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<?php $s = "test"; preg_match("/(?P<differentword>(test))/", $s, $matches); var_dump(array_keys($matches));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> int(0) [1]=> string(13) "differentword" [2]=> int(1) [3]=> int(2) }

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