我试图从另外一个添加到一个的SimpleXMLElement,但我得到的错误: Warning: SimpleXMLElement::addChild(): Cannot add child. Parent is not a permanent member of the XML tree $xml = $Global->serializeTradeShowTable();
$xmlDeser
我有问题。我添加了一个新的服务PopupListener.php: use Symfony\Bundle\FrameworkBundle\Routing\Router;
use Symfony\Component\DependencyInjection\ContainerInterface;
class PopupListener
{
protected $router;