Pull value from link?

Question

Parsing

Hello.
There is a block like

<a target="_blank" href="/number?transaction=11080041611&amp;direction=OUT" class="cheque">
                           Просмотр чека
                        </a>

You need to get the transaction= value, that is, in this case 11080041611

$result = $xpath->query( './/div[@class="operations"]', $row );// тут получаем данные в блоке div
$transaction[ 'operations' ] = trim( $result->item( 0 )->nodeValue );// заносим в массив данные

Tell me what I'm doing wrong