What does this mean?

[beaver6813]

I'm going through some Google Developer Docs and it mentions this:

After performing these steps, percent-escape all characters in the URL which are < ASCII 32, >= 127, "#", or "%". The escapes should use uppercase hex characters.

Usually PHP urlencode/rawurlencode will encode all non alpha-numeric. Does this mean that it wants some others to be kept non-encoded as well such as ! (ASCII 33) and $ (ASCII 36) ?

 

[pixelbypixel]

I'd assume so, since # and % are used in such things a %20 for space, there is no need to encode the % the same for any # on the end of a url for an anchor location.