Add product to cart and setting up custom price | woocommerce

lol.php

global $woocommerce;
$woocommerce->cart->empty_cart(); //чистим
$custom_price = $price;  //$price - переменная с ценой 
$product_id = 11963;   //id любого товара
$quantity = 1;      //кол-во
$cart_item_data = array('custom_price' => $custom_price);   
$woocommerce->cart->add_to_cart( $product_id, $quantity, $variation_id, $variation, $cart_item_data );
$woocommerce->cart->calculate_totals();
$woocommerce->cart->set_session();
$woocommerce->cart->maybe_set_cart_cookies();

----------Bottom code insert to functions.php----------

add_filter( 'woocommerce_cart_ready_to_calc_shipping', 'delshipping_calc_in_cart', 1000 );
function woocommerce_custom_price_to_cart_item( $cart_object ) {  
    if( !WC()->session->__isset( "reload_checkout" )) {
        foreach ( $cart_object->cart_contents as $key => $value ) {
            if( isset( $value["custom_price"] ) ) {
                //for woocommerce version lower than 3
                //$value['data']->price = $value["custom_price"];
                //for woocommerce version +3
                $value['data']->set_price($value["custom_price"]);
            }
        }  
    }  
}
add_action( 'woocommerce_before_calculate_totals', 'woocommerce_custom_price_to_cart_item', 1000 );