protected function decodeString($encoded)
    {
        if ($encoded === self::NULL) {
            return NULL;
        } else {
            return strtr($encoded, self::$decodeMap);
        }
    }
protected function decodeString($encoded)
    {
        if ($encoded === self::NULL) {
            return NULL;
        } else {
            return strtr($encoded, self::$decodeMap);
        }
    }
protected function decodeString ( $ encoded ) { if ( $ encoded === self :: NULL ) { return NULL ; } else { return strtr ( $ encoded , self :: $ decodeMap ) ; } }
Decode string from server

@param string $encoded
@return string
Decode string from server