<?php

$time=1414929600;

$now=time();

$secs = $now - $time;

$now = date_create('now', new DateTimeZone('GMT'));
$here = clone $now;
$here->modify($secs.' seconds');

$diff = $now->diff($here);

$body = $diff->format('Wir sind %a Tage, %h Stunde, %i Minuten und %s Sekunden zusammen.');  
mail("fnetzband@googlemail.com", "Timestamp duration relationship", $body, "From: Liebling <max-moehring@web.de>\r\n");