Live WYSIWYG Editor / Split View

I want someone to make a split screen view WYSIWYG Editor for me.

The WYSIWYG Editor will be TinyMCE, and the other side will be Ace Code Editor.

It needs to be forwards and backwards working, so If I edit HTML, it updates the editor; if I edit the editor, it updates HTML.

Similar to this tool https://htmltidy.net/ but this tool uses different editors but the same idea.

This NEEDS to be done via AJAX and sent to a PHP script before loading into the other side, I have a function I want to run before it goes to the other side.

You don't need the function; all you need to do is have a PHP script that has a function:
function test($input){
return $input;
}
echo test($datafromajax);

Very simple task.

Here is a working example of Ace Code Editor, with live view, the other side is HTML so it's wrong, but you might be able to use the code to make it quicker - https://codepen.io/GauravKumar-Dev/pen/QWbqeKy