Replace "Add to Cart" button on WooCommerce single product page if cart is not empty

Question

I have the following PHP code in my Code Snippets App (plugin):

add_action( 'woocommerce_product_meta_end', 'message_when_other_product_already_in_cart', 10 );
function message_when_other_product_already_in_cart() {
    if (WC()->cart->get_cart_contents_count() > 0) {
    $message = 'Please complete your purchase or clear your cart before you add another product to your cart. ';
       echo '<b><p><p>'.$message.'</b></p>';
}
}

What I need is a way to hide the "Add to Cart" button. Not sure what can be used in PHP code to hide the button. In a previous question I asked, someone suggested I use:

if ( WC()->cart->get_cart_contents_count() > 0) {
        $is_purchasable = false;
}
    return $is_purchasable;

But since our requirements have changed, I just want to hide the button and display the message "Before you can add...". I don't want to use $is_purchasable = false; is this possible?

I tried various methods, including embedding CSS in the PHP code. However, all efforts failed to simply hide the "Add to Cart" button.

Answer 1

The following will, on a single product page, replace the "Add to Cart" button with a custom text message if the cart is not empty:

// 添加到购物车替换文本消息
function add_to_cart_replacement(){
    // 您的消息文本
    $message_text = __( "在您可以将另一个产品添加到购物车之前，请完成购买或清空购物车。", "woocommerce" );
    
    // 显示文本消息
    echo '<p class="button message">' . $message_text . '</p>';
}
// 用自定义文本消息替换单个产品的添加到购物车按钮
add_action( 'woocommerce_single_product_summary', 'replace_single_add_to_cart_button', 1 );
function replace_single_add_to_cart_button() {
    global $product;
    
    // 如果购物车不为空
    if( ! WC()->cart->is_empty() ){
        // 对于变量产品类型（保留属性选择字段）
        if( $product->is_type( 'variable' ) ) {
            remove_action( 'woocommerce_single_variation', 'woocommerce_single_variation_add_to_cart_button', 20 );
            add_action( 'woocommerce_single_variation', 'add_to_cart_replacement', 20 );
        }
        // 对于其他所有产品类型
        else {
            remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 30 );
            add_action( 'woocommerce_single_product_summary', 'add_to_cart_replacement', 30 );
        }
    }
}

The code is placed in your child theme’s functions.php file (or in a plugin). Tested and available.

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