title: Mysqli code changes
body: <p>i am adapting this code to Mysqli, but is gives an error, i cannot see the error, please help.</p>
  
  <pre><code>$sql = "INSERT INTO test_xml ('title', 'artist', 'duration') VALUES ('$title', '$artist', '$duration')";        
  $result = mysqli_query($con, $sql);
  </code></pre>
  
  <p>the old code worked good:</p>
  
  <pre><code>$sql = "INSERT INTO `test_xml`  (`title`, `artist`, `duration`)"
              . "VALUES ('$title', '$artist', '$duration')";
  $result = mysql_query($sql);
  </code></pre>