Override / append / prepend to Drupal 7 Node title

Did you ever need to modify a Drupal 7 CMS node title, for example for SEO purpose?

Here's a simple trick with a hook to use the node title and modify it, prepend or append text to the user entered title before output:

function YOURMODULE_process_page(&$variables) {
  // Add prefix / suffix to node titles:
  if(!empty($variables['node'])){
    switch ($variables['node']->type) {
      case 'YOUR-NODE-TYPE-MACHINE-NAME':
        $variables['title'] = 'PREFIX ' . $variables['title'] . ' SUFFIX';
        break;
    }
  }
}

hook_preprocess_page does the trick for you.