Sometimes, in WooCommerce, the customer is required to fill in street name and house number in a single field.
In this case, we want to then validate the billing_address_1 WooCommerce checkout field to check if it contains numbers before processing the order. We have tried a number of methods to get this done but without any luck.
This standard WooCommerce method doesn't work:
add_action('woocommerce_checkout_process', 'custom_checkout_field_check');
function custom_checkout_field_check() {
// Check if set, if its not set add an error.
if ( $_POST['billing_address_1'] && strpbrk($_POST['billing_address_1'], '1234567890') )
wc_add_notice( __( 'Het adresveld moet minimaal een huisnummer bevatten' ), 'error' );
}
These return bool(false) on the checkout page:
var_dump($_POST['billing_address_1'] == true);
var_dump($_POST['billing_address_2'] == true);
var_dump($_POST['billing_postcode'] == true);
var_dump($_POST['billing_email'] == true);
This front-end workaround doesn't work.
document.querySelector("#place_order").addEventListener("click", validateAddressField);
function validateAddressField () {
console.log('Okay dan!');
}
What else can I try to ensure validation takes place before the order is processed?
// Check if address field contains house number otherwise provide error message
add_action( 'woocommerce_after_checkout_validation', 'validate_checkout', 10, 2);
function validate_checkout( $data, $errors ){
if ( ! preg_match('/[0-9]/', $data[ 'billing_address_1' ] ) ){
$errors->add( 'address', 'Sorry, but the address you provided does not contain a house number.' );
}
}
This isn't working correctly in your code: strpbrk($_POST['billing_address_1'], '1234567890').
he PHP function preg_match() is more appropriate here.
So I have make some little changes in your code to make it work as you expect:
add_action('woocommerce_checkout_process', 'address_field_validation', 10, 0);
function address_field_validation() {
// The field value to check
$post_value = $_POST['billing_address_1'];
// If there is no number in this field value, stops the checkout process
// and displays an error message.
if ( $post_value && ! preg_match( '/[0-9]+/', $post_value ) ) {
// The error message
throw new Exception( sprintf( __( 'Het adresveld moet minimaal een huisnummer bevatten', 'woocommerce' ) ) );
}
}
This code is tested and works on WooCommerce versions 2.6.x and 3.0+…
*This code goes in function.php file of your active child theme (or theme) or also in any plugin file.
Reference: WC_Checkout - process_checkout() source code