If anyone with php knowledge can help I would sure appreciate it. I would like to create a dynamic meta og:image tag to add to the header.tpl.php file to extract the post image dynamically from each post.

Here's what happens now, anytime I share a post across social media, it shows the correct post image, but the moment it's posted as a new standalone post it takes the larger image from the post, and replaces it with a thumbnail image named flatboard.png image.

Yet if I respond to a post on Facebook, it adds the correct image as a thumbnail sized image and this works perfectly.

Have tried countless things and am getting nowhere. If anyone has any ideas, could really use some help.

Figured this out! Now posts correctly share the jpg image on Facebook instead of the default flatboard.png image. If you want to fix your forum code add this loop to your header.tpl.php file and it will output an og:image meta tag which Facebook algo will then choose as the correct image for each post. This assumes the post image is in jpg format.

<?php
if ($cur === 'viewTopic' && isset($out['content'])) {

    // Extract the file ID from the URL
    $url_parts = explode('/', $_SERVER['REQUEST_URI']);
    $file_id = end($url_parts);

    if ($file_id) {
        $file_path = "data/topic/{$file_id}.dat.php";

        // Check if the file exists and is readable
        if (file_exists($file_path) && is_readable($file_path)) {
            // Read the file content
            $file_content = file_get_contents($file_path);

            // Extract the first URL ending with .jpg or .jpeg
            preg_match('/(https?:\/\/[^\s]*\.(?:jpg|jpeg))/', $file_content, $image_matches);
            $image_url = isset($image_matches[1]) ? $image_matches[1] : '';

            if ($image_url) {
                echo '<meta property="og:image" content="' . $image_url . '" />';
            }
        } else {
            echo '<!-- File not found or not readable -->';
        }
    } else {
        echo '<!-- No File ID found -->';
    }
}
?>