PHP If Date Is >13 Days Ago

SELECT * FROM links WHERE (TO_DAYS(NOW()) - TO_DAYS(date))>13

$date = '2008-11-05';
if (strtotime("now") > strtotime("+13 days", strtotime($date))) {
  //Do something
}

$age=time() - strtotime($date);
if ($age > (13*86400))
{
     //do something
}

SELECT *, DATEDIFF(datecolumn,CURDATE()) AS days_diff FROM links