How to filter by properties of trade offers in bitrix catalog.section?

Question

1C-Bitrix

The smart filter has been slightly edited, so a separate file has been created for ajax requests and the component output catalog.sectionto which the variable name is passed $arrFilter.
The values ​​of this array are formed from the data from the GET, as follows:

foreach ($_GET as $key => $get) :
    if (is_array($get)) {
      foreach ($get as $value) {
        $arrFilter['PROPERTY_'.$key.'_VALUE'][] = $value;
      }
    }
  endforeach;

If you create a property for goods, for example, then everything works fine SIZEwith the key and the goods are filtered. $arrFilter['PROPERTY_'.$key.'_VALUE']I found in the documentation that filtering by trade offers is carried out in exactly the same way, that is, for example , PROPERTY_SIZEor is indicated PROPERTY_SIZE_VALUE, but it doesn’t work either way. How to filter by a trade offer property with the name SIZE? Is it a problem with name conflicts? SIZEnow both goods and TP have it, while it is filtered by goods but not by TP.

Answer 1

The answer was given on the Bitrix forum in this thread - https://dev.1c-bitrix.ru/support/forum/forum6/topi...
foreach ($_GET as $key => $get) :
if (is_array ($get)) {
foreach ($get as $value) {
}
}
endforeach;