WordPress at a glance
function is not described

upgrade_500() WP 5.0.0

Deprecated in 5.1.0. It is no longer supported and can be removed in future releases. It is recommended to replace this function with the same one.

Executes changes made in WordPress 5.0.0.

No Hooks.

Return

Nothing (null).

Usage

upgrade_500();

Code of upgrade 500: wp-admin/includes/upgrade.php WP 5.2.2

<?php
function upgrade_500() {
}