Disable Mix and Match contents switching for timer window prior to renewal

wc-sub-prevent-switching-before-renewal.php

/**
 * Disable contents switching for window prior to renewal
 *
 * @param  boolean          $can
 * @param  WC_Order_Item    $item
 * @param  WC_Subscription  $subscription
 * @return boolean
 */
public static function kia_prevent_modification_of_subscription( $can, $item, $subscription ) {

	if ( $can && wc_mnm_is_container_order_item( $item, $subscription ) ) {

		$no_switch_window_in_hours = 48;

		$hours_to_payment = ( $subscription->get_time( 'next_payment' ) - current_time( 'timestamp', true ) ) / ( 60 * 60 );

		if ( $hours_to_payment <= $no_switch_window_in_hours );
			$can = false;
		}

	}

	return $can;
}
add_filter( 'woocommerce_subscriptions_can_item_be_switched', 'kia_prevent_modification_of_subscription', 20, 3 );