title: HTML/PHP/JS - Upload File while filling Form
body: <p>i have a form with a Photo Upload Input. I want the picture to be uploaded before submitting the form to speed up the submit. </p>
  
  <p>the form should be able to upload multiple files and should show a progressbar + preview.</p>
  
  <p>how i can do this? </p>
  
  <p>MetinKale38</p>