function(string $dir = NULL)
{
if (($dir = $this->selectFolder($dir))
&& ($imap = imap_check($this->stream))
) {
if ($imap->Nmsgs > 0) {
$this->folders[$dir]['last_uid'] = $this->getMsgUid($imap->Nmsgs);
$this->folders[$dir]['num_msg'] = $imap->Nmsgs;
$this->folders[$dir]['last_check'] = microtime(true);
}
else {
$this->folders[$dir]['last_uid'] = 0;
$this->folders[$dir]['num_msg'] = 0;
$this->folders[$dir]['last_check'] = microtime(true);
}
return $imap;
}
return false;
}
