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

function encode_uri($url){
    $exp = "{[^0-9a-z_.!~*'();,/?:@&=+$#%\[\]-]}i";
    return preg_replace_callback($exp, function($m){
        return sprintf('%%%02X',ord($m[0]));
    }, $url);
}