PhortuneUtil.php
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	<?php

	final class PhortuneUtil {

	public static function parseCurrency($string) {
	$string = trim($string);
	if (!preg_match('/^[-]?[$]?\d+([.]\d{0,2})?$/', $string)) {
	throw new Exception("Invalid currency format ('{$string}').");
	}

	$value = str_replace('$', '', $string);
	$value = (float)$value;
	$value = (int)round(100 * $value);

	return $value;
	}

	public static function formatCurrency($price_in_cents) {
	if (!preg_match('/^[-]?\d+$/', $price_in_cents)) {
	throw new Exception("Invalid price in cents ('{$price_in_cents}').");
	}

	$negative = ($price_in_cents < 0);
	$price_in_cents = abs($price_in_cents);
	$display_value = sprintf('$%.02f', $price_in_cents / 100);

	if ($negative) {
	$display_value = '-'.$display_value;
	}

	return $display_value;
	}

	}