postdecodefilter.php

<?php
 
namespace Bitrix\Main\Web;
 
use Bitrix\Main\Application;
use Bitrix\Main\Text\Encoding;
use Bitrix\Main\Type;
 
class PostDecodeFilter implements Type\IRequestFilter
{
    public function filter(array $values)
    {
        if(Application::getInstance()->isUtfMode())
        {
            return null;
        }
        if(empty($values['post']) || !is_array($values['post']))
        {
            return null;
        }
 
        return array(
            'post' => Encoding::convertEncoding($values['post'], 'UTF-8', SITE_CHARSET),
        );
    }
}