Title: Functions | Page 3 of 49 | Developer.WordPress.org --- # Functions * function[add_theme_page()](https://developer.wordpress.org/reference/functions/add_theme_page/) * Adds a submenu page to the Appearance main menu. * Used by [2 functions](https://developer.wordpress.org/reference/functions/add_theme_page/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/add_theme_page/#uses) | Source: [wp-admin/includes/plugin.php:1647](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/plugin.php#L1647-L1649) * function[add_theme_support()](https://developer.wordpress.org/reference/functions/add_theme_support/) * Registers theme support for a given feature. * Used by [12 functions](https://developer.wordpress.org/reference/functions/add_theme_support/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/add_theme_support/#uses) | Source: [wp-includes/theme.php:2693](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/theme.php#L2693-L2943) * function[add_thickbox()](https://developer.wordpress.org/reference/functions/add_thickbox/) * Enqueues the default ThickBox js and css. * Used by [1 function](https://developer.wordpress.org/reference/functions/add_thickbox/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/add_thickbox/#uses) | Source: [wp-includes/general-template.php:5127](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/general-template.php#L5127-L5134) * function[add_user()](https://developer.wordpress.org/reference/functions/add_user/) * Creates a new user from the “Users” form using $_POST information. * Used by [0 functions](https://developer.wordpress.org/reference/functions/add_user/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/add_user/#uses) | Source: [wp-admin/includes/user.php:16](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/user.php#L16-L18) * function[add_users_page()](https://developer.wordpress.org/reference/functions/add_users_page/) * Adds a submenu page to the Users/Profile main menu. * Used by [0 functions](https://developer.wordpress.org/reference/functions/add_users_page/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/add_users_page/#uses) | Source: [wp-admin/includes/plugin.php:1695](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/plugin.php#L1695-L1702) * function[add_user_meta()](https://developer.wordpress.org/reference/functions/add_user_meta/) * Adds meta data to a user. * Used by [2 functions](https://developer.wordpress.org/reference/functions/add_user_meta/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/add_user_meta/#uses) | Source: [wp-includes/user.php:1229](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/user.php#L1229-L1231) * function[add_user_to_blog()](https://developer.wordpress.org/reference/functions/add_user_to_blog/) * Adds a user to a blog, along with specifying the user’s role. * Used by [5 functions](https://developer.wordpress.org/reference/functions/add_user_to_blog/#used-by) | Uses [13 functions](https://developer.wordpress.org/reference/functions/add_user_to_blog/#uses) | Source: [wp-includes/ms-functions.php:161](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-functions.php#L161-L219) * function[add_utility_page()](https://developer.wordpress.org/reference/functions/add_utility_page/) * Add a top-level menu page in the ‘utility’ section. * Used by [0 functions](https://developer.wordpress.org/reference/functions/add_utility_page/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/add_utility_page/#uses) | Source: [wp-admin/includes/deprecated.php:1471](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/deprecated.php#L1471-L1479) * function[adjacent_image_link()](https://developer.wordpress.org/reference/functions/adjacent_image_link/) * Displays next or previous image link that has the same post parent. * Used by [0 functions](https://developer.wordpress.org/reference/functions/adjacent_image_link/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/adjacent_image_link/#uses) | Source: [wp-includes/media.php:4008](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/media.php#L4008-L4010) * function[adjacent_posts_rel_link()](https://developer.wordpress.org/reference/functions/adjacent_posts_rel_link/) * Displays the relational links for the posts adjacent to the current post. * Used by [1 function](https://developer.wordpress.org/reference/functions/adjacent_posts_rel_link/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/adjacent_posts_rel_link/#uses) | Source: [wp-includes/link-template.php:2125](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L2125-L2128) * function[adjacent_posts_rel_link_wp_head()](https://developer.wordpress.org/reference/functions/adjacent_posts_rel_link_wp_head/) * Displays relational links for the posts adjacent to the current post for single post pages. * Used by [0 functions](https://developer.wordpress.org/reference/functions/adjacent_posts_rel_link_wp_head/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/adjacent_posts_rel_link_wp_head/#uses) | Source: [wp-includes/link-template.php:2141](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L2141-L2146) * function[adjacent_post_link()](https://developer.wordpress.org/reference/functions/adjacent_post_link/) * Displays the adjacent post link. * Used by [0 functions](https://developer.wordpress.org/reference/functions/adjacent_post_link/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/adjacent_post_link/#uses) | Source: [wp-includes/link-template.php:2416](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L2416-L2418) * function[admin_color_scheme_picker()](https://developer.wordpress.org/reference/functions/admin_color_scheme_picker/) * Displays the default administration color scheme picker (Used in user-edit.php). * Used by [0 functions](https://developer.wordpress.org/reference/functions/admin_color_scheme_picker/#used-by) | Uses [8 functions](https://developer.wordpress.org/reference/functions/admin_color_scheme_picker/#uses) | Source: [wp-admin/includes/misc.php:1004](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/misc.php#L1004-L1057) * function[admin_created_user_email()](https://developer.wordpress.org/reference/functions/admin_created_user_email/) * Used by [0 functions](https://developer.wordpress.org/reference/functions/admin_created_user_email/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/admin_created_user_email/#uses) | Source: [wp-admin/includes/user.php:608](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/user.php#L608-L634) * function[admin_url()](https://developer.wordpress.org/reference/functions/admin_url/) * Retrieves the URL to the admin area for the current site. * Used by [119 functions](https://developer.wordpress.org/reference/functions/admin_url/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/admin_url/#uses) | Source: [wp-includes/link-template.php:3573](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L3573-L3575) * function[allowed_http_request_hosts()](https://developer.wordpress.org/reference/functions/allowed_http_request_hosts/) * Marks allowed redirect hosts safe for HTTP requests as well. * Used by [0 functions](https://developer.wordpress.org/reference/functions/allowed_http_request_hosts/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/allowed_http_request_hosts/#uses) | Source: [wp-includes/http.php:662](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/http.php#L662-L667) * function[allowed_tags()](https://developer.wordpress.org/reference/functions/allowed_tags/) * Displays all of the allowed tags in HTML format with attributes. * Used by [0 functions](https://developer.wordpress.org/reference/functions/allowed_tags/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/allowed_tags/#uses) | Source: [wp-includes/general-template.php:2637](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/general-template.php#L2637-L2650) * function[allow_subdirectory_install()](https://developer.wordpress.org/reference/functions/allow_subdirectory_install/) * Allow subdirectory installation. * Used by [2 functions](https://developer.wordpress.org/reference/functions/allow_subdirectory_install/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/allow_subdirectory_install/#uses) | Source: [wp-admin/includes/network.php:54](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/network.php#L54-L79) * function[allow_subdomain_install()](https://developer.wordpress.org/reference/functions/allow_subdomain_install/) * Allow subdomain installation * Used by [2 functions](https://developer.wordpress.org/reference/functions/allow_subdomain_install/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/allow_subdomain_install/#uses) | Source: [wp-admin/includes/network.php:35](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/network.php#L35-L43) * function[antispambot()](https://developer.wordpress.org/reference/functions/antispambot/) * Converts email addresses characters to HTML entities to block spam bots. * Used by [0 functions](https://developer.wordpress.org/reference/functions/antispambot/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/antispambot/#uses) | Source: [wp-includes/formatting.php:2912](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/formatting.php#L2912-L2928) * function[apache_mod_loaded()](https://developer.wordpress.org/reference/functions/apache_mod_loaded/) * Determines whether the specified module exist in the Apache config. * Used by [2 functions](https://developer.wordpress.org/reference/functions/apache_mod_loaded/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/apache_mod_loaded/#uses) | Source: [wp-includes/functions.php:6198](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L6198-L6229) * function[apply_block_hooks_to_content()](https://developer.wordpress.org/reference/functions/apply_block_hooks_to_content/) * Runs the hooked blocks algorithm on the given content. * Used by [9 functions](https://developer.wordpress.org/reference/functions/apply_block_hooks_to_content/#used-by) | Uses [12 functions](https://developer.wordpress.org/reference/functions/apply_block_hooks_to_content/#uses) | Source: [wp-includes/blocks.php:1102](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/blocks.php#L1102-L1188) * function[apply_block_hooks_to_content_from_post_object()](https://developer.wordpress.org/reference/functions/apply_block_hooks_to_content_from_post_object/) * Run the Block Hooks algorithm on a post object’s content. * Used by [1 function](https://developer.wordpress.org/reference/functions/apply_block_hooks_to_content_from_post_object/#used-by) | Uses [10 functions](https://developer.wordpress.org/reference/functions/apply_block_hooks_to_content_from_post_object/#uses) | Source: [wp-includes/blocks.php:1214](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/blocks.php#L1214-L1324) * function[apply_filters()](https://developer.wordpress.org/reference/functions/apply_filters/) * Calls the callback functions that have been added to a filter hook. * Used by [1368 functions](https://developer.wordpress.org/reference/functions/apply_filters/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/apply_filters/#uses) | Source: [wp-includes/plugin.php:173](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/plugin.php#L173-L210) * function[apply_filters_deprecated()](https://developer.wordpress.org/reference/functions/apply_filters_deprecated/) * Fires functions attached to a deprecated filter hook. * Used by [25 functions](https://developer.wordpress.org/reference/functions/apply_filters_deprecated/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/apply_filters_deprecated/#uses) | Source: [wp-includes/plugin.php:722](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/plugin.php#L722-L730) * function[apply_filters_ref_array()](https://developer.wordpress.org/reference/functions/apply_filters_ref_array/) * Calls the callback functions that have been added to a filter hook, specifying arguments in an array. * Used by [12 functions](https://developer.wordpress.org/reference/functions/apply_filters_ref_array/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/apply_filters_ref_array/#uses) | Source: [wp-includes/plugin.php:228](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/plugin.php#L228-L261) * function[apply_shortcodes()](https://developer.wordpress.org/reference/functions/apply_shortcodes/) * Searches content for shortcodes and filter shortcodes through their hooks. * Used by [0 functions](https://developer.wordpress.org/reference/functions/apply_shortcodes/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/apply_shortcodes/#uses) | Source: [wp-includes/shortcodes.php:223](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/shortcodes.php#L223-L225) * function[atom_enclosure()](https://developer.wordpress.org/reference/functions/atom_enclosure/) * Displays the atom enclosure for the current post. * Used by [0 functions](https://developer.wordpress.org/reference/functions/atom_enclosure/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/atom_enclosure/#uses) | Source: [wp-includes/feed.php:519](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L519-L569) * function[atom_site_icon()](https://developer.wordpress.org/reference/functions/atom_site_icon/) * Displays Site Icon in atom feeds. * Used by [0 functions](https://developer.wordpress.org/reference/functions/atom_site_icon/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/atom_site_icon/#uses) | Source: [wp-includes/feed.php:632](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L632-L637) * function[attachment_id3_data_meta_box()](https://developer.wordpress.org/reference/functions/attachment_id3_data_meta_box/) * Displays fields for ID3 data. * Used by [0 functions](https://developer.wordpress.org/reference/functions/attachment_id3_data_meta_box/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/attachment_id3_data_meta_box/#uses) | Source: [wp-admin/includes/meta-boxes.php:1504](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/meta-boxes.php#L1504-L1522) [Previous Page](https://developer.wordpress.org/reference/functions/page/2/?output_format=md) [1](https://developer.wordpress.org/reference/functions/?output_format=md) [2](https://developer.wordpress.org/reference/functions/page/2/?output_format=md) 3 [4](https://developer.wordpress.org/reference/functions/page/4/?output_format=md) [5](https://developer.wordpress.org/reference/functions/page/5/?output_format=md)… [49](https://developer.wordpress.org/reference/functions/page/49/?output_format=md) [Next Page](https://developer.wordpress.org/reference/functions/page/4/?output_format=md)