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<?php class MyDateTime extends \DateTime { public static function createFromFormat($format, $time, $timezone = null) { if (null === $timezone) { $timezone = new DateTimeZone(date_default_timezone_get()); } return new DateTime(parent::createFromFormat($format, $time, $timezone)); } } var_Dump(MyDateTime::createFromFormat('yy-mm-dd', '2017-01-17', new DateTimeZone('Europe/Berlin'))->format('c')); var_Dump(MyDateTime::createFromFormat('yy-mm-dd', '2017-01-17')->format('c'));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of MyDateTime::createFromFormat($format, $time, $timezone = null) should either be compatible with DateTime::createFromFormat(string $format, string $datetime, ?DateTimeZone $timezone = null): DateTime|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/v5kXX on line 4 string(25) "2020-06-23T13:46:56+02:00" string(25) "2020-06-23T13:46:56+02:00"

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