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<?php $string = 'a@-b.cd'; $pattern = '/[a-z0-9_\-\+\.]+@[a-z0-9\-]+\.([a-z]{2,4})(?:\.[a-z]{2})?/i'; preg_match_all($pattern, $string , $matches); var_dump($matches[0]);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(7) "a@-b.cd" }

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