When the form is submitted it will load ok if I comment out $autoin = $_POST[autoin] and $colnum = $_POST[cnumin] The count returned is = to 4.

When the form is submitted it will load ok if I comment out $autoin = $_POST[autoin] and $colnum = $_POST[cnumin] The count returned is = to 4. This is the form:
<form class="" action="https://mypage" method="POST"> CVS File to upload: <input id="cvsfi" name ="cvsfi" type = file required/> Check the box if auto increment: <input id="autoin" name ="autoin" type = checkbox> Column number for key: <input id="cnumi" name="cnumi" size="2" type="number" required/> <input name="submit" type="submit" value="Submit"></form>
This is the page:
` <?php
/**
* Template Name: Template uploadcsv
*
* @package Longevity
*
*
*/