humanizeDateDifference

public function humanizeDateDifference($now,$otherDate=null,$offset=null)
{
	if($otherDate != null){
		$offset = $now - $otherDate;
	}
	if ($offset == 0)
	{
		$otherDate =$otherDate + 1;
		$offset = $now - $otherDate;
	}
	
	if($offset != null){
		$deltaS = $offset%60;
		$offset /= 60;
		$deltaM = $offset%60;
		$offset /= 60;
		$deltaH = $offset%24;
		$offset /= 24;
		$deltaD = ($offset > 1)?ceil($offset):$offset;
	} else{
		throw new Exception("Must supply otherdate or offset (from now)");
	}
	if($deltaD > 1){
		if($deltaD > 365){
			$years = ceil($deltaD/365);
			if($years ==1){
				return "last year";
			} else{
				return "<br>$years years ago";
			}
		}
		if($deltaD > 6){
			//return date('dS F Y',strtotime("$deltaD days ago"));
		}
		return "$deltaD days ago";
	}
	if($deltaD == 1){
		return "Yesterday";
	}
	if($deltaH == 1){
		return "last hour";
	}
	if($deltaM == 1){
		return "1 minute ago";
	}
	if($deltaH > 0){
		return $deltaH." hours ago";
	}
	if($deltaM > 0){
		return $deltaM." minutes ago";
	}
	else{
		return "a few seconds ago";
	}
}