<?php

/* Time ago */

$timestamp = 1332686482; // a unix timestamp

$t = array('year'=>31556926,'month'=>2629744,'week'=>604800,'day'=>86400,'hour'=>3600,'minute'=>60,'second'=>1);

// Calculate how long ago the timestamp is
$diff      = time() - $timestamp;
foreach($t as $unit=>$seconds){
    if($seconds<=$diff){
    	$v=floor($diff/$seconds);
    	$nice_diff="$v $unit".($v==1?'':'s').' ago';
    	break;
    }
}

echo $nice_diff;

?>