_wp_cron example

function wp_cron() {
    if ( did_action( 'wp_loaded' ) ) {
        return _wp_cron();
    }

    add_action( 'wp_loaded', '_wp_cron', 20 );
}

/** * Runs scheduled callbacks or spawns cron for all scheduled events. * * Warning: This function may return Boolean FALSE, but may also return a non-Boolean * value which evaluates to FALSE. For information about casting to booleans see the * {@link https://www.php.net/manual/en/language.types.boolean.php PHP documentation}. Use * the `===` operator for testing the return value of this function. * * @since 5.7.0 * @access private * * @return int|false On success an integer indicating number of events spawned (0 indicates no * events needed to be spawned), false if spawning fails for one or more events. */