Direct where to dig to make a calculator?

Question

PHP

I have an excel file with 3 columns:
City 1, city 2 and the distance between them, tell me where you need to look to make a calculator on the site, upload it to a database or parser from an excel file, or make a json file and parse it using some kind of angular .

Answer 1

https://github.com/PHPOffice/PHPExcel

Answer 2

I think we need to take some kind of cardinates, then the school equation of Pythagoras, well, remember where Pythagoras has all his pants are equal and you can calculate the hypotenuse? then take some JavaScript and make a simple output function.
Sori could not resist, after all, you are not talking with the "brothers" in the front door, where you can "bastards! I came up with such a thing!".

Answer 3

XLS -> CSV -> MySQL (conversions are primitive and chewed on the Internet).
1 form + a couple of AJAX requests (auto-completion of the city when typing and a request for two inputs) + output of the result = the entire interface.
Angular is needed here like a saddle for a flea.