Time interval function

gistfile1.php

public function timeAgo(\Datetime $then)
{
    $now = new \Datetime('now');

    $interval = $then->diff($now);

    $points = array(
        'y' => array('year', 'years'),
        'm' => array('month', 'months'),
        'd' => array('day', 'days'),
        'h' => array('hour', 'hours'),
        'i' => array('minute', 'minutes'),
    );

    foreach ($points as $key => $point) {
        if ($interval->$key >= 1) {
            $string = $interval->$key == 1 ? $point[0] : $point[1];

            return '<time datetime="'.$then->format('Y-m-d H:i:s').'" title="'.$then->format('Y-m-d H:i:s').'">'.$interval->$key.' '.$string.' ago'.'</time>';
        }
    }

    return 'just now';
}