I want to post some data in my website in csv format. I want it to be as
easy as posible for users.

After doing this I tried to open the file again and I am having problems
with an error.

Excel is changing a number like this: 125E245 into scientific notation.
Numbers like 123A213 in the same column are maintained as text.

How can I save my file in csv so Excel knows that alll the column is text
and not only some values?