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<?php $expr = '#^v?(?P<major>[0-9]+)\.(?P<minor>[0-9]+)(?:\.(?P<release>[0-9]+))?$#'; $val = 'v12.0'; preg_match($expr, $val, $match); var_dump($match);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> string(5) "v12.0" ["major"]=> string(2) "12" [1]=> string(2) "12" ["minor"]=> string(1) "0" [2]=> string(1) "0" }

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