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<?php $string = 'string1+String-2'; preg_match_all("/([a-zA-Z0-9-_])+\+([a-zA-Z0-9\-_])+/", $string, $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> array(1) { [0]=> string(16) "string1+String-2" } [1]=> array(1) { [0]=> string(1) "1" } [2]=> array(1) { [0]=> string(1) "2" } }

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