WooCommerce –检查产品是否已经在购物车中

这是WooCommerce的代码段，当产品已经放入购物车时，它会更改“添加到购物车”按钮的文本。它使用两个过滤器，一个用于更改产品页面上的文本，另一个用于产品列表。结果如下：

/**
 * Change the add to cart text on single product pages
 */
add_filter('woocommerce_product_single_add_to_cart_text', 'woo_custom_cart_button_text');

function woo_custom_cart_button_text() {
	
	foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
		$_product = $values['data'];
	
		if( get_the_ID() == $_product->id ) {
			return __('Already in cart - Add Again?', 'woocommerce');
		}
	}
	
	return __('Add to cart', 'woocommerce');
}

/**
 * Change the add to cart text on product archives
 */
add_filter( 'woocommerce_product_add_to_cart_text', 'woo_archive_custom_cart_button_text' );

function woo_archive_custom_cart_button_text() {
	
	foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
		$_product = $values['data'];
	
		if( get_the_ID() == $_product->id ) {
			return __('Already in cart', 'woocommerce');
		}
	}
	
	return __('Add to cart', 'woocommerce');
}