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<?php var_dump(preg_match_all('#/search/(?P<mac>(?:[[:xdigit:]]{2}([-:]))(?:[[:xdigit:]]{2}\2){4}[[:xdigit:]]{2})#', '/search/12-12-12-12-12-12', $matches)); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
int(1) array(4) { [0]=> array(1) { [0]=> string(25) "/search/12-12-12-12-12-12" } ["mac"]=> array(1) { [0]=> string(17) "12-12-12-12-12-12" } [1]=> array(1) { [0]=> string(17) "12-12-12-12-12-12" } [2]=> array(1) { [0]=> string(1) "-" } }

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