So I am back to trying to fix the Canada Post shipping module since the developer of it hasn't bothered.
I have come up with a desired fix, but I know it's not a correct way to fix it.
Being my coding skills suck, I am looking for a little help with it from anyone.

So the problem with it is that when there is no Postal Code at checkout, I kicks out an error:

Error Server: /rs/ship/price: cvc-simple-type 1: element {http://www.canadapost.ca/ws/ship/rate-v2}postal-code of type {http://www.canadapost.ca/ws/ship/rate-v2}postalcodetype may not be empty

So my temporary fix is to change the following:

$ErrorDesc = $dom->getElementsByTagName('description')->item(0)->nodeValue;

to

$ErrorDesc = "Postal Code Required";

I think the proper way to fix this is to have:

$ErrorDesc = $dom->getElementsByTagName('description')->item(0)->nodeValue;

if ($ErrorDesc = "/rs/ship/price: cvc-simple-type 1: element {http://www.canadapost.ca/ws/ship/rate-v2}postal-code of type {http://www.canadapost.ca/ws/ship/rate-v2}postalcodetype may not be empty") {

$ErrorDesc = "Postal Code Required";

I think I am in the right direction, but thinking the issue is probably with the {} brackets.

So can someone help me out with the correct way to correct the above line?

Thanks for any help.