Submit Form Equivalent To WML

Question

I'm playing a little bit with WML with PHP, then I want to know what is the equivalent of this on WML 1.0:

<form action="upload_file.php" method="post">
<label for="file">File:</label><br />
<input type="file" name="file" id="file" /><br />
<input type="submit" name="submit" value="Submit" />
</form>