Hello!
I want to ask for help!
When I try to share a topic, the site logo appears instead of the topic image. Which file and where should I modify to display the image attached to the topic when sharing the topic?
Thank you very much!

I've solved it!
@nguoianphu Based on your description!
By using code
// Get image link for Facebook sharing

    // search the first image link from the first post of the topic
    $image = $posts[0]['message'];

    // initialize the image link with the default thumbnail image
    $img_src = 'https://domain.com/logo.png';

   // pattern to get the src value in the img tag
    $pattern = '/src="([^"]*)"/';

  // If found image link, use it. Else, use the default
    preg_match($pattern, $image, $matches);
    if (!empty($matches[1])){
        $img_src = $matches[1];
    }
    unset($matches);

   // Set the Open Graph image property
    \CODOF\Store::set('og:image', $img_src);

the sys/controller/forum.php
Thank you for the infot