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<?php $formatter = new \MessageFormatter('en_US', '{0, date, YYYY-ww}'); var_dump($formatter->format([new \DateTimeImmutable])); $formatter = new \MessageFormatter('en_US', '{0}'); var_dump($formatter->format(['test']));
Output for rfc.property-hooks, git.master, git.master_jit
string(8) " 2021-51" string(4) "test"

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