title: How to get recently updated MySQL field in a row using PHP (NOT ROW)
body: <p>I have a table named <code>TESTING</code>, with fields e.g. </p>
  
  <blockquote>
    <p>id,city,county,first_name,last_name,update_time etc.</p>
  </blockquote>
  
  <p>I would to get only the field that was recently updated using PHP. </p>
  
  <p>E.g. If last_name was the recently updated field, I would like to display last_name (not the row).</p>