Format Number

ReformatPhoneNumber.php

<?php
function ReformatPhoneNumber($number){        
    $match2 = preg_match('/^\d(?:[-\s]?\d){6,11}$/', $number);
     if(  $match2   ){      
        echo preg_replace( '/[^0-9]/', '', $number );
      }else{
           throw new Exception("Invalid phone number");
     }
}
echo ReformatPhoneNumber('012-345 69');
echo ReformatPhoneNumber('012345');
echo ReformatPhoneNumber('-012345 678');
echo ReformatPhoneNumber('01203- 34566');
echo ReformatPhoneNumber('123456678875432');
echo ReformatPhoneNumber('123 4567');