<?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('2352-23532665');
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