Future Value Calculator
A) Enhance the php file so it tests the interest rate entry to make sure it is also less than or equal to 15. To do that, use an OR operator. If the rate isn't valid, display an error message reading "rate must be greater than zero and less than or equal to 15."
B) Modify the php file so it tests the years entry to make sure it is a valid number that's greater than zero and less than or equal to 50. if it isn't, display an error message like the first one.
C) modify the php file so it uses embedded PHP to display the current date at the bottom of the web page like this: "this calculation was done on 01/14/2018."
PHP file:
Index file:
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