Character only validation for first name and last name in WooCommerce

[sebastian-moran]

Character only validation for first name and last name in WooCommerce on child sites.

Snippet Type

Execute on Child Sites

Snippet

add_action( 'woocommerce_after_checkout_validation', 'bks_validate_fname_lname', 10, 2);

function bks_validate_fname_lname( $fields, $errors ){
    if (!preg_match( '/^[a-zA-Z ]+$/', $fields[ 'billing_first_name' ])){
        $errors->add( 'validation', 'First name should only have no special characters.' );
    }
    if (!preg_match( '/^[a-zA-Z ]+$/', $fields[ 'billing_last_name' ])){
        $errors->add( 'validation', 'Last name should only have no special characters.' );
    }
}