public function deletePMs($pmIDs)
{
require_once WCF_DIR . 'lib/data/message/attachment/AttachmentsEditor.class.php';
// delete recipients
$sql = "DELETE FROM wcf" . WCF_N . "_pm_to_user\n WHERE pmID IN (" . $pmIDs . ")";
WCF::getDB()->sendQuery($sql);
// delete messages
$sql = "DELETE FROM wcf" . WCF_N . "_pm\n WHERE pmID IN (" . $pmIDs . ")";
WCF::getDB()->sendQuery($sql);
// delete pm hashes
$sql = "DELETE FROM wcf" . WCF_N . "_pm_hash\n WHERE pmID IN (" . $pmIDs . ")";
WCF::getDB()->sendQuery($sql);
// delete attachments
$attachments = new AttachmentsEditor($pmIDs, 'pm');
$attachments->deleteAll();
}