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<?php $str = 'back of 22 hours 30 minutes'; date_default_timezone_set('UTC'); var_dump(strtotime($str)); var_dump('22 ' . date('r', strtotime($str, time()))); var_dump('22 ' . date('r', strtotime($str, strtotime('2013-05-23 00:30')))); var_dump('22 ' . date('r', strtotime($str, strtotime('2013-05-22 23:30')))); var_dump('?? ' . date('r', strtotime($str, strtotime('2013-05-22 22:30')))); var_dump('21 ' . date('r', strtotime($str, strtotime('2013-05-22 21:00'))));

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