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<?php echo DateTime::ATOM, PHP_EOL; echo DateTimeImmutable::ATOM, PHP_EOL; echo DateTimeInterface::ATOM, PHP_EOL;
Output for 7.2.0 - 7.2.33, 7.3.16 - 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
Y-m-d\TH:i:sP Y-m-d\TH:i:sP Y-m-d\TH:i:sP
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Y-m-d\TH:i:sP Fatal error: Uncaught Error: Undefined class constant 'ATOM' in /in/hfP1k:4 Stack trace: #0 {main} thrown in /in/hfP1k on line 4
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Y-m-d\TH:i:sP Fatal error: Undefined class constant 'ATOM' in /in/hfP1k on line 4
Process exited with code 255.
Output for 5.4.2 - 5.4.45
Y-m-d\TH:i:sP Fatal error: Class 'DateTimeImmutable' not found in /in/hfP1k on line 4
Process exited with code 255.
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189.64 ms | 401 KiB | 226 Q