PHP Readable Timestamps

example.php

<?
include "time.php";

$ugly = "2012-03-16 00:12:29";
$pretty = Time\readable($ugly);
echo $pretty;


?>

time.php

<?
// Maxwell Vandervelde
// MaxwellVandervelde.com
// Copyright 2012. Some Rights Reserved - Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
// http://creativecommons.org/licenses/by-sa/3.0/


namespace Time;
function getTimeDifference( $start, $end ){
    if($start == NULL){
        $start = strftime("%Y-%m-%d %H:%M:%S");
    }
    $uts['start']      =    strtotime( $start );
    $uts['end']        =    strtotime( $end );
    if( $uts['start']!==-1 && $uts['end']!==-1 ){
        if( $uts['end'] >= $uts['start'] )
        {
            $diff    =    $uts['end'] - $uts['start'];
            $days=intval((floor($diff/86400)));
            $hours=intval((floor($diff/3600)));
            $minutes=intval((floor($diff/60)));
            if($days)
                $diff = $diff % 86400;
            if($hours)
                $diff = $diff % 3600;
            if($minutes)
                $diff = $diff % 60;
            $diff    =    intval( $diff );
            return( array('days'=>$days, 'hours'=>($hours), 'minutes'=>$minutes, 'seconds'=>$diff) );
        } else {
            return -1;
        }
    } else {
        trigger_error( "Invalid date/time data detected", E_USER_WARNING );
    }
    return( false );
}
function readable($postTime){
        $diff = getTimeDifference($postTime,strftime("%Y-%m-%d %H:%M:%S"));
        if($diff['days'] == 0){
            if($diff['hours'] == 0){
                if($diff['minutes'] < 5){
                    return " just now ";
                } else if($diff['minutes'] == 1){
                    return(" a minute ago ");
                } else {
                    return(" ".$diff['minutes']." minutes ago");
                }
            } else if($diff['hours'] == 1){
                return(" an hour ago ");
            } else {
                if($diff['hours'] >= 4){
                    if(date("d",strtotime($postTime)) == date("d"))
                        return" Today at ".date("g:ia",strtotime($postTime));
                    else
                        return" Yesterday at ".date("g:ia",strtotime($postTime));
                }else
                    return(" ".$diff['hours']." hours ago");
            }
        }else if($diff['days'] > 365){
                return" on ".date("l, F jS, Y",strtotime($postTime));
        } else {
            if($diff['days'] == 1)
                return" Yesterday at ".date("g:ia",strtotime($postTime));
            else if($diff['days'] < 7)
                return" on ".date("l",strtotime($postTime))." at ".date("g:ia",strtotime($postTime));
            else
                return" on ".date("l, F jS",strtotime($postTime));
        }
 }

?>