post/FileUpload.php

<?php
namespace Post;

class FileUpload extends FormField {
	protected $file;
	protected $error=UPLOAD_ERR_NO_FILE;

	public function loadFromEnv($name) {
		$this->error=$_FILES[$name]['error'];
		$this->value=$_FILES[$name]['name'];
		$this->file=$_FILES[$name]['tmp_name'];
	}

	public function getTmpPath() {
		if ($this->error > 0) throw new UploadException("Upload failure", $this->error);
		return $this->file;
	}
}