Convert Dollars to Cents
http://stackoverflow.com/questions/21735650/php-converting-dollars-to-cents
http://www.convertunits.com/from/dollars/to/cents
<?php
$input = '$64.99'; // value is given via form submission
$dollars = str_replace('$', '', $input); // get rid of the dollar sign
$cents_as_float = $dollars * 100; // multiply by 100 (it becomes float)
$cents_as_string = (string) $cents_as_float; // convert float to string
$cents = (int) $cents_as_string; // convert string to integer
echo $cents;