Change the site name programmatically for a specific page

Question

I am trying to change the site name when a user enters specific pages on my website. I know the variable for the site name is $site_name and is being retrieved from the system.tpl.html file.

So I am trying to set different site names depending the URL; for example, when a user visits /about_us, the site name should change.

In my template.php file, I have captured the path in a variable.

$path = drupal_get_path_alias();
if ($path == 'about_us') {
  $site_name = 'New title';
}

This won't work.

How can this be achieved?

Answer 1

I think you mean page.tpl.php (not system.tpl.html, which isn't a standard Drupal file).

That said, you need to put your code in a hook_preprocess_page() function inside template.php, and actually alter the template variables that are passed in. At the moment you're just creating a variable called $site_name in the local scope, and Drupal has no way to pick that up.

Try this:

function MYTHEME_preprocess_page(&$vars) {
  $path = drupal_get_path_alias();
  if ($path == 'about_us') {
    $vars['site_name'] = 'New title';
  }
}

Have a look at Setting up variables for use in a template for a bit more info.

Answer 2

The site name is set in template_preprocess_page() using the following code.

  $variables['site_name'] = (theme_get_setting('toggle_name') ? filter_xss_admin(variable_get('site_name', 'Drupal')) : '');

In your theme, or module, you should use code similar to the following one. (Replace mycode with the short name of your module/theme.)

function mycode_preprocess_page(&$variables) {
  if (theme_get_setting('toggle_name') && drupal_get_path_alias() == 'about_us') {
    $variables['site_name'] = filter_xss_admin('The new site name');
  }
}

The call to filter_xss_admin() is not necessary, if you are not using the input obtained from a user.
You should always check the value returned by theme_get_setting('toggle_name'), as the site name could be toggled off for the theme currently used.