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<?php const ISO8601U = "Y-m-d\TH:i:s.uO"; var_dump(DateTime::createFromFormat(\DateTime::ISO8601, '2015-08-31T00:55:00.000Z'));
Output for 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
bool(false)

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54.15 ms | 406 KiB | 5 Q