Here are some helpful Magento references and snippets we regularly use.
We work with a variety of clients that have all customer of all sorts of demographics. I find that older clientele seem to try to “game” the system from time to time. A prime example is the one below. With the following regex check. I had to not only check for PO Box and all it’s various permutations. But I also needed to check to see if the user input[…]