Zend Framework - Zend_File_Transfer Upload Handler

When using something like this in Zend:

$upload = new Zend_File_Transfer_Adapter_Http();
$upload->setDestination('/some/directory');
$upload->addValidator(x)
->addValidator(y);
$upload->receive();

Is the uploaded file uploaded first to a tmp directory, validated and then moved to 'some/directory' or is it directly saved into the setDestination directory? If the former, it seems to me that this does the same as "move_uploaded_file" after it's been uploaded to a tmp dir.

Does ZF offer some type of http stream handler to write file to a specific directory natively? i.e something similar to nodejs or django?

Zend_File_Transfer_Adapter_Http use move_uploaded_file after verifying by validators that you assigned.

Look here:

public function receive($files = null)
{
    if (!$this->isValid($files)) {
        return false;
    }
    ... some code ...

    if (!move_uploaded_file($content['tmp_name'], $filename)) {
        if ($content['options']['ignoreNoFile']) {
            $this->_files[$file]['received'] = true;
            $this->_files[$file]['filtered'] = true;
            continue;
        }

        $this->_files[$file]['received'] = false;
        return false;
    }

There are no special mechanisms, it is just a wrapper over the standard function

For direct uploading to your directory you may use something like

$input = fopen("php://input", "r");
$file = fopen("/my/directory/filename.eee", "w");
while ($data = fread($input, 1024)){
    fwrite($file, $data);
}

but it seems in ZF is nothing like this