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<?php $string = "Союз Советских Социалистических Республик"; $expr = '/(?<=\s|^)\w/iu'; preg_match_all($expr, $string, $matches); $result = implode('', $matches[0]); echo $result = strtoupper($result);
Output for git.master_jit, git.master, rfc.property-hooks
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