title: Adding to existing value in mySQL database from php
body: <p>I have a table in my database with the following columns:</p>
  
  <pre><code>username - course - assignment1 - assignment2 - assignment3 - participation - total
  </code></pre>
  
  <p>I am using a form that submits these values to the database. What I am trying to do is take the value that's already exists the participation column for the username that was inputed in the form and add the new inputed value to it. (participation = participation + userinput)</p>
  
  <p>How do I do this in PHP after connecting to the database?</p>