CacheEngineApc::addToSet

public function addToSet($key, $value)
{
	$cacheKey = sha1($key . '|' . $value);
	if (array_key_exists($cacheKey, self::$listKeys))
	{
		return;
	}

	$iexKey = $key . '|iex|' . $cacheKey;
	$itemExist = apcu_fetch($iexKey);
	if ($itemExist == $cacheKey)
	{
		return;
	}

	$list = apcu_fetch($key);

	if (!is_array($list))
	{
		$list = [];
	}

	if (!array_key_exists($value, $list))
	{
		$list[$value] = 1;

		apcu_store($key, $list, 0);
		self::$listKeys[$cacheKey] = 1;
	}

	$this->set($iexKey, 2591000, $cacheKey);
}