Humanize date differences in PHP (like facebook - Eg: 2 days ago, 14 hours ago, few seconds ago).

datedifference.php

#!/usr/bin/env php
# This function prints the difference between two php datetime objects
# in a more human readable form
# inputs should be like strtotime($date)
# Adapted from https://gist.github.com/207624 python version

function humanizeDateDiffference($now,$otherDate=null,$offset=null){
	if($otherDate != null){
		$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($deltaD > 6){
			return date('d-M',strtotime("$deltaD days ago"));
		}		
		return "$deltaD days ago";
	}
	if($deltaD == 1){
		return "Yesterday";
	}
	if($deltaH == 1){
		return "last hour";
	}
	if($deltaM == 1){
		return "last minute";
	}
	if($deltaH > 0){
		return $deltaH." hours ago";
	}
	if($deltaM > 0){
		return $deltaM." minutes ago";
	}
	else{
		return "few seconds ago";
	}
}

I also changed line 18 to use floor:

$deltaD = ($offset > 1)?floor($offset):$offset;

Let's say that something happend yesterday at 1 and your current time is 2. Would you call one hour and a day two days ago or one day ago? One day ago made more sense in my app.

Cheers.