title: proper way of inserting data with id as auto-increment in mysqli
body: <p>can someone please verify the proper way of inserting data using MYSQLI?</p>
  
  <p>i need to insert comment data into the table with ID set as auto-increment. do i just leave the values for id as <em>blank</em> ?</p>
  
  <pre><code>$db = dbConnect();
  $query = "INSERT INTO comments values ('', '$comment')";
  $db-&gt;query($query);
  </code></pre>