closesession.php

См. документацию.

<?php
 
namespace Bitrix\Main\Engine\ActionFilter;
 
use Bitrix\Main\Event;

final class CloseSession extends Base
{
    private $enabled;

    public function __construct($enabled = true)
    {
        $this->enabled = $enabled;
 
        parent::__construct();
    }
 
    public function onBeforeAction(Event $event)
    {
        if (!$this->enabled)
        {
            return;
        }
 
        session_write_close();
    }
}