function custom_update_uploaded_file_name($file) {
if (isset($_POST['post_id']) && $_POST['post_id'] != 0) {
$post_id = intval($_POST['post_id']);
$post = get_post($post_id);
if ($post && !in_array($post->post_type, ['post', 'page'])) { // Modify for custom post types only
$post_title = sanitize_title($post->post_title);
$original_filename = $file['name'];
$file_ext = pathinfo($original_filename, PATHINFO_EXTENSION);
$file_name_only = pathinfo($original_filename, PATHINFO_FILENAME);
// Construct new file name
$new_filename = "{$post_title}-{$post_id}-{$file_name_only}.{$file_ext}";
// Update file name in the upload process
$file['name'] = $new_filename;
}
}
return $file;
}
add_filter('wp_handle_upload_prefilter', 'custom_update_uploaded_file_name');