Php 为WooCommerce中存储一些数据的购物车项目添加复选框

您可以使用WooCommerce会话变量，因为Cart和Checkout已经在使用它们.

每次选中复选框时，购物车项目密钥和产品ID pairs将存储在会话变量(数组)中.如果未选中该复选框，则相关数据将从数组中删除(删除购物车项目时也是如此).当下订单时，会话变量将被删除.

改为使用cart.php个模板中的第一个:

<td class="item-checkbox">
    <?php $cart_item_cbs = (array) WC()->session->get('cart_items_cbs'); // Get session variable
    printf('<input type="checkbox" name="item_cb" value="1" data-id="%s" data-key="%s"%s />',
        $_product->get_id(), $cart_item_key, isset($cart_item_cbs[$cart_item_key]) ? ' checked' : ''); 
    ?>
</td>

然后，您将在您的子主题的函数.php文件中添加以下内容:

// Javascript code for cart page only
add_action( 'woocommerce_after_cart', 'cart_item_checkbox_js' );
function cart_item_checkbox_js() {
    ?>
    <script>
    jQuery(function($) {
        if (typeof wc_cart_params === 'undefined')
            return false;
    
        const cartForm   = '.woocommerce-cart-form',
              blockWhite = {message: null, overlayCSS: {background: '#fff', opacity: 0.6}};
    
        $(cartForm).on('change', 'input[name=item_cb]', function(){
            const checked = $(this).prop('checked') ? 'yes' : 'no';
    
            $(cartForm).block(blockWhite);
    
            $.ajax({
                type: 'POST',
                url: wc_cart_params.ajax_url,
                data: {
                    'action'    : 'cart_item_cb',
                    'product_id': $(this).data('id'),
                    'item_key'  : $(this).data('key'),
                    'checked'   : checked
                },
                success: function (response) {
                    $(cartForm).unblock();
                    console.log(response);
                },
                error: function (error) {
                    console.log(error);
                }
            });
        })
    }); 
    </script>
    <?php
}

// The PHP AJAX Receiver
add_action( 'wp_ajax_cart_item_cb', 'get_cart_item_cb_values' );
add_action('wp_ajax_nopriv_cart_item_cb', 'get_cart_item_cb_values');
function get_cart_item_cb_values() {
    if ( isset($_POST['product_id']) && isset($_POST['item_key']) && isset($_POST['checked']) ) {
        // Get session variable
        $cart_item_cbs = (array) WC()->session->get('cart_items_cbs');
        $product_id    = intval($_POST['product_id']);
        $item_key      = esc_attr($_POST['item_key']);

        if ( $_POST['checked'] == 'yes' ) {
            $cart_item_cbs[$item_key] = $product_id; // Add to the array
            $message = 'Product ID:' . $product_id . 'added to the array.';
        } else {
            if ( isset($cart_item_cbs[$item_key]) ) {
                unset($cart_item_cbs[$item_key]); // Remove from the array
                $message = 'Product ID:' . $product_id . 'removed from the array.';
            }
        }

        if ( isset($message) ) {
            WC()->session->set('cart_items_cbs', $cart_item_cbs); // save data
            wp_die($message);
        }
    }
    wp_die('Something went wrong.');
}

// When an item is removed from cart, remove it also from our session variable array
add_action( 'woocommerce_cart_item_removed', 'action_remove_cart_item' );
function action_remove_cart_item( $cart_item_key ) {
    // Get session variable
    $cart_item_cbs = (array) WC()->session->get('cart_items_cbs');

    if ( isset($cart_item_cbs[$cart_item_key]) ) {
        unset($cart_item_cbs[$cart_item_key]); // Remove from the array
        WC()->session->set('cart_items_cbs', $cart_item_cbs); // Save data
    }
}

// When order has been created remove the session variable
add_action( 'woocommerce_checkout_order_created', 'remove_custom_session_variable' );
function remove_custom_session_variable( $order) {
    if( WC()->session->__isset('cart_items_cbs') ) {
        WC()->session->__unset('cart_items_cbs');
    }
}

要在PHP中获取存储的数据数组，您将使用:

$cart_item_cbs = (array) WC()->session->get('cart_items_cbs');

经过测试，效果良好.

如果您希望在下单后使用此数据，则必须将其另存为订单中的自定义元数据.