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<?php preg_match('/^blog\/(?P<year>[0-9]+){4}$/', 'blog/12345', $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(10) "blog/12345" ["year"]=> string(1) "5" [1]=> string(1) "5" }

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