Make Billing Fields Compulsory Print

To make WooCommerce Billing fields compulsory, the following code can be added to functions.php. Please note unless you are experienced with php, you shoul dproceed with caution as an incorrect installation can render your website inoperable.

add_filter('woocommerce_billing_fields', 'wtd_custom_billing_fields', 1000, 1);
function wtd_custom_billing_fields( $fields ) {
    $fields['billing_email']['required'] = true;
    $fields['billing_phone']['required'] = true;

    return $fields;
}