Display time since...

<?php
//Snippet phx:calcTime
//Small PHx snippet to retrieve time since date.
//Not very exact but could work as a sample
//By Uncle68 - nov 2006

$diff = (time()+20) - $output;

$months = floor($diff/60/60/24/7/4);
$days = floor($diff/60/60/24);
$hours = floor($diff/60/60);
$minutes = floor($diff/60);

if ($days > 0) 
{
	$diff = $days . ' days';
} 
elseif ($hours > 0 && $hours < 60)
{
	$diff = $hours . ' hours';
}
else
{
	$diff = $minutes . ' minutes';
}

return $diff;
?>

<?php
$table = $modx->getFullTableName("site_content");
$results = $modx->db->select("createdon", $table, "", "createdon DESC", "1");
$results = $modx->db->getRow($results);
$createdon = $results['createdon'];
$now = time();
$diff = $now - $createdon;

$days = floor($diff/60/60/24);
$hours = floor($diff/60/60);
$minutes = floor($diff/60);

if ($days > 0) 
{
	$output = $days . ' days ';
    $diff = $diff - ($days * 86400);
	$hours = floor($diff/60/60);
    
} 

if ($hours > 0)
{
	$output .= $hours . ' hours';
    $diff = $diff - ($hours * 3600);
    $minutes = floor($diff/60);
}
if ($minutes >0)
{
	$output .= $minutes . ' minutes';
}

return $output;
?>