PHP - Relative date function (2 minutes ago, 3 days ago...)

function relativedate($secs) {
		$second = 1;
		$minute = 60;
		$hour = 60*60;
		$day = 60*60*24;
		$week = 60*60*24*7;
		$month = 60*60*24*7*30;
		$year = 60*60*24*7*30*365;
 
		if ($secs <= 0) { $output = "now";
		}elseif ($secs > $second && $secs < $minute) { $output = round($secs/$second)." second";
		}elseif ($secs >= $minute && $secs < $hour) { $output = round($secs/$minute)." minute";
		}elseif ($secs >= $hour && $secs < $day) { $output = round($secs/$hour)." hour";
		}elseif ($secs >= $day && $secs < $week) { $output = round($secs/$day)." day";
		}elseif ($secs >= $week && $secs < $month) { $output = round($secs/$week)." week";
		}elseif ($secs >= $month && $secs < $year) { $output = round($secs/$month)." month";
		}elseif ($secs >= $year && $secs < $year*10) { $output = round($secs/$year)." year";
		}else{ $output = " more than a decade ago"; }
 
		if ($output <> "now"){
			$output = (substr($output,0,2)<>"1 ") ? $output."s" : $output;
		}
		return $output;
	}
 
 
 
echo relativedate(60); // 1 minute