Facebook API - Force facebook to reload cache from your website

FacebookDebugger.php

<?php
	class FacebookDebugger
	{
		/*
		 * https://developers.facebook.com/docs/opengraph/using-objects
		 *
		 * Updating Objects
		 *
		 * When an action is published, or a Like button pointing to the object clicked,
		 * Facebook will 'scrape' the HTML page of the object and read the meta tags.
		 * The object scrape also occurs when:
		 *
		 *      - Every 7 days after the first scrape
		 *
		 *      - The object URL is input in the Object Debugger
		 *           http://developers.facebook.com/tools/debug
		 *
		 *      - When an app triggers a scrape using an API endpoint
		 *           This Graph API endpoint is simply a call to:
		 *
		 *           POST /?id={object-instance-id or object-url}&scrape=true
		 */
		public function reload($url)
		{
			$graph = 'https://graph.facebook.com/';
			$post = 'id='.urlencode($url).'&scrape=true';
			return $this->send_post($graph, $post);
		}

		private function send_post($url, $post)
		{
			$r = curl_init();
			curl_setopt($r, CURLOPT_URL, $url);
			curl_setopt($r, CURLOPT_POST, 1);
			curl_setopt($r, CURLOPT_POSTFIELDS, $post);
			curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($r, CURLOPT_CONNECTTIMEOUT, 5);
			$data = curl_exec($r);
			curl_close($r);
			return $data;
		}
	}
?>

usage.php

<?php
	$fb = new FacebookDebugger();
	$fb->reload('http://example.com/');
	$fb->reload('http://example.com/foo');
	$fb->reload('http://example.com/bar');
?>

can confirm this still works in 2020, here a python implementation extending the Facebook Graph SDK

class GraphAPIExt(GraphAPI):

    def scrape_url(self, url, **kwargs):

        assert url, "object URL is required"

        args = {
            "id": url,
            "scrape": True
        }

        args.update(kwargs)

        return self.request("/", method="POST", args=args)

I wrote that code in high school nearly ten years ago (I published it later) and I would never guess that it would be still useful even today.
Thank all of you guys.

Must have a valid access token or a valid url_hmac

can confirm this still works in 2020, here a python implementation extending the Facebook Graph SDK

class GraphAPIExt(GraphAPI):

    def scrape_url(self, url, **kwargs):

        assert url, "object URL is required"

        args = {
            "id": url,
            "scrape": True
        }

        args.update(kwargs)

        return self.request("/", method="POST", args=args)

does this update the image
I've tried another simple approach. get the response but it does not seem to update anything
python code:
res = requests.post(f'{host}/?id={uri}&scrape=true&access_token={token}')

yes, this is what we are using right now in our production environment