<?
include("shopdummys.php");

function checkAmount($inputAmount,&$errMsg)
{
	if (strlen($inputAmount) == 0)
	{
		$errMsg='please input the EUR amount';
		return false;
	}

	$hiLen=ereg("([0-9,]{1,14})",$inputAmount,$regs);
	if ($hiLen != strlen($inputAmount))
	{
		$errMsg='invalid input: '.$inputAmount;
		return false;
	}

	$hiPosKomma=strpos($inputAmount,',');
	if (($hiPosKomma == 0) && !($hiPosKomma === false))
	{
		$errMsg='first position must be a number';
		return false;
	}

	if ($hiPosKomma > 0)
	{
		if ($hiPosKomma + 3 < strlen($inputAmount))
		{
			$errMsg='maximum 2 digits for Cent';
			return false;
		}

		// only 1 ","
		$hiLen=ereg("([0-9]{1,14})\,([0-9]{1,2})",$inputAmount,$regs);
		if ($hiLen != strlen($inputAmount))
		{
			$errMsg='invalid input: '.$inputAmount;
			return false;
		}
	}
	return true;
}

$errMsg='';
if (isset($_POST['inputAmount']) && checkAmount($_POST['inputAmount'],$errMsg))
{
	include('showFinal.php');
}
else
{
	include('showInput.php');
}
?>