Sabre\CardDAV\Backend\PDO::getCard PHP Method

    function getCard($addressBookId, $cardUri)
    {
        $stmt = $this->pdo->prepare('SELECT id, carddata, uri, lastmodified, etag, size FROM ' . $this->cardsTableName . ' WHERE addressbookid = ? AND uri = ? LIMIT 1');
        $stmt->execute([$addressBookId, $cardUri]);
        $result = $stmt->fetch(\PDO::FETCH_ASSOC);
        if (!$result) {
            return false;
        }
        $result['etag'] = '"' . $result['etag'] . '"';
        return $result;
    }

 /**
  * @depends testGetCard
  */
 function testDeleteCard()
 {
     $this->backend->deleteCard(1, 'card1');
     $result = $this->backend->getCard(1, 'card1');
     $this->assertFalse($result);
 }