wp_delete_user

Source code

function wp_delete_user( $id, $reassign = 'novalue' ) {

	global $wpdb;



	$id = (int) $id;



	// allow for transaction statement

	do_action('delete_user', $id);



	if ( 'novalue' === $reassign || null === $reassign ) {

		$post_ids = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_author = %d", $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 {

		$reassign = (int) $reassign;

		$wpdb->update( $wpdb->posts, array('post_author' => $reassign), array('post_author' => $id) );

		$wpdb->update( $wpdb->links, array('link_owner' => $reassign), array('link_owner' => $id) );

	}



	clean_user_cache($id);



	// FINALLY, delete user

	if ( !is_multisite() ) {

		$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id = %d", $id) );

		$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->users WHERE ID = %d", $id) );

	} else {

		$level_key = $wpdb->get_blog_prefix() . 'capabilities'; // wpmu site admins don't have user_levels

		$wpdb->query("DELETE FROM $wpdb->usermeta WHERE user_id = $id AND meta_key = '{$level_key}'");

	}