title: Digital Signatures with PHP
body: <p>Is it possible to let users e-sign a document?</p>
  
  <p><strong>Scenario</strong></p>
  
  <ol>
  <li>I upload document for a user on my website to review and sign</li>
  <li>User logs in, reviews the document and then somehow digitally signs it. ( not a image of their signature )</li>
  <li>I receive document with some way of verifying they legally signed it.</li>
  </ol>
  
  <p>I would prefer the user does not need to download, sign with some third party tool and then upload the document.  I want them to somehow perform this action on the webpage maybe by typing there full name in a box against the document while they are logged in.</p>