add_filter('add_to_cart_redirect', 'cw_redirect_add_to_cart');
function cw_redirect_add_to_cart() {
    global $woocommerce;
    $cw_redirect_url_checkout = $woocommerce->cart->get_checkout_url();
    return $cw_redirect_url_checkout;
}

add_filter( 'woocommerce_product_single_add_to_cart_text', 'cw_btntext_cart' );
add_filter( 'woocommerce_product_add_to_cart_text', 'cw_btntext_cart' );
function cw_btntext_cart() {
    return __( 'أشتري الأن', 'woocommerce' );
}