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<?php date_default_timezone_set ("UTC"); $date = DateTime::createFromFormat('U.u', microtime(true)); print_r($date); ?>
Output for 5.6.38, 7.0.0 - 7.0.5, 7.0.7 - 7.0.12, 7.0.14 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.2, 7.2.4 - 7.2.13, 7.3.0
DateTime Object ( [date] => 2017-07-06 09:42:13.000100 [timezone_type] => 1 [timezone] => +00:00 )
Output for 7.0.6, 7.0.13, 7.2.3
DateTime Object ( [date] => 2017-07-06 09:42:13.000200 [timezone_type] => 1 [timezone] => +00:00 )

preferences:
94.16 ms | 401 KiB | 81 Q