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<?php $dt = new DateTime(null, new DateTimeZone('UTC')); var_dump(DateTime::ISO8601, $dt::ISO8601, constant(sprintf('%s::ISO8601', get_class($dt))));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /in/koLuF on line 3 string(13) "Y-m-d\TH:i:sO" string(13) "Y-m-d\TH:i:sO" string(13) "Y-m-d\TH:i:sO"
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.26, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
string(13) "Y-m-d\TH:i:sO" string(13) "Y-m-d\TH:i:sO" string(13) "Y-m-d\TH:i:sO"
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /in/koLuF on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /in/koLuF on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ',', expecting '(' in /in/koLuF on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected ',', expecting '(' in /in/koLuF on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'('' in /in/koLuF on line 5
Process exited with code 255.

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