PHP. Руководство по PHP. 2005
rawurldecode
rawurldecode
Description
string rawurldecode (string str)Returns a string in which the sequences with percent
(%) signs followed by two hex digits have been
replaced with literal characters.
Замечание:
rawurldecode() does not decode plus symbols ('+')
into spaces. urldecode() does.
See also rawurlencode(),
urldecode() and
parse_url
rawurlencode