PHP numberformatter::parse truncates decimals - php

Question

I'm having a problem with my code where NumberFormatter::parse() is truncating decimals when there is a trailing zero. Our app uses Intl to be locale aware, so I am doing a JSON API call to check to make sure a number entered in a form is actually a number. For example when the locale calls for a comma as a decimal separator return FALSE for numbers entered with a period.
function parse_decimals($number)
{
// ignore empty strings and return
if(empty($number))
{
return $number;
}
$config = get_instance()->config;
$fmt = new \NumberFormatter( $config->item('number_locale'), \NumberFormatter::DECIMAL);
$fmt->format(1234567890.12300);
if (empty($config->item('thousands_separator')))
{
$fmt->setAttribute(\NumberFormatter::GROUPING_SEPARATOR_SYMBOL, '');
}
try
{
if(strcmp(strval($fmt->parse($number)),strval($number)) != 0)
{
$number = FALSE;
}
return $fmt->parse($number);
}
catch (Exception $e)
{
return FALSE;
}
}
The locale doesn't matter (because it's happeneing with all locales, so for the sake of argument Intl is used to set the locale to en_US.
Entered 50.00
Expected 50.00
Actual 50
Return Result FALSE
So you can see that parse is truncating 50.00 to 50. I have tried playing around with NumberFormatter::MAX_FRACTION_DIGITS, NumberFormatter::MIN_FRACTION_DIGITS and NumberFormatter::FRACTION_DIGITS without any effect. A side note is that if there is a better way to compare the expected number's format with the entered number's format than this, please feel free to suggest something better than this:
if(strcmp(strval($fmt->parse($number)),strval($number)) != 0)
{
$number = FALSE;
}