It's easy:

1. Build a template file and call it e.g. test.tpl and place it in the template/ folder:

       <!-- Start Test Content -->
       <h2>{testTitle}</h2>
       <span>{testContent}</span>
       <!-- End Test Content -->

2. Build a PHP file called e.g. test.php (the base name must match with that of the template file) and save it in the root of phpMyFAQ:

   <?php
   
   $testTitle = 'My first PMF page';
   $testContent = '';
   
   for($i=0; $i<10; $i++) {
       $testContent .= 'Line '.$i.'<br />';
   }
   
   
   $tpl->processTemplate ('writeContent', array(
                               'testTitle'     => $testTitle,
                               'testContent'   => $testContent
                               )
                           );
   $tpl->includeTemplate('writeContent', 'index');
   ?>
   

3. Register the variable e.g. "test" in config/constants.php in the array $allowedVariables;
4. Now you can access the new test page via index.php?action=test.