function amp_html_head_alter in Accelerated Mobile Pages (AMP) 7

Implements hook_html_head_alter().

File

./amp.module, line 1590

Code

function amp_html_head_alter(&$head_elements) {

  // Make canonical links absolute for AMP content.
  if (amp_is_amp_request()) {
    foreach ($head_elements as $key => &$tag) {
      if (strpos($key, 'drupal_add_html_head_link:canonical:') === 0) {
        if (isset($tag['#attributes']['href'])) {
          $amphtml_url = $tag['#attributes']['href'];

          // Double check that the URL is relative.
          if ($amphtml_url == drupal_get_normal_path($amphtml_url)) {
            $absolute_url = url($amphtml_url, array(
              'absolute' => TRUE,
            ));
            $tag['#attributes']['href'] = $absolute_url;
          }
        }
      }
    }
  }
}