How to save current state of html body php

I have a html website with Sortable.js. I want to save the current state of the body when a user rearranges the list and clicks a save button. I don’t want it to save to local storage but directly to the hosted file, replacing the body html with the new rearranged version.

<body>
  <div class='wrapper'>
    <ul class='list'>
      <li class='item' contenteditable='true'>Item 1</li>
      <li class='item' contenteditable='true'>Item 2</li>
      <li class='item' contenteditable='true'>Item 3</li>
    </ul>
    <button class='add-item'>add new item</button>
    <button class='save'>save changes</button>
  </div>
</body>

I believe what I’m trying to achieve is very simple and can be done using php and ajax, but I can’t find any direct answer to my question.

Currently there is only one index.php file.

Security is no issue.

source https://stackoverflow.com/questions/69328939/how-to-save-current-state-of-html-body-php

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