<?php
date_default_timezone_set('Europe/Lisbon'); // change to the desired timezone - http://p...content-available-to-author-only...p.net/manual/en/timezones.php
 
$startRaw = '2015-05-10 12-04-58';
$start = DateTime::createFromFormat('Y-m-d H-i-s', $startRaw );
 
$endRaw = date("Y-m-d H-i-s");
$end = DateTime::createFromFormat('Y-m-d H-i-s', $endRaw );
 
$diff = $start->diff($end);
 
echo 'Difference: ' . $diff->format('%H Hours, %d days') . "\n";

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