DecimalMoneyFormatter.php

<?php
 
namespace Money\Formatter;
 
use Money\Currencies;
use Money\Money;
use Money\MoneyFormatter;
 
final class DecimalMoneyFormatter implements MoneyFormatter
{
    private $currencies;
 
    public function __construct(Currencies $currencies)
    {
        $this->currencies = $currencies;
    }
 
    public function format(Money $money)
    {
        $valueBase = $money->getAmount();
        $negative = false;
 
        if ($valueBase[0] === '-') {
            $negative = true;
            $valueBase = substr($valueBase, 1);
        }
 
        $subunit = $this->currencies->subunitFor($money->getCurrency());
        $valueLength = strlen($valueBase);
 
        if ($valueLength > $subunit) {
            $formatted = substr($valueBase, 0, $valueLength - $subunit);
            $decimalDigits = substr($valueBase, $valueLength - $subunit);
 
            if (strlen($decimalDigits) > 0) {
                $formatted .= '.'.$decimalDigits;
            }
        } else {
            $formatted = '0.'.str_pad('', $subunit - $valueLength, '0').$valueBase;
        }
 
        if ($negative === true) {
            $formatted = '-'.$formatted;
        }
 
        return $formatted;
    }
}