Tempo retroativo por extenso pt-br

gistfile1.php

<?php

function dateFormat($date) {
    if (!$date) {
        return '';
    }

    $nowDay  = new DateTime('now');
    $pastDay = new DateTime($date);

    $interval = $nowDay->diff($pastDay);

    $mapExtended = array(
        'y' => array('ano', 'anos'),
        'm' => array('mês', 'meses'),
        'd' => array('dia', 'dias'),
        'h' => array('hora', 'horas'),
        'i' => array('minuto', 'minutos'),
        's' => array('segundo', 'segundos'),
    );

    $message = array();

    foreach ($mapExtended as $key => $map) {
        if ($interval->$key > 0 && count($message) < 2) {
            $message[] = $interval->$key . ' ' . $map[$interval->$key == 1 ? 0 : 1];
        }
    }

    return 'há ' . implode(' e ', $message);
}