Swift_CharacterStream_ArrayCharacterStream::_reloadBuffer PHP Method

    private function _reloadBuffer($fp, $len)
    {
        if (!feof($fp) && ($bytes = fread($fp, $len)) !== false) {
            $buf = array();
            for ($i = 0, $len = strlen($bytes); $i < $len; ++$i) {
                $buf[] = self::$_byteMap[$bytes[$i]];
            }
            return $buf;
        }
        return false;
    }