title: How to convert signature pad signature into pdf file by ajax, javascript and php?
body: <p>I have integrated signature pad in HTML, CSS and JavaScript from <a href="https://codepen.io/kunukn/pen/kkbNvx" rel="nofollow noreferrer">this site</a> and have activated save button to save signature in <code>.png</code> file but now I need to change from <code>.png</code> to <code>.pdf</code> file.</p>
  
  <p>How can I achieve this?</p>
  
  <p><a href="https://drive.google.com/open?id=1rzKYXV0vdQk-qqX7PuWR0w0QeikWwE59" rel="nofollow noreferrer">Here</a> are my google drive code files</p>