URL as URL's get parameters - problem with “&”

Question

There is script that receives another url as GET parameter:

script.php?file=http://www.google.com&id=123

The problem is:
when url has p

Answer 1

Try to encode every special character like this:

script.php?file=http%3a%2f%2fwww.google.com%3fq%3dadsf%26lang%3den&id=123

although it might be better and easier to use rawurlencode().

Also, read this about URL encoding.