I found a solution of removing featured image related to the post when delete the post from this article but, I want to remove all the uploaded media also with post removing. Delete all WP image gallery (included generated thumbnails) that are attached to a post. How can I do this?
You can try using the function get_attached_media() like this:
add_action( 'before_delete_post', 'wps_remove_attachment_with_post', 10 );
function wps_remove_attachment_with_post( $post_id ) {
/** @var WP_Post[] $images */
$images = get_attached_media( 'image', $post_id );
foreach ( $images as $image ) {
wp_delete_attachment( $image->ID, true );
}
}
Note that this will permanently delete all the image files related to this post. If those attachments are used somewhere else as well, those links will be broken.
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