--TEST-- Comparing datetime objects should account for microseconds --FILE-- <?php date_default_timezone_set('UTC'); $date1 = DateTime::createFromFormat('U.u', '1448889063.3531'); $date2 = DateTime::createFromFormat('U.u', '1448889063.5216'); $date3 = DateTime::createFromFormat('U.u', '1448889063.5216'); var_dump($date1 == $date2); var_dump($date1 < $date2); var_dump($date2 > $date1); var_dump($date2 == $date3); --EXPECT-- bool(false) bool(true) bool(true) bool(true)