title: WordPress table_prefix without "underscore"
body: <p>I'd like to insert some date into WordPress database using the following code:</p>
  
  <pre><code>$table_name = $wpdb-&gt;prefix . "liveshoutbox";
  $wpdb-&gt;insert( $table_name, array(...
  </code></pre>
  
  <p>This worked well... </p>
  
  <p><strong>But I found that this does not work if table prefix does not contain underscore "_" in wp-config.php.</strong></p>
  
  <p>I open "<code>wp-config.php</code>" and found that "<code>$table_prefix</code>" is set to '<code>www</code>' (without underline."</p>
  
  <p>I tried to change the prefix (after installation) but could not.</p>
  
  <p>In this case, how can I resolve the issue?</p>
  
  <p>Thanks for your help.</p>
  
  <p>Added:
  Table names in phyMyadmin:
  <a href="https://i.stack.imgur.com/OcIkS.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OcIkS.jpg" alt="enter image description here"></a></p>