code: public static function format($number, $places, $monetary = FALSE) {
          $info = localeconv();
  
          if ($monetary) {
              $decimal = $info['mon_decimal_point'];
              $thousands = $info['mon_thousands_sep'];
          } else {
              $decimal = $info['decimal_point'];
              $thousands = $info['thousands_sep'];
          }
  
          return number_format($number, $places, $decimal, $thousands);
      }
docs: Locale-aware number and monetary formatting.
  
  // In English, "1,200.05"
  // In Spanish, "1200,05"
  // In Portuguese, "1 200,05"
  echo Num::format(1200.05, 2);
  
  // In English, "1,200.05"
  // In Spanish, "1.200,05"
  // In Portuguese, "1.200.05"
  echo Num::format(1200.05, 2, TRUE);
  
  @param   float $number number to format
  @param   integer $places decimal places
  @param   boolean $monetary monetary formatting?
  @return  string
  @since   3.0.2