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<?php $str = '00:18:71:EC:38:58/072b8d45-895d-4d9d-9adb-e1502d6821d9.xml'; preg_match('/^(([0-9A-F]{2}[:-]){5}[0-9A-F]{2})+[\/]+([0-9a-z-]+[.]+[a-z]{3})$/', $str, $match); var_dump($match);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> string(58) "00:18:71:EC:38:58/072b8d45-895d-4d9d-9adb-e1502d6821d9.xml" [1]=> string(17) "00:18:71:EC:38:58" [2]=> string(3) "38:" [3]=> string(40) "072b8d45-895d-4d9d-9adb-e1502d6821d9.xml" }

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