urldecode
Decodes any encoded sequences %##. The "plus" symbol (+) is decoded into a space character.Example: «%D1%81%D1%82%D1%80%D0%BE%D0%BA%D0%B0» → «строка».
It yields a result similar to the PHP function urldecode().
Example: «%D1%81%D1%82%D1%80%D0%BE%D0%BA%D0%B0» → «строка».