Add wishlist button to Virtuamart product list - php

Question

I'm using
1. Joomla 3.4.4
2. Virtuamart 3.0.9
and I want to use send data from products sublayout in Virtuamart and send data with ajax to a controller.
var url = "?";
jQuery(document).ready(function() {
jQuery( ".wishlist-btn" ).click(function() {
var productid = this.id;
var userid = jQuery('input#user_id').val();
var fav = {
Productid: productid,
Userid:userid
}
jQuery.ajax({
url: url,
type: "POST",
data: { json: JSON.stringify(fav) },
dataType: 'json',
contentType: 'application/json; charset=utf-8',
success: function(data) {
alert(data);
}
});
});
but I don't know where should write PHP code,and what is the URL in my AJAX request.
I want to send profile id and user id to add in database for wishlist.
I created a PHP file in
com_virtuamar/controller/ajax.php
$json = $_POST['json'];
$person = json_encode($json);
echo $person->Userid;
and for URL in my AJAX request I used
/components/com_virtuemart/controllers/ajax.php
but I think it's completely incorrect for address and usage in controller and also I don't know why userid doesn't return

Answer 1

You are an error in your Ajax request. For send to PHP file, remove data: { json: JSON.stringify(fav) } and replace by:
jQuery.ajax({
url: url,
type: "POST",
data: JSON.stringify(fav),
dataType: 'json',
contentType: 'application/json; charset=utf-8',
success: function(data) {
alert(data);
}
});
and on your php file replace:
$person = json_encode($json);
by
$person = json_decode($json);
If you want access directly on Joomla session for get ID or Password user, you can check for
JFactory::getUser();
please see more: https://docs.joomla.org/JFactory/getUser