public static function getInstance()
{
if (!self::$conn instanceof self) {
self::$conn = new self();
}
return self::$conn;
}
function is_answered($task_id) { $uid = (int) $_SESSION['uid']; $sql = "select * from moderators_history where task_id={$task_id} && to_usr!=from_usr order by id desc limit 0,1;"; $from_usr = Mysql::getInstance()->query($sql)->first('from_usr'); return $from_usr == $uid; }