urlencode only the directory and file names of a URL

Question

I need to URL encode just the directory path and file name of a URL using PHP.

So I want to encode something like http://example.com/file name and have it r

Answer 1

I think this function ok:

function newUrlEncode ($url) {
    return str_replace(array('%3A', '%2F'), '/', urlencode($url));
}