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<?php $pattern = '~\{(.*?)\}~'; $string = '{3}+{2}-{1}'; preg_match_all($pattern, $string, $matches); print_r($matches[1]); // 1234
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 3 [1] => 2 [2] => 1 )

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