function metatag_facebook_preprocess_html in Metatag 7

Implements hook_preprocess_html().

File

metatag_facebook/metatag_facebook.module, line 20

Primary hook implementations for Metatag:Facebook.

Code

function metatag_facebook_preprocess_html(&$variables) {

  // Fall back to hook_rdf_namespaces if the rdf module is enabled.
  if (module_exists('rdf')) {
    return;
  }
  $variables['rdf_namespaces'] .= "\n  xmlns:fb=\"http://ogp.me/ns/fb#\"";
}