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<?php $subject = "3rd from last"; preg_match('~(?P<index>([0-9]+)(?:rd|st)) from (?P<position>(last|end|start|beginning)+)~', $subject, $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(7) { [0]=> string(13) "3rd from last" ["index"]=> string(3) "3rd" [1]=> string(3) "3rd" [2]=> string(1) "3" ["position"]=> string(4) "last" [3]=> string(4) "last" [4]=> string(4) "last" }

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