add_action('woocommerce_checkout_process', 'custom_validation_process'); function custom_validation_process() { global $woocommerce; if(isset($_POST['billing_address_1']) and $_POST['billing_address_1'] != '') { if (!preg_match('/([0-9]+)/Uis', $_POST['billing_address_1'])) { if(function_exists('wc_add_notice')) wc_add_notice( __('Oops, vergeet niet je huisnummer in te vullen in het adresveld.'), 'error' ); else $woocommerce->add_error( __('Oops, vergeet niet je huisnummer in te vullen in het adresveld.') ); } } if(isset($_POST['ship_to_different_address'])) { if(isset($_POST['shipping_address_1']) and $_POST['shipping_address_1'] != '') { if (!preg_match('/([0-9]+)/Uis', $_POST['shipping_address_1'])) { if(function_exists('wc_add_notice')) wc_add_notice( __('Oops, vergeet niet je huisnummer in te vullen in het adresveld.'), 'error' ); else $woocommerce->add_error( __('Oops, vergeet niet je huisnummer in te vullen in het adresveld.') ); } } } }
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