Export $fb_ variables value

First, many thanks Marco for your useful plugin.
I’m trying to use the values of some variables values after calculated in your webdados_fb_open_graph() function.
So I’ve added an external class to export these values in a file called:
include/class-wonderm00n_og_export.php
Here’s the code:

if ( ! class_exists( 'wonderm00n_og_export' ) ) {
  class wonderm00n_og_export {
    public static $instance;
    public $locale;
    public $title;
    public $url;
    public $type;
    public $desc;
    public $image;
    public $image_additional;
    public function __construct() {
      self::$instance = $this;
    }
    public static function get_instance() {
      if (self::$instance === null) {
        self::$instance = new self();
      }
      return self::$instance;
    }
    public function save_external( $locale, $title, $url, $type, $desc, $image, $image_additional ) {
      $this->locale = $locale;
      $this->title = $title;
      $this->url = $url;
      $this->type = $type;
      $this->desc = $desc;
      $this->image = $image;
      $this->image_additional = $image_additional;
    }
  } // end class wonderm00n_og_export
} // end class_exists
$wm00nOgExp = new wonderm00n_og_export();

And few lines just before the end of webdados_fb_open_graph() function:

function webdados_fb_open_graph() {
  [...]

  include_once 'includes/class-wonderm00n_og_export.php';
  $wm00nOgExp->save_external( $fb_locale, $fb_title, $fb_url, $fb_type, $fb_desc, $fb_image, $fb_image_additional );
  echo $html;
}

In this way I can refer to any of these variable in my pages, after that action wp_head fires. For instance :

$canonical = "";
if(class_exists( 'wonderm00n_og_export' )) {
  $wm00nOgExp = wonderm00n_og_export::get_instance();
  if(isset($wm00nOgExp->url)) $canonical = $wm00nOgExp->url;
}

It should be better if you could calculate these values before wp_head action, to be useful also for other wp_head functions.

Hope you can integrate this code, or something like this, in your future release of the plugin.

https://www.ads-software.com/plugins/wonderm00ns-simple-facebook-open-graph-tags/