<?php
$format = 'd.m.Y H:i:s D l S z F M n y H u e T';
$value = '13.08.2015 17:08:23 Thu Thursday th 224 August Aug 8 15 17 432563 UTC UTC';
$dateTime = \DateTime::createFromFormat($format, $value);
echo $dateTime->getTimestamp() . "\n";
echo $dateTime->format($format);