Translate character encodings of the querystring with ext/iconv.
-> **Note:** This method is only available when ext/iconv support was enabled at build time.
+> ***NOTE:***
+> This method is only available when ext/iconv support was enabled at build time.
## Params:
## Throws:
-* http\Exception
+* http\Exception\InvalidArgumentException
+* http\Exception\BadConversionException