add_action('before_delete_post', 'da_auto_delete_post_media', 10);
function da_auto_delete_post_media($post_id) {
if (get_post_type($post_id) !== 'post') {
return;
}
$media_ids = [];
$thumbnail_id = get_post_thumbnail_id($post_id);
if ($thumbnail_id) {
$media_ids[] = (int) $thumbnail_id;
}
$attached_media = get_posts([
'post_parent' => $post_id,
'post_type' => 'attachment',
'post_status' => 'inherit',
'posts_per_page' => -1,
'fields' => 'ids',
'no_found_rows' => true,
'update_post_meta_cache' => false,
'update_post_term_cache' => false,
]);
if (!empty($attached_media)) {
$media_ids = array_merge($media_ids, $attached_media);
}
$post = get_post($post_id);
if ($post && !empty($post->post_content)) {
$content = $post->post_content;
if (preg_match_all('/wp-image-(\d+)/i', $content, $matches)) {
$media_ids = array_merge($media_ids, $matches[1]);
}
if (preg_match_all('/"id":(\d+)(?=[,\}])/', $content, $matches)) {
$media_ids = array_merge($media_ids, $matches[1]);
}
if (preg_match_all('/\[gallery[^\]]*ids="([^"]+)"/i', $content, $matches)) {
foreach ($matches[1] as $gallery_ids) {
$media_ids = array_merge(
$media_ids,
array_map('trim', explode(',', $gallery_ids))
);
}
}
if (preg_match_all('/"ids":\[([^\]]+)\]/i', $content, $matches)) {
foreach ($matches[1] as $gallery_ids) {
$media_ids = array_merge(
$media_ids,
array_map(
'trim',
explode(',', str_replace(' ', '', $gallery_ids))
)
);
}
}
}
$media_ids = array_unique(array_filter(array_map('intval', $media_ids)));
if (empty($media_ids)) {
return;
}
global $wpdb;
$id_list = implode(',', $media_ids);
$valid_attachments = $wpdb->get_col("
SELECT ID
FROM $wpdb->posts
WHERE ID IN ($id_list)
AND post_type = 'attachment'
");
if (!empty($valid_attachments)) {
foreach ($valid_attachments as $attachment_id) {
wp_delete_attachment((int) $attachment_id, true);
}
}
}
