URL query string

A string appended to the URL for passing parameter values in a GET request. The query string must begin with a question mark (?). The parameters must be in name/value pairs, with the pairs separated by ampersands (&). The names and values must be URL-encoded. For example, white space is encoded as +. The following URL shows an example of a query string:

  http://www.myapp.com/sayhello?name=Fido+Filbert&type=Dog