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<?php $re = '/\|{\K\d+(?=})/m'; $str = '{1|{1078} {*|{1079}-}test{1|{4829}, test2 {4457}}} {*|{1078} {*|{1079}-}test3{1|{4829}, test4 {23232}}} '; preg_match_all($re, $str, $matches); rsort($matches[0]); echo implode(',', array_unique($matches[0]));
Output for git.master, git.master_jit, rfc.property-hooks
4829,1079,1078

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