I have added custom code in m3\vendor\magento\module-wishlist\CustomerData\Wishlist.php, and called inside the app\design\frontend\zero\my_theme\Magento_Wishlist\templates\sidebar.phtml, for testing i am directly edited in core files, how to properly Override by using custom module?

1 Answer 1


This is going to be the best option for you.


<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Wishlist\CustomerData\Wishlist">
        <plugin disabled="false" name="Vendor_Wishlist_Plugin_Magento_Wishlist_CustomerData_Wishlist" sortOrder="10" type="Vendor\Wishlist\Plugin\Magento\Wishlist\CustomerData\Wishlist"/>


 * Copyright ©  All rights reserved.
 * See COPYING.txt for license details.

namespace Vendor\Wishlist\Plugin\Magento\Wishlist\CustomerData;

class Wishlist

    protected $wishlistHelper;

    public function __construct(
        \Magento\Wishlist\Helper\Data $wishlistHelper
        $this->wishlistHelper = $wishlistHelper;

    public function afterGetSectionData(
        \Magento\Wishlist\CustomerData\Wishlist $subject,
    ) {

        // Your code here

        return $result;
  • I am getting an error when i try to add the function: snipboard.io/XOK5Av.jpg inside the module.
    – zus
    Commented Apr 9, 2021 at 14:50
  • I am trying to add the wholee function what i edit inside the C:\xampp\htdocs\m3\vendor\magento\module-wishlist\CustomerData\Wishlist.php
    – zus
    Commented Apr 9, 2021 at 14:54
  • Well you don't add it inside a function you would add it after the afterGetSectionData function Commented Apr 9, 2021 at 14:54
  • Also you cannot overwrite a protected function you would need to do you modifications in the afterGetSectionData function Commented Apr 9, 2021 at 14:56
  • I am getting confused, 1) should i add the function which i edit in the core wishlist.php after the afterGetSectionData right? ( code : codeshare.io/anxjMV )
    – zus
    Commented Apr 9, 2021 at 15:08

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