title: Unknown column 'unknown' in 'where clause'
body: <p>When the user is logged in I am trying to find their information so I can display it to them, then I am going to allow them to update their information.</p>
  
  <p>I keep getting an unknown column error, which is my session variable in the where clause but I am not sure why. The code below shows my query that I am using. </p>
  
  <pre><code>$query="SELECT * FROM users WHERE username = ". $_SESSION['login_user'];
  </code></pre>