Zend Framework 2 file upload

Example:
Note: Remember to set destination and filter to adaptor before running isValid or Receive,
Because setting filter or destination after running isvalid will cause the isvalid to add 2 times check on the file, one as tmp_name and another as destination name..
which will cause Count validator to fail!


    $sDestination .= getcwd() . "/public/assets";
 
    if (!is_dir($sDestination)) {
      if (!@mkdir($sDestination, 0777, true)) {
        throw new \Exception("Unable to create destination: " . $sDestination);
      }
    }
    $size = new Size(array('min' => 10, "max" => 10000000)); //minimum bytes filesize
    $count = new Count(array("min" => 0, "max" => 1));
    $extension = new Extension(array("extension" => array("jpg", "png", "swf")));

    $oFile = $this->params()->fromFiles('txtFile1');
 
    $adapter = new \Zend\File\Transfer\Adapter\Http();
    $adapter->setValidators(array($size, $count, $extension), $oFile['name']);
    $adapter->setDestination($sDestination);
 
    if (! $adapter->isValid()) {
      $dataError = $adapter->getMessages();
      $error = array();
      foreach ($dataError as $key => $row) {
        $error[] = $row;
      }
      $form->setMessages(array('txtFile1' => $error));
    } else {
   
      if ($adapter->receive($oFile['name'])) {
        $form->get("txtFile1")->setValue($adapter->getFileName());
      } else {
        $form->setMessages(array('txtFile1' => "Receive failed"));
      }
    }