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<?php $re = '/(\|{(\d+)})(?!.*\1)/'; $str = '{1|{1078} {*|{1079}-}test{1|{4829}, test2 {4457}}} {*|{1078} {*|{1079}-}test3{1|{4829}, test4 {23232}}} '; preg_match_all($re, $str, $matches); print_r($matches[2]);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 1078 [1] => 1079 [2] => 4829 )

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