Code-Snippets-Functions/Execute a function on a child site/WooCommerce/remove-billing-address-for-free-checkout.txt

function wc_remove_billing_address_fields_for_free_checkout( $fields ) { 

    $cart_total = floatval( WC()->cart->get_total( 'edit' ) );

    if( ! WC()->cart->needs_shipping() && 0.0 === $cart_total ) {

        /**
         * Fields to remove if Order total is 0.00
         *
         * @since 1.0.1
         * @param array   $fields    The billing fields we are removing
         * @return array
         */
        $fields_to_remove = (array) apply_filters( 'wc_billing_fields_to_remove_for_free_checkout', array( 
            'billing_address_1',
            'billing_address_2',
            'billing_city',
            'billing_state',
            'billing_postcode',
            'billing_country',
            'billing_phone',
        ) );

        foreach ( $fields_to_remove as $field ) {
            if( isset( $fields[$field] ) ) unset( $fields[$field] );
        }

    }

    return $fields;
}
add_filter( 'woocommerce_billing_fields', 'wc_remove_billing_address_fields_for_free_checkout' );