Thành viên:Nguyenthephuc/Note: Facebook open graph not clearing cache

Có hai giải pháp giải quyết vấn đề này, một thủ công và một script.

Thủ công

Bước 1: Go to http://developers.facebook.com/tools/debug

Bước 2: Enter the URL following by fbrefresh=CAN_BE_ANYTHING

Examples:

1. http://www.example.com?fbrefresh=CAN_BE_ANYTHING
2. http://www.example.com?postid=1234&fbrefresh=CAN_BE_ANYTHING
3. OR visit: http://developers.facebook.com/tools/debug/og/object?q=http://www.example.com/?p=3568&fbrefresh=89127348912

I was having the same issue last night, and I got this solution from some website.

Facebook saves your cache thumbnail. It won't refresh even if you delete the thumnail/image from your server. But Facebook allows you to refresh by using fbrefresh

I hope this helps.

Script jquery

If you have many pages and don't want to refresh them manually - you can do it automatically.

Lets say you have user profile page with photo:

$url = 'http://'.$_SERVER['HTTP_HOST'].'/'.$user_profile;
$user_photo = 'http://'.$_SERVER['HTTP_HOST'].'/'.$user_photo;

<meta property="og:url" content="<?php echo $url; ?>"/>
<meta property="og:image" content="<?php echo $user_photo; ?>"

Just add this to your page:

$.post(
    'https://graph.facebook.com',
    {
        id: '<?php echo $url; ?>',
        scrape: true
    },
    function(response){
        console.log(response);
    }
);

Nguồn

• http://stackoverflow.com/questions/5776567/facebook-open-graph-not-clearing-cache