How to activate maintenance page (WP Maintenance Mode) programmatically

One of the WP Maintenance Mode users asked the support team how can the maintenance page be activated/deactivated programmatically. In case you were wondering the same thing, this is the solution:

First, create a function and add it where needed.

/**
 * Trigger activation/deactivation of the maintenance mode
 * 
 * @param int $status
 * @return
 */
function wpmm_custom_trigger($status) {
	if (!in_array($status, array(0, 1))) {
		return;
	}

	if (!class_exists('WP_Maintenance_Mode')) {
		return;
	}

	// get settings
	$settings = WP_Maintenance_Mode::get_instance()->get_plugin_settings();
	
	// set status
	$settings['general']['status'] = $status;
	$settings['general']['status_date'] = date('Y-m-d H:i:s');
	
	// save settings
	update_option('wpmm_settings', $settings);
	
	// here you should have a clear cache mechanism if you have a cache plugin installed and activated...
        // starting point: https://github.com/Designmodocom/WP-Maintenance-Mode/blob/master/includes/classes/wp-maintenance-mode-admin.php#L414
}

Then use the function like this:

// enable the maintenance mode
wpmm_custom_trigger(1);

// disable the maintenance mode
wpmm_custom_trigger(0);