Plus sign in query string
+ sign has a semantic meaning in the query string. It is used to represent a space. Another character that has semantic importance in the query string is
& which is used to separate the various
var=value pairs in the query string.
Most server side scripts would decode the query parameters before using them, so that a
+ gets properly converted to a space. Now, if you want a literal
+ to be present in the query string, you need to specify
+ sign in the query string is URL-decoded to a space.
%2B in the query string is URL-decoded to a + sign.
See the difference between
In the above examples, Google's server script is URL-decoding the query parameters and then using them to do the search.
URL-encoding is nothing but
% sign followed by the hex-code of the special character. For example, we know that the hex code of
A is 0x41 (decimal: 65). Try this:
Hope this makes URL-encoding clear.
So, if you want the
+ signs in its query parameters and a server side script would process the query parameters after URL-decoding it, you should URL-encode the query parameters in the URL before using issuing the HTTP get request so that all
+ signs are converted to
%2B's when the request reaches the server side script. Now when the server side script URL-decodes the query string, all
%2B's gets converted back to
+ signs which is what you want.
var encodedURL = "http://example.com/foo.php?var=" + encodeURIComponent(param);
You should URLEncode your query string values to make sure any special characters are not lost.