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<?php $date = "4/23/15"; preg_match('~^' . implode('|', range(1, 12)) . '\/' . implode('|', range(1, 31)) . '\/[0-9]{2}$~', $date, $m); var_dump($m);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(1) "4" }

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