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_filter_sentinel/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_filter_sentinel/#uses) | Source: [wp-includes/class-wp-filter-sentinel.php:25](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-filter-sentinel.php#L25-L25) * class[WP_Font_Collection](https://developer.wordpress.org/reference/classes/wp_font_collection/) * Font Collection class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_font_collection/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_font_collection/#uses) | Source: [wp-includes/fonts/class-wp-font-collection.php:19](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/fonts/class-wp-font-collection.php#L19-L295) * class[WP_Font_Face](https://developer.wordpress.org/reference/classes/wp_font_face/) * Font Face generates and prints `@font-face` styles for given fonts. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_font_face/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_font_face/#uses) | Source: [wp-includes/fonts/class-wp-font-face.php:15](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/fonts/class-wp-font-face.php#L15-L379) * class[WP_Font_Face_Resolver](https://developer.wordpress.org/reference/classes/wp_font_face_resolver/) * The Font Face Resolver abstracts the processing of different data sources (such as theme.json) for processing within the Font Face. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_font_face_resolver/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_font_face_resolver/#uses) | Source: [wp-includes/fonts/class-wp-font-face-resolver.php:19](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/fonts/class-wp-font-face-resolver.php#L19-L205) * class[WP_Font_Library](https://developer.wordpress.org/reference/classes/wp_font_library/) * Font Library class. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_font_library/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_font_library/#uses) | Source: [wp-includes/fonts/class-wp-font-library.php:17](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/fonts/class-wp-font-library.php#L17-L142) * class[WP_Font_Utils](https://developer.wordpress.org/reference/classes/wp_font_utils/) * A class of utilities for working with the Font Library. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_font_utils/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_font_utils/#uses) | Source: [wp-includes/fonts/class-wp-font-utils.php:20](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/fonts/class-wp-font-utils.php#L20-L259) * class[WP_Hook](https://developer.wordpress.org/reference/classes/wp_hook/) * Core class used to implement action and filter hook functionality. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_hook/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_hook/#uses) | Source: [wp-includes/class-wp-hook.php:26](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-hook.php#L26-L618) * class[WP_HTML_Active_Formatting_Elements](https://developer.wordpress.org/reference/classes/wp_html_active_formatting_elements/) * Core class used by the HTML processor during HTML parsing for managing the stack of active formatting elements. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_html_active_formatting_elements/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_html_active_formatting_elements/#uses) | Source: [wp-includes/html-api/class-wp-html-active-formatting-elements.php:36](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/html-api/class-wp-html-active-formatting-elements.php#L36-L229) * class[WP_HTML_Attribute_Token](https://developer.wordpress.org/reference/classes/wp_html_attribute_token/) * Core class used by the HTML tag processor as a data structure for the attribute token, allowing to drastically improve performance. * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_html_attribute_token/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/classes/wp_html_attribute_token/#uses) | Source: [wp-includes/html-api/class-wp-html-attribute-token.php:22](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/html-api/class-wp-html-attribute-token.php#L22-L116) [Previous 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