Code-Snippets-Functions/Execute a function on a child site/WooCommerce/conditionally-hiding-the-place-order-button.txt

add_filter( 'woocommerce_order_button_html', 'remove_place_order_button' );
function remove_place_order_button( $button_html ) {
    if ( ! WC()->cart->needs_shipping() || ! WC()->cart->needs_payment() ) {
        $button_html = '';
    }
    return $button_html;
}