delete_post_meta() WordPress Function

function delete_post_meta( $post_id, $meta_key, $meta_value = '' ) {
	// Make sure meta is deleted from the post, not from a revision.
	$the_post = wp_is_post_revision( $post_id );
	if ( $the_post ) {
		$post_id = $the_post;
	}

	return delete_metadata( 'post', $post_id, $meta_key, $meta_value );
}
Uses	Description
wp-includes/revision.php:wp_is_post_revision()	Determines if the specified post is a revision.
wp-includes/meta.php:delete_metadata()	Deletes metadata for the specified object.
Used By	Description
wp-includes/comment.php:do_all_trackbacks()	Performs all trackbacks.
wp-includes/comment.php:do_all_enclosures()	Performs all enclosures.
wp-includes/comment.php:do_all_pingbacks()	Performs all pingbacks.
wp-includes/post.php:wp_check_for_changed_dates()	Check for changed dates for published post objects and save the old date.
wp-admin/includes/class-wp-privacy-policy-content.php:WP_Privacy_Policy_Content::get_suggested_policy_text()	Check for updated, added or removed privacy policy information from plugins.
wp-admin/includes/class-wp-privacy-policy-content.php:WP_Privacy_Policy_Content::_policy_page_updated()	Update the cached policy info when the policy page is updated.
wp-admin/includes/privacy-tools.php:wp_privacy_process_personal_data_export_page()	Intercept personal data exporter page Ajax responses in order to assemble the personal data export file.
wp-admin/includes/privacy-tools.php:wp_privacy_generate_personal_data_export_file()	Generate the personal data export file.
wp-includes/class-wp-customize-manager.php:WP_Customize_Manager::handle_dismiss_autosave_or_lock_request()	Deletes a given auto-draft changeset or the autosave revision for a given changeset or delete changeset lock.
wp-includes/nav-menu.php:_wp_delete_customize_changeset_dependent_auto_drafts()	Deletes auto-draft posts associated with the supplied changeset.
wp-includes/class-wp-customize-nav-menus.php:WP_Customize_Nav_Menus::save_nav_menus_created_posts()	Publishes the auto-draft posts that were created for nav menu items.
wp-admin/includes/class-custom-image-header.php:Custom_Image_Header::ajax_header_remove()	Given an attachment ID for a header image, unsets it as a user-uploaded header image for the active theme.
wp-includes/functions.php:wp_scheduled_delete()	Permanently delete comments or posts of any type that have held a status of ‘trash’ for the number of days defined in EMPTY_TRASH_DAYS.
wp-includes/class-wp-embed.php:WP_Embed::delete_oembed_caches()	Deletes all oEmbed caches. Unused by core as of 4.0.0.
wp-includes/post.php:set_post_thumbnail()	Sets the post thumbnail (featured image) for the given post.
wp-includes/post.php:delete_post_thumbnail()	Removes the thumbnail (featured image) from the given post.
wp-includes/post.php:wp_check_for_changed_slugs()	Check for changed slugs for published post objects and save the old slug.
wp-includes/post.php:wp_delete_attachment()	Trash or delete an attachment.
wp-includes/post.php:wp_update_attachment_metadata()	Updates metadata for an attachment.
wp-includes/post.php:wp_untrash_post_comments()	Restore comments for a post from the Trash.
wp-includes/post.php:wp_insert_post()	Insert or update a post.
wp-includes/post.php:wp_delete_post()	Trash or delete a post or page.
wp-includes/post.php:wp_untrash_post()	Restores a post from the Trash.
wp-includes/post.php:update_attached_file()	Update attachment file path based on attachment ID.
wp-includes/nav-menu.php:wp_update_nav_menu_item()	Saves the properties of a menu item or create a new one.