How do I hide the page title based on node type using template_preprocess_page()?

Question

In Drupal 7, this was possible. (See How to hide page title based on node type using template_preprocess_page().)

function MYTHEME_preprocess_page(&$variables) {
  if (!empty($variables['node']) && $variables['node']->type == 'concert') {
    $variables['show_title'] = FALSE;
  }
}

What is the equivalent in Drupal 8?

Answer 1

OUTDATED - please use this solution instead ...

In D8 i used

function MYTHEME_preprocess_page(&$variables) {
    if (!empty($variables['node']) && $variables['node']->getType() == 'page') {
        $variables['title'] = '';
    }
}

You still find the "node" object but you can't simply call the "type". The variable is protected, so you have to get the value via the function getType(). To get an overview install Devel and print with Kint the methods. This should only be a simple help, but maybe someone can deeper explain the concepts. Is it better to unset $variables['title'] in some way then to use $variables['title'] = ''?

Answer 2

Similar to @joekers it was not working for me either and had to use theme_preprocess_page_title() here is the details. Put this in your MY_THEME.theme file or modify that function if it already exists.

function MYTHEME_preprocess_page_title(&$variables) {
    $node = \Drupal::routeMatch()->getParameter('node');
    if( $node->getType() == 'page' ) {
        $variables['title'] = "";
    }
}

To use it you might have to substitute the variable page with your content type machine name.

Answer 3

Depending upon how your pages are set in Drupal 8 (say using Blocks or Panels), coding fixes may not be necessary at all.

If you are using Blocks for layout, say, go to: Admin > Structure > Block Layout

And select the Page Title block, then make your desired visibility/hidden settings.

Here's a look at doing this for hiding the page title for the front page and every user profile:

If you are using another method to display content (say Panels/Panels Everywhere), there's a similar process in Page Manager to do so.

Answer 4

For some reason this wasn't working for me in theme_preprocess_page() so I had to use theme_preprocess_page_title() as suggested by Twig debug.