$errors->add('validation',sprintf(__('%1$s is not valid. Please enter one of the following: %2$s','woocommerce'),'<strong>'.esc_html($field_label).'</strong>',implode(', ',$valid_states)));
}
}
}
if($required&&''===$data[$key]){
/* translators: %s: field name */
$errors->add('required-field',apply_filters('woocommerce_checkout_required_field_notice',sprintf(__('%s is a required field.','woocommerce'),'<strong>'.esc_html($field_label).'</strong>'),$field_label));