Can a base64 encoded string contain whitespace?

Question

Might a base64 encoded string contain whitespace? Specifically, could it contain whitespace at the end of the string?

PS. I\'m thinking about the whole \"My

Answer 1

Wikipedia suggests that there're like a gazillion variations of the Base64 encoding:

http://en.wikipedia.org/wiki/Base64

So the answer probably depends on what you need to do with the string. But I'd dare say you created in PHP with base64_encode() so it appears to be safe to append blanks: