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<?php $subject = "3 from last"; preg_match('~(?:(?P<index>[0-9]+)(st|nd|rd|th)*) from (?P<position>last|end|start|beginning)+~', $subject, $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> string(11) "3 from last" ["index"]=> string(1) "3" [1]=> string(1) "3" [2]=> string(0) "" ["position"]=> string(4) "last" [3]=> string(4) "last" }

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