在Woocommerce 3中自動將產品添加到購物車

Question

我希望任何訪問我的Woocommerce商店的人都能在他的購物車中找到免費的產品。 我找到了這段代碼，它可以正常工作， 但是它在日志中顯示了許多php錯誤 。

您是否知道為什么不干凈？

請對此提供任何幫助。

/*
 * AUTOMATICALLY ADD A PRODUCT TO CART ON VISIT
 */
function aaptc_add_product_to_cart() {
    if ( ! is_admin() ) {
        $product_id = 99999;  // Product Id of the free product which will get added to cart
        $found  = false;
        //check if product already in cart
        if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
            foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
                $_product = $values['data'];
                if ( $_product->get_id() == $product_id )
                    $found = true;
            }
            // if product not found, add it
            if ( ! $found )
                WC()->cart->add_to_cart( $product_id );
        } else {
            // if no products in cart, add it
            WC()->cart->add_to_cart( $product_id );
        }
    }
}
add_action( 'init', 'aaptc_add_product_to_cart' );

再次答復后進行編輯謝謝，您的代碼沒有更多錯誤，但是您可以檢查是否可以根據SKU“驚喜”選擇免費產品嗎？ 再次感謝大家。

    function sku2id( $sku = false ) {
    global $wpdb;
    if( !$sku )
        return null;
    $product_id = $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key='_sku' AND meta_value='%s' LIMIT 1", $sku ) );
    if ( $product_id )
        return $product_id;
    return null;
}
add_action( 'template_redirect', 'auto_add_product_to_cart' );
function auto_add_product_to_cart() {
    if ( is_admin() ) return;

    // Product Id of the free product which will get added to cart;
    $product_id = sku2id("Surprise");  // FREE PRODUCT MUST HAVE SKU Surprise

    if ( WC()->cart->is_empty() ) 
    {
        // No products in cart, we add it
        WC()->cart->add_to_cart( $product_id ); 
    } 
    else
    {
        $found  = false;

        //check if product already in cart
        foreach ( WC()->cart->get_cart() as $cart_item ) {
            if ( $cart_item['data']->get_id() == $product_id )
                $found = true;
        }

        // if the product is not in cart, we add it
        if ( ! $found )
            WC()->cart->add_to_cart( $product_id ); 
    }
}

Answer 1

嘗試使用template_redirect操作鈎子重新訪問類似的代碼：

add_action( 'template_redirect', 'auto_add_product_to_cart' );
function auto_add_product_to_cart() {
    if ( is_admin() ) return;

    // Product Id of the free product which will get added to cart;
    $product_id = 99999;

    if ( WC()->cart->is_empty() ) 
    {
        // No products in cart, we add it
        WC()->cart->add_to_cart( $product_id ); 
    } 
    else
    {
        $found  = false;

        //check if product already in cart
        foreach ( WC()->cart->get_cart() as $cart_item ) {
            if ( $cart_item['data']->get_id() == $product_id )
                $found = true;
        }

        // if the product is not in cart, we add it
        if ( ! $found )
            WC()->cart->add_to_cart( $product_id ); 
    }
}

代碼進入您的活動子主題（或活動主題）的function.php文件中。 經過測試和工作。

注意： init鈎在這里是不正確的，因此不能用於此…