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<?php $data = <<<DATA this will = ({match1}) this should = not ({match2}) ({match3}) DATA; $pattern = "~[^\w\s]\h*\K\({\w+}\)~"; preg_match_all($pattern, $data, $matches); print_r($matches[0]);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => ({match1}) )

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