marian-kadanka

<?php

add_action( 'woocommerce_after_checkout_validation', 'kadanka_checkout_validate_address', 10, 2 );
function kadanka_checkout_validate_address( $fields, $errors ) {

	$numbers = '0123456789';
	$addresses = array( 'billing_address_1', 'shipping_address_1' );
	foreach ( $addresses as $address ) {
		if ( ! empty( $fields[ $address ] ) ) {
			if ( strpbrk( $fields[ $address ], $numbers ) === false ) {