This method is the counterpart to resolve():

(string) $target === (string) UriResolver::resolve($base, UriResolver::relativize($base, $target))

One use-case is to use the current request URI as base URI and then generate relative links in your documents
to reduce the document size or offer self-contained downloadable document archives.

$base = new Uri('http://example.com/a/b/');
echo UriResolver::relativize($base, new Uri('http://example.com/a/b/c')); // prints 'c'.
echo UriResolver::relativize($base, new Uri('http://example.com/a/x/y')); // prints '../x/y'.
echo UriResolver::relativize($base, new Uri('http://example.com/a/b/?q')); // prints '?q'.
echo UriResolver::relativize($base, new Uri('http://example.org/a/b/')); // prints '//example.org/a/b/'.

This method also accepts a target that is already relative and will try to relativize it further. Only a
relative-path reference will be returned as-is.

echo UriResolver::relativize($base, new Uri('/a/b/c')); // prints 'c' as well