PHP Aufruf für zu Restricted access

<?php
/**
 *
 * Show the product details page
 *
 * @package    VirtueMart
 * @subpackage
 * @author Max Milbers, Valerie Isaksen
 * @todo handle child products
 * @link http://www.virtuemart.net
 * @copyright Copyright (c) 2004 - 2010 VirtueMart Team. All rights reserved.
 * @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
 * VirtueMart is free software. This version may have been modified pursuant
 * to the GNU General Public License, and as distributed it includes or
 * is derivative of works licensed under the GNU General Public License or
 * other free or open source software licenses.
 * @version $Id: default_addtonotice.php 7833 2014-04-09 15:04:59Z Milbo $
 */
// Check to ensure this file is included in Joomla!
defined('_JEXEC') or die('Restricted access');



$product = $viewData['product'];

$users = JFactory::getUser();
$usersid = $users->id;
$usersguest = $users->guest;
$produktid = $product->virtuemart_product_id;


$src2 = JURI::root() . 'templates/impulsashop/html/com_virtuemart/sublayouts/meine_php_datei.php';

echo ($src2);


?>



<script>
 
        
function myFunction() {
    var element = document.getElementById("mybtn");

    var element2 = document.getElementById("result_ausgabe");

    // Überprüfung, ob die Klasse "nocompare_btn" bereits vorhanden ist
    if (element.classList.contains("nocompare_btn")) {
        // Wenn ja, füge "compare_btn" hinzu und entferne "nocompare_btn"
        element.classList.remove("nocompare_btn");
        element.classList.add("compare_btn");


        fetch('<?php echo ($src2); ?>')
        .then(response => response.text())
        .then(data => {
            console.log(data);
            element2.innerText = data;

        })
        .catch(error => {console.error('Fehler beim Fetchen der Daten:', error)
          
     });

    } else {
        // Wenn nicht, entferne "compare_btn" und füge "nocompare_btn" hinzu
        element.classList.remove("compare_btn");
        element.classList.add("nocompare_btn");
    }
}


</script>


<div id="result_ausgabe"></div><br>


<a id="mybtn" onclick="myFunction()" class="compare_btn"><i class="fa fa-star"></i></a>