Variables added to vchart joomla sql query not picked up

问题

The vchart module installed in Joomla, allows you to create charts with your own sql query. It even suggests by example that you can add a custom variable in the query, stating:

You can also include dynamic variables in your SQL query. You just need to enter variable name within curly braces. e.g. {catid}.
{loggedinuserid} is reserverd for Logged-in User

So I assume I would need to create a php variable $username for example and if this is in page where I embedded the chart it should get picked up by {username} in sql query?

However seems that php code embedded by custompage builder just shows as text

 <pre class="language-php"><code>echo 'hi';</code></pre>

prints out

echo 'hi';

and doesn't execute php. Has anyone got an ideas on how to make the php variable available?

来源：https://stackoverflow.com/questions/58121940/variables-added-to-vchart-joomla-sql-query-not-picked-up