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<?php $matches = array(); preg_match('/^(.*)-keyword-(\d+)-([\w]+)\..+$/', 'aa-bb-cc-keyword-12345-lastword.ext', $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> string(35) "aa-bb-cc-keyword-12345-lastword.ext" [1]=> string(8) "aa-bb-cc" [2]=> string(5) "12345" [3]=> string(8) "lastword" }

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