Nette\Neon\Encoder::encode PHP Method

    public function encode($var, $options = NULL)
    {
        if ($var instanceof \DateTimeInterface) {
            return $var->format('Y-m-d H:i:s O');
        } elseif ($var instanceof Entity) {
            if ($var->value === Neon::CHAIN) {
                return implode('', array_map([$this, 'encode'], $var->attributes));
            }
            return $this->encode($var->value) . '(' . (is_array($var->attributes) ? substr($this->encode($var->attributes), 1, -1) : '') . ')';
        }
        if (is_object($var)) {
            $obj = $var;
            $var = [];
            foreach ($obj as $k => $v) {
                $var[$k] = $v;
            }
        }
        if (is_array($var)) {
            $isList = !$var || array_keys($var) === range(0, count($var) - 1);
            $s = '';
            if ($options & self::BLOCK) {
                if (count($var) === 0) {
                    return '[]';
                }
                foreach ($var as $k => $v) {
                    $v = $this->encode($v, self::BLOCK);
                    $s .= ($isList ? '-' : $this->encode($k) . ':') . (strpos($v, "\n") === FALSE ? ' ' . $v . "\n" : "\n" . preg_replace('#^(?=.)#m', "\t", $v) . (substr($v, -2, 1) === "\n" ? '' : "\n"));
                }
                return $s;
            } else {
                foreach ($var as $k => $v) {
                    $s .= ($isList ? '' : $this->encode($k) . ': ') . $this->encode($v) . ', ';
                }
                return ($isList ? '[' : '{') . substr($s, 0, -2) . ($isList ? ']' : '}');
            }
        } elseif (is_string($var) && !is_numeric($var) && !preg_match('~[\\x00-\\x1F]|^\\d{4}|^(true|false|yes|no|on|off|null)\\z~i', $var) && preg_match('~^' . Decoder::PATTERNS[1] . '\\z~x', $var)) {
            return $var;
        } elseif (is_float($var)) {
            $var = json_encode($var);
            return strpos($var, '.') === FALSE ? $var . '.0' : $var;
        } else {
            return json_encode($var, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        }
    }

 /**
  * @param array $data
  */
 private function setConfigData(array $data)
 {
     $encoder = new Nette\Neon\Encoder();
     $file = new File($this->getConfig() . self::LOCAL);
     $file->createNewFile();
     $file->rewriteSafe($encoder->encode($data));
 }