wp-admin/includes/user.php:350Delete user and optionally reassign posts and links to another user.
$idint$reassignintoptionalnullbool3 hooks fire while wp_delete_user() runs, in this order:
Fires immediately before a user is deleted from the site.
Filters the list of post types to delete with a user.
Fires immediately after a user is deleted from the site.
function wp_delete_user( $id, $reassign = null ) { global $wpdb; if ( ! is_numeric( $id ) ) { return false; } $id = (int) $id; $user = new WP_User( $id ); if ( ! $user->exists() ) { return false; } // Normalize $reassign to null or a user ID. 'novalue' was an older default. if ( 'novalue' === $reassign ) { $reassign = null; } elseif ( null !== $reassign ) { $reassign = (int) $reassign; } /** * Fires immediately before a user is deleted from the site. * * Note that on a Multisite installation the user only gets removed from the site * and does not get deleted from the database. * * @since 2.0.0 * @since 5.5.0 Added the `$user` parameter. * * @param int $id ID of the user to delete. * @param int|null $reassign ID of the user to reassign posts and links to. * Default null, for no reassignment. * @param WP_User $user WP_User object of the user to delete. */ do_action( 'delete_user', $id, $reassign, $user ); if ( null === $reassign ) { $post_types_to_delete = array(); foreach ( get_post_types( array(), 'objects' ) as $post_type ) { if ( $post_type->delete_with_user ) { $post_types_to_delete[] = $post_type->name; } elseif ( null === $post_type->delete_with_user && post_type_supports( $post_type->name, 'author' ) ) { $post_types_to_delete[] = $post_type->name; } } /** * Filters the list of post types to delete with a user. * * @since 3.4.0 * * @param string[] $post_types_to_delete Array of post types to delete. * @param int $id User ID. */ $post_types_to_delete = apply_filters( 'post_types_to_delete_with_user', $post_types_to_delete, $id ); $post_types_to_delete = implode( "', '", $post_types_to_delete ); $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d AND post_type IN ('$post_types_to_delete')", $id ) ); if ( $post_ids ) { foreach ( $post_ids as $post_id ) { wp_delete_post( $post_id ); } } // Clean links. $link_ids = $wpdb->get_col( $wpdb->prepare( "SELECT link_id FROM $wpdb->links WHERE link_owner = %d", $id ) ); if ( $link_ids ) { foreach ( $link_ids as $link_id ) { wp_delete_link( $link_id ); } } } else { $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $id ) ); $wpdb->update( $wpdb->posts, array( 'post_author' => $reassign ), array( 'post_author' => $id ) ); if ( ! empty( $post_ids ) ) { foreach ( $post_ids as $post_id ) { clean_post_cache( $post_id ); } }Introduced in 2.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/user.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.