Encodes form_data_set
into a value of type "application/x-www-form-urlencoded".
Encodes as defined in the HTML 4.01 spec. Unlike [func@form_encode_hash], this preserves the ordering of the form elements, which may be required in some situations.
See also: [[email protected]_from_encoded_form].
form_data_set |
a datalist containing name/value pairs |
the encoded form |