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<?php $string = 'Hello @1a1a-1a1a and @2B2B2-B2 too'; preg_match_all("/(?<=@)[\w-]+/", $string, $matches); print_r($matches[0]);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 1a1a-1a1a [1] => 2B2B2-B2 )

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