CIMMessenger::getMentionUsers

static function getMentionUsers(string $message): array
{
	$forUsers = [];
	if (preg_match_all("/[USER=([0-9]+)( REPLACE)?](.*?)[/USER]/i", $message, $matches))
	{
		foreach ($matches[1] as $userId)
		{
			$forUsers[(int)$userId] = (int)$userId;
		}
	}

	return $forUsers;
}