Title: wp-includes/post.php | Page 3 of 9 | Developer.WordPress.org --- # File: wp-includes/post.php * function[wp_attachment_is()](https://developer.wordpress.org/reference/functions/wp_attachment_is/) * Verifies an attachment is of a given type. * Used by [12 functions](https://developer.wordpress.org/reference/functions/wp_attachment_is/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/wp_attachment_is/#uses) | Source: [wp-includes/post.php:7110](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7110-L7153) * function[get_children()](https://developer.wordpress.org/reference/functions/get_children/) * Retrieves all children of the post parent ID. * Used by [7 functions](https://developer.wordpress.org/reference/functions/get_children/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/get_children/#uses) | Source: [wp-includes/post.php:990](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L990-L1046) * hook[post_{$field}](https://developer.wordpress.org/reference/hooks/post_field/) * Filters the value of a specific post field for display. * Used by [1 function](https://developer.wordpress.org/reference/hooks/post_field/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/post_field/#uses) | Source: [wp-includes/post.php:3260](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L3260-L3260) * hook[edit_post_{$field}](https://developer.wordpress.org/reference/hooks/edit_post_field/) * Filters the value of a specific post field to edit. * Used by [1 function](https://developer.wordpress.org/reference/hooks/edit_post_field/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/edit_post_field/#uses) | Source: [wp-includes/post.php:3075](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L3075-L3075) * hook[pre_post_{$field}](https://developer.wordpress.org/reference/hooks/pre_post_field/) * Filters the value of a specific field before saving. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_post_field/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_post_field/#uses) | Source: [wp-includes/post.php:3171](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L3171-L3171) * function[get_available_post_mime_types()](https://developer.wordpress.org/reference/functions/get_available_post_mime_types/) * Gets all available post MIME types for a given post type. * Used by [1 function](https://developer.wordpress.org/reference/functions/get_available_post_mime_types/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/get_available_post_mime_types/#uses) | Source: [wp-includes/post.php:8424](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8424-L8443) * function[clean_attachment_cache()](https://developer.wordpress.org/reference/functions/clean_attachment_cache/) * Will clean the attachment in the cache. * Used by [1 function](https://developer.wordpress.org/reference/functions/clean_attachment_cache/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/clean_attachment_cache/#uses) | Source: [wp-includes/post.php:7888](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7888-L7912) * function[wp_delete_auto_drafts()](https://developer.wordpress.org/reference/functions/wp_delete_auto_drafts/) * Deletes auto-drafts for new posts that are > 7 days old. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_delete_auto_drafts/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_delete_auto_drafts/#uses) | Source: [wp-includes/post.php:8150](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8150-L8159) * hook[clean_attachment_cache](https://developer.wordpress.org/reference/hooks/clean_attachment_cache/) * Fires after the given attachment’s cache is cleaned. * Used by [1 function](https://developer.wordpress.org/reference/hooks/clean_attachment_cache/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/clean_attachment_cache/#uses) | Source: [wp-includes/post.php:7911](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7911-L7911) * function[_update_term_count_on_transition_post_status()](https://developer.wordpress.org/reference/functions/_update_term_count_on_transition_post_status/) * Updates the custom taxonomies’ term counts when a post’s status is changed. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_update_term_count_on_transition_post_status/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/_update_term_count_on_transition_post_status/#uses) | Source: [wp-includes/post.php:8222](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8222-L8253) * function[_transition_post_status()](https://developer.wordpress.org/reference/functions/_transition_post_status/) * Hook for managing future post transitions to published. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_transition_post_status/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/_transition_post_status/#uses) | Source: [wp-includes/post.php:7931](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7931-L7967) * function[_prime_post_caches()](https://developer.wordpress.org/reference/functions/_prime_post_caches/) * Adds any posts from the given IDs to the cache that do not already exist in cache. * Used by [10 functions](https://developer.wordpress.org/reference/functions/_prime_post_caches/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/_prime_post_caches/#uses) | Source: [wp-includes/post.php:8271](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8271-L8293) * hook[private_to_published](https://developer.wordpress.org/reference/hooks/private_to_published/) * Fires when a post’s status is transitioned from private to published. * Used by [1 function](https://developer.wordpress.org/reference/hooks/private_to_published/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/private_to_published/#uses) | Source: [wp-includes/post.php:7948](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7948-L7948) * function[_future_post_hook()](https://developer.wordpress.org/reference/functions/_future_post_hook/) * Hook used to schedule publication for a post marked for the future. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_future_post_hook/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/_future_post_hook/#uses) | Source: [wp-includes/post.php:7982](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7982-L7985) * function[_publish_post_hook()](https://developer.wordpress.org/reference/functions/_publish_post_hook/) * Hook to schedule pings and enclosures when a post is published. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_publish_post_hook/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/_publish_post_hook/#uses) | Source: [wp-includes/post.php:7997](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7997-L8026) * function[clean_post_cache()](https://developer.wordpress.org/reference/functions/clean_post_cache/) * Will clean the post in the cache. * Used by [14 functions](https://developer.wordpress.org/reference/functions/clean_post_cache/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/clean_post_cache/#uses) | Source: [wp-includes/post.php:7718](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7718-L7763) * hook[xmlrpc_publish_post](https://developer.wordpress.org/reference/hooks/xmlrpc_publish_post/) * Fires when _publish_post_hook() is called during an XML-RPC request. * Used by [1 function](https://developer.wordpress.org/reference/hooks/xmlrpc_publish_post/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/xmlrpc_publish_post/#uses) | Source: [wp-includes/post.php:8006](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8006-L8006) * hook[clean_post_cache](https://developer.wordpress.org/reference/hooks/clean_post_cache/) * Fires immediately after the given post’s cache is cleaned. * Used by [1 function](https://developer.wordpress.org/reference/hooks/clean_post_cache/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/clean_post_cache/#uses) | Source: [wp-includes/post.php:7747](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7747-L7747) * function[wp_get_post_parent_id()](https://developer.wordpress.org/reference/functions/wp_get_post_parent_id/) * Returns the ID of the post’s parent. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_get_post_parent_id/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_post_parent_id/#uses) | Source: [wp-includes/post.php:8038](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8038-L8046) * hook[clean_page_cache](https://developer.wordpress.org/reference/hooks/clean_page_cache/) * Fires immediately after the given page’s cache is cleaned. * Used by [1 function](https://developer.wordpress.org/reference/hooks/clean_page_cache/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/clean_page_cache/#uses) | Source: [wp-includes/post.php:7759](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7759-L7759) * function[wp_check_post_hierarchy_for_loops()](https://developer.wordpress.org/reference/functions/wp_check_post_hierarchy_for_loops/) * Checks the given subset of the post hierarchy for hierarchy loops. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_check_post_hierarchy_for_loops/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_check_post_hierarchy_for_loops/#uses) | Source: [wp-includes/post.php:8062](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8062-L8100) * function[update_post_caches()](https://developer.wordpress.org/reference/functions/update_post_caches/) * Updates post, term, and metadata caches for a list of post objects. * Used by [1 function](https://developer.wordpress.org/reference/functions/update_post_caches/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/update_post_caches/#uses) | Source: [wp-includes/post.php:7775](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7775-L7814) * function[set_post_thumbnail()](https://developer.wordpress.org/reference/functions/set_post_thumbnail/) * Sets the post thumbnail (featured image) for the given post. * Used by [7 functions](https://developer.wordpress.org/reference/functions/set_post_thumbnail/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/set_post_thumbnail/#uses) | Source: [wp-includes/post.php:8114](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8114-L8125) * function[update_postmeta_cache()](https://developer.wordpress.org/reference/functions/update_postmeta_cache/) * Updates metadata cache for a list of post IDs. * Used by [2 functions](https://developer.wordpress.org/reference/functions/update_postmeta_cache/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/update_postmeta_cache/#uses) | Source: [wp-includes/post.php:7869](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7869-L7871) * function[delete_post_thumbnail()](https://developer.wordpress.org/reference/functions/delete_post_thumbnail/) * Removes the thumbnail (featured image) from the given post. * Used by [5 functions](https://developer.wordpress.org/reference/functions/delete_post_thumbnail/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/delete_post_thumbnail/#uses) | Source: [wp-includes/post.php:8135](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L8135-L8141) * function[wp_attachment_is_image()](https://developer.wordpress.org/reference/functions/wp_attachment_is_image/) * Determines whether an attachment is an image. * Used by [11 functions](https://developer.wordpress.org/reference/functions/wp_attachment_is_image/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/wp_attachment_is_image/#uses) | Source: [wp-includes/post.php:7169](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7169-L7171) * hook[get_lastpostdate](https://developer.wordpress.org/reference/hooks/get_lastpostdate/) * Filters the most recent time that a post on the site was published. * Used by [1 function](https://developer.wordpress.org/reference/hooks/get_lastpostdate/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/get_lastpostdate/#uses) | Source: [wp-includes/post.php:7557](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7557-L7557) * function[wp_mime_type_icon()](https://developer.wordpress.org/reference/functions/wp_mime_type_icon/) * Retrieves the icon for a MIME type or attachment. * Used by [5 functions](https://developer.wordpress.org/reference/functions/wp_mime_type_icon/#used-by) | Uses [9 functions](https://developer.wordpress.org/reference/functions/wp_mime_type_icon/#uses) | Source: [wp-includes/post.php:7183](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7183-L7324) * function[get_lastpostmodified()](https://developer.wordpress.org/reference/functions/get_lastpostmodified/) * Gets the most recent time that a post on the site was modified. * Used by [2 functions](https://developer.wordpress.org/reference/functions/get_lastpostmodified/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/get_lastpostmodified/#uses) | Source: [wp-includes/post.php:7576](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7576-L7615) * hook[icon_dir](https://developer.wordpress.org/reference/hooks/icon_dir/) * Filters the icon directory path. * Used by [3 functions](https://developer.wordpress.org/reference/hooks/icon_dir/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/icon_dir/#uses) | Source: [wp-includes/post.php:7228](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L7228-L7228) [Previous Page](https://developer.wordpress.org/reference/files/wp-includes/post.php/page/2/?output_format=md) [1](https://developer.wordpress.org/reference/files/wp-includes/post.php/?output_format=md) 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