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<?php $d = new \DateTime('0001-01-15'); echo $d->format('Y-d-m H:i:s');
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
0001-15-01 00:00:00
Output for 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/AkaUt on line 3 0001-15-01 00:00:00
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/AkaUt on line 3 Fatal error: Class 'DateTime' not found in /in/AkaUt on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/AkaUt on line 3 Fatal error: Cannot instantiate non-existent class: datetime in /in/AkaUt on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/AkaUt on line 3 Fatal error: Cannot instantiate non-existent class: datetime in /in/AkaUt on line 3

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