I've learned how to make an array, which is like a hashtable with Key and Value (or Item, Price), but I'm making a shopping cart, so I need Item, Price, Quantity. I can't add a third element.
I can reinvent the wheel here, but I'd like to learn the real way to do this in PHP.
Nothing in an HTTP request can be trusted, including HTTP headers and form data. A form token is a tool that can be used to guard against request forgeries (CSRF). This article shows an improved approach to form tokens, making it more difficult to…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern: