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<?php function ReformatPhoneNumber($n){ if(!preg_match('/\\d+\\-\\d+\\s\\d+/',$n))throw new Exception('Invalid phone number'); $n=str_replace(array('-',' '), '', $n); if(!in_array(strlen($n), array(7,12)))throw new Exception('Invalid phone number'); return $n; } echo ReformatPhoneNumber('-2352235 325');

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