Question

While I was creating my custom template for node, I found out that Drupal adds extra html.

so I changed page.tpl.php like below to test

<div style='height:300px'>
  <?php print render($page['content']); ?>
</div>

and then changed node.tpl.php to

hello

the output is:

<div style='height:300px'> 
    <div class="region region-content"> 
    <div id="block-system-main" class="block block-system"> 


  <div class="content"> 
    hello  </div> 
</div> 
  </div> 
</div> 

where do all those extra tags come from?

I actually expected <div style='height:300px'>hello</div>

Answer 1

drupal_render() can be used to render so called renderable arrays. These are self-contained, they tell render() which theme function/template to use.

Try dpm($page[‘content’]), that should then have a ‘#theme’ key that contains that information.