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<?php $dt = new DateTime('9999-99-99', new \DateTimeZone('UTC')); $serial = serialize($dt); var_dump( $serial );
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught DateMalformedStringException: Failed to parse time string (9999-99-99) at position 6 (9): Unexpected character in /in/O2Oo1:3 Stack trace: #0 /in/O2Oo1(3): DateTime->__construct('9999-99-99', Object(DateTimeZone)) #1 {main} thrown in /in/O2Oo1 on line 3
Process exited with code 255.
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught Exception: Failed to parse time string (9999-99-99) at position 6 (9): Unexpected character in /in/O2Oo1:3 Stack trace: #0 /in/O2Oo1(3): DateTime->__construct('9999-99-99', Object(DateTimeZone)) #1 {main} thrown in /in/O2Oo1 on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Fatal error: Uncaught Exception: DateTime::__construct(): Failed to parse time string (9999-99-99) at position 6 (9): Unexpected character in /in/O2Oo1:3 Stack trace: #0 /in/O2Oo1(3): DateTime->__construct('9999-99-99', Object(DateTimeZone)) #1 {main} thrown in /in/O2Oo1 on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (9999-99-99) at position 6 (9): Unexpected character' in /in/O2Oo1:3 Stack trace: #0 /in/O2Oo1(3): DateTime->__construct('9999-99-99', Object(DateTimeZone)) #1 {main} thrown in /in/O2Oo1 on line 3
Process exited with code 255.

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