我想上传3个不同的文件在不同的位置在Zend framework2，但我有问题与添加过滤器

use Zend\File\Transfer\Adapter\Http;
use Zend\Validator\File\Size;
use Zend\Validator\File\Extension;

$uploadDir1 = '/path/to/upload/dir1';
$uploadDir2 = '/path/to/upload/dir2';
$uploadDir3 = '/path/to/upload/dir3';

$adapter = new Http();
$adapter->setDestination($uploadDir1);

$fileFilter = new Size(['max' => '10MB']); // 设置文件大小限制
$adapter->addValidator($fileFilter);

$extFilter = new Extension(['extension' => ['jpg', 'png', 'pdf']]); // 设置文件扩展名限制
$adapter->addValidator($extFilter);

if (!$adapter->isValid()) {
    $errors = $adapter->getMessages();
    // 处理文件上传失败的错误
} else {
    $adapter->receive();
    // 处理文件上传成功的逻辑
}

if ($uploadType === 'upload1') {
    $adapter->setDestination($uploadDir1);
} elseif ($uploadType === 'upload2') {
    $adapter->setDestination($uploadDir2);
} elseif ($uploadType === 'upload3') {
    $adapter->setDestination($uploadDir3);
} else {
    // 处理无效的上传类型错误
}