Variable to check if the page is of some other Content Type

Question

The variables $page and $teaser are very helpful but is there a way to check if I'm in a different kind of Content Type? For example, if I made a content type named Products, what can I type in my template file page.tpl.php which will display HTML only if the page being viewed is of type Products?

Answer 1

Place this in your theme's template.php, replacing 'THEMENAME' with the name of your theme:

function THEMENAME_preprocess_page(&$variables, $hook) {
  $variables['some_html'] = '';
  if (isset($variables['node']) && $variables['node']->type == 'product') {
    $variables['some_html'] = '<p>Hello world!</p>';
  }
}

And use this in your page.tpl.php:

<?php print $some_html; ?>

Alternatively, if you want to keep the HTML string in your template file, I would do this in template.php:

function THEMENAME_preprocess_page(&$variables, $hook) {
  $variables['print_extra_header'] = false;
  if (isset($variables['node']) && $variables['node']->type == 'product') {
    $variables['print_extra_header'] = true;
  }
}

And use this in page.tpl.php:

<?php if ($print_extra_header) : ?> <h1>THIS GETS PRINTED</h1> <?php endif; ?>

Make sure to clear the cache after creating the THEMENAME_preprocess_page function, otherwise Drupal will not know it's there and it will not run.