Title: Functions | Page 13 of 49 | Developer.WordPress.org --- # Functions * function[export_wp()](https://developer.wordpress.org/reference/functions/export_wp/) * Generates the WXR export file for download. * Used by [0 functions](https://developer.wordpress.org/reference/functions/export_wp/#used-by) | Uses [42 functions](https://developer.wordpress.org/reference/functions/export_wp/#uses) | Source: [wp-admin/includes/export.php:57](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/export.php#L57-L741) * function[extract_from_markers()](https://developer.wordpress.org/reference/functions/extract_from_markers/) * Extracts strings from between the BEGIN and END markers in the .htaccess file. * Used by [0 functions](https://developer.wordpress.org/reference/functions/extract_from_markers/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/extract_from_markers/#uses) | Source: [wp-admin/includes/misc.php:68](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/misc.php#L68-L98) * function[extract_serialized_parent_block()](https://developer.wordpress.org/reference/functions/extract_serialized_parent_block/) * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the wrapper block. * Used by [1 function](https://developer.wordpress.org/reference/functions/extract_serialized_parent_block/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/extract_serialized_parent_block/#uses) | Source: [wp-includes/blocks.php:1335](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/blocks.php#L1335-L1339) * function[favorite_actions()](https://developer.wordpress.org/reference/functions/favorite_actions/) * Favorite actions were deprecated in version 3.2. Use the admin bar instead. * Used by [0 functions](https://developer.wordpress.org/reference/functions/favorite_actions/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/favorite_actions/#uses) | Source: [wp-admin/includes/deprecated.php:876](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/deprecated.php#L876-L878) * function[feed_content_type()](https://developer.wordpress.org/reference/functions/feed_content_type/) * Returns the content type for specified feed type. * Used by [3 functions](https://developer.wordpress.org/reference/functions/feed_content_type/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/feed_content_type/#uses) | Source: [wp-includes/feed.php:768](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/feed.php#L768-L792) * function[feed_links()](https://developer.wordpress.org/reference/functions/feed_links/) * Displays the links to the general feeds. * Used by [0 functions](https://developer.wordpress.org/reference/functions/feed_links/#used-by) | Uses [11 functions](https://developer.wordpress.org/reference/functions/feed_links/#uses) | Source: [wp-includes/general-template.php:3239](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/general-template.php#L3239-L3295) * function[feed_links_extra()](https://developer.wordpress.org/reference/functions/feed_links_extra/) * Displays the links to the extra feeds such as category feeds. * Used by [0 functions](https://developer.wordpress.org/reference/functions/feed_links_extra/#used-by) | Uses [31 functions](https://developer.wordpress.org/reference/functions/feed_links_extra/#uses) | Source: [wp-includes/general-template.php:3304](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/general-template.php#L3304-L3535) * function[fetch_feed()](https://developer.wordpress.org/reference/functions/fetch_feed/) * Builds SimplePie object based on RSS or Atom feed from URL. * Used by [5 functions](https://developer.wordpress.org/reference/functions/fetch_feed/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/fetch_feed/#uses) | Source: [wp-includes/feed.php:804](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/feed.php#L804-L910) * function[fetch_rss()](https://developer.wordpress.org/reference/functions/fetch_rss/) * Build Magpie object based on RSS from URL. * Used by [2 functions](https://developer.wordpress.org/reference/functions/fetch_rss/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/fetch_rss/#uses) | Source: [wp-includes/rss.php:412](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/rss.php#L412-L536) * function[file_is_displayable_image()](https://developer.wordpress.org/reference/functions/file_is_displayable_image/) * Validates that file is suitable for displaying within a web page. * Used by [1 function](https://developer.wordpress.org/reference/functions/file_is_displayable_image/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/file_is_displayable_image/#uses) | Source: [wp-admin/includes/image.php:1098](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/image.php#L1098-L1119) * function[file_is_valid_image()](https://developer.wordpress.org/reference/functions/file_is_valid_image/) * Validates that file is an image. * Used by [0 functions](https://developer.wordpress.org/reference/functions/file_is_valid_image/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/file_is_valid_image/#uses) | Source: [wp-admin/includes/image.php:1085](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/image.php#L1085-L1088) * function[filter_add_preload_paths()](https://developer.wordpress.org/reference/functions/filter_add_preload_paths/) * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_add_preload_paths/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/filter_add_preload_paths/#uses) | Source: :613 * function[filter_allowed_block_types_my_editor()](https://developer.wordpress.org/reference/functions/filter_allowed_block_types_my_editor/) * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_allowed_block_types_my_editor/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/filter_allowed_block_types_my_editor/#uses) | Source: :364 * function[filter_block_categories_my_editor()](https://developer.wordpress.org/reference/functions/filter_block_categories_my_editor/) * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_block_categories_my_editor/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/filter_block_categories_my_editor/#uses) | Source: :367 * function[filter_block_content()](https://developer.wordpress.org/reference/functions/filter_block_content/) * Filters and sanitizes block content to remove non-allowable HTML from parsed block attribute values. * Used by [1 function](https://developer.wordpress.org/reference/functions/filter_block_content/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/filter_block_content/#uses) | Source: [wp-includes/blocks.php:2006](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/blocks.php#L2006-L2020) * function[filter_block_core_template_part_attributes()](https://developer.wordpress.org/reference/functions/filter_block_core_template_part_attributes/) * Sanitizes the value of the Template Part block’s `tagName` attribute. * Used by [1 function](https://developer.wordpress.org/reference/functions/filter_block_core_template_part_attributes/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/filter_block_core_template_part_attributes/#uses) | Source: [wp-includes/blocks.php:2111](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/blocks.php#L2111-L2119) * function[filter_block_editor_settings_my_editor()](https://developer.wordpress.org/reference/functions/filter_block_editor_settings_my_editor/) * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_block_editor_settings_my_editor/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/filter_block_editor_settings_my_editor/#uses) | Source: :376 * function[filter_block_kses()](https://developer.wordpress.org/reference/functions/filter_block_kses/) * Filters and sanitizes a parsed block to remove non-allowable HTML from block attribute values. * Used by [2 functions](https://developer.wordpress.org/reference/functions/filter_block_kses/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/filter_block_kses/#uses) | Source: [wp-includes/blocks.php:2049](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/blocks.php#L2049-L2059) * function[filter_block_kses_value()](https://developer.wordpress.org/reference/functions/filter_block_kses_value/) * Filters and sanitizes a parsed block attribute value to remove non-allowable HTML. * Used by [2 functions](https://developer.wordpress.org/reference/functions/filter_block_kses_value/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/filter_block_kses_value/#uses) | Source: [wp-includes/blocks.php:2077](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/blocks.php#L2077-L2097) * function[filter_default_metadata()](https://developer.wordpress.org/reference/functions/filter_default_metadata/) * Filters into default_{$object_type}_metadata and adds in default value. * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_default_metadata/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/filter_default_metadata/#uses) | Source: [wp-includes/meta.php:1584](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/meta.php#L1584-L1626) * function[filter_default_option()](https://developer.wordpress.org/reference/functions/filter_default_option/) * Filters the default value for the option. * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_default_option/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/filter_default_option/#uses) | Source: [wp-includes/option.php:3239](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/option.php#L3239-L3250) * function[filter_remove_preload_paths()](https://developer.wordpress.org/reference/functions/filter_remove_preload_paths/) * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_remove_preload_paths/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/filter_remove_preload_paths/#uses) | Source: :587 * function[filter_SSL()](https://developer.wordpress.org/reference/functions/filter_ssl/) * Formats a URL to use https. * Used by [0 functions](https://developer.wordpress.org/reference/functions/filter_ssl/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/filter_ssl/#uses) | Source: [wp-includes/ms-functions.php:2448](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/ms-functions.php#L2448-L2458) * function[find_core_auto_update()](https://developer.wordpress.org/reference/functions/find_core_auto_update/) * Gets the best available (and enabled) Auto-Update for WordPress core. * Used by [1 function](https://developer.wordpress.org/reference/functions/find_core_auto_update/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/find_core_auto_update/#uses) | Source: [wp-admin/includes/update.php:93](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/update.php#L93-L120) * function[find_core_update()](https://developer.wordpress.org/reference/functions/find_core_update/) * Finds the available update for WordPress core. * Used by [3 functions](https://developer.wordpress.org/reference/functions/find_core_update/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/find_core_update/#uses) | Source: [wp-admin/includes/update.php:221](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/update.php#L221-L237) * function[find_posts_div()](https://developer.wordpress.org/reference/functions/find_posts_div/) * Outputs the modal window used for attaching media to posts or pages in the media- listing screen. * Used by [0 functions](https://developer.wordpress.org/reference/functions/find_posts_div/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/find_posts_div/#uses) | Source: [wp-admin/includes/template.php:2027](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/template.php#L2027-L2065) * function[fix_import_form_size()](https://developer.wordpress.org/reference/functions/fix_import_form_size/) * Gets the remaining upload space for this site. * Used by [0 functions](https://developer.wordpress.org/reference/functions/fix_import_form_size/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/fix_import_form_size/#uses) | Source: [wp-admin/includes/ms.php:280](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/ms.php#L280-L286) * function[fix_phpmailer_messageid()](https://developer.wordpress.org/reference/functions/fix_phpmailer_messageid/) * Corrects From host on outgoing mail to match the site domain. * Used by [0 functions](https://developer.wordpress.org/reference/functions/fix_phpmailer_messageid/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/fix_phpmailer_messageid/#uses) | Source: [wp-includes/ms-functions.php:2335](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/ms-functions.php#L2335-L2337) * function[floated_admin_avatar()](https://developer.wordpress.org/reference/functions/floated_admin_avatar/) * Adds avatars to relevant places in admin. * Used by [0 functions](https://developer.wordpress.org/reference/functions/floated_admin_avatar/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/floated_admin_avatar/#uses) | Source: [wp-admin/includes/comment.php:195](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/comment.php#L195-L198) * function[flush_rewrite_rules()](https://developer.wordpress.org/reference/functions/flush_rewrite_rules/) * Removes rewrite rules and then recreate rewrite rules. * Used by [4 functions](https://developer.wordpress.org/reference/functions/flush_rewrite_rules/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/flush_rewrite_rules/#uses) | Source: [wp-includes/rewrite.php:278](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/rewrite.php#L278-L284) [Previous Page](https://developer.wordpress.org/reference/functions/page/12/?output_format=md) [1](https://developer.wordpress.org/reference/functions/?output_format=md) … [11](https://developer.wordpress.org/reference/functions/page/11/?output_format=md) [12](https://developer.wordpress.org/reference/functions/page/12/?output_format=md) 13 [14](https://developer.wordpress.org/reference/functions/page/14/?output_format=md) 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