PayPal\Converter\FormatConverter::formatToPrice PHP Method

    public static function formatToPrice($value, $currency = null)
    {
        $decimals = 2;
        $currencyDecimals = array('JPY' => 0, 'TWD' => 0);
        if ($currency && array_key_exists($currency, $currencyDecimals)) {
            if (strpos($value, ".") !== false && floor($value) != $value) {
                //throw exception if it has decimal values for JPY and TWD which does not ends with .00
                throw new \InvalidArgumentException("value cannot have decimals for {$currency} currency");
            }
            $decimals = $currencyDecimals[$currency];
        } elseif (strpos($value, ".") === false) {
            // Check if value has decimal values. If not no need to assign 2 decimals with .00 at the end
            $decimals = 0;
        }
        return self::formatToNumber($value, $decimals);
    }

 /**
  * Total amount charged as part of this payment.
  *
  *
  * @param string|double $total
  *
  * @return $this
  */
 public function setTotal($total)
 {
     NumericValidator::validate($total, "Total");
     $total = FormatConverter::formatToPrice($total, $this->getCurrency());
     $this->total = $total;
     return $this;
 }