Question

I want to know what will be the best way for a char-char conversion.

I will create some data for the conversion for example teh letter “A” will be converted to “C” and so on.

Shall I use a MySQL DB or files or what?

Note: The application will be a web app and most likely be running ASP or PHP.

EDIT:

I want to create a website or a desktop app that will allow user who work on PCs that only support one language to be able to use any other language something like a translator, yet it is not a translator.

For example, arabic users cannot use the AR keyboard due to system restrictions, I want to help them write in the language without installing the language pack. I`m facing this problem myself, and can`t install language pack without admin access.

I can`t provide output at the moment as the PC I`m using doesn`t support AR.

Answer 1

I guess you mean character / keyboard mapping (or an Input Method Editor as Ignacio Vazquez-Abrams said)…

In this case, create static hash maps / associative arrays that map keys to characters or strings.
That said, however, I think there are some keyboard mapping tools out there that hook into the operating system and can be customized to one’s needs.