https://www.youtube.com/watch?v=uCLEwoodXMM&list=PLfdtiltiRHWHCzhdE0N1zmeFHlEuqxQvm&index=2

https://github.com/Sammaye/multifile_ajax_uploader

https://github.com/blueimp/jQuery-File-Upload

<script>
  $("#form").submit(function(e) {
    e.preventDefault();
  });
</script>

https://www.tutorialspoint.com/how-to-stop-refreshing-the-page-on-submit-in-javascript

https://www.sourcecodester.com/php/13333/file-management-system-very-complete-using-phpmysqli.html

https://github.com/opendocman/opendocman

https://www.sourcecodester.com/php/14454/file-management-system-using-phpmysql.html

https://phpgurukul.com/directory-management-system-using-php-and-mysql/

https://www.sourcecodester.com/php/7652/document-management-system.html

https://www.sourcecodester.com/php/13333/file-management-system-very-complete-using-phpmysqli.html