Many old projects have bad code, but the budget doesn't exist to rewrite the codebase. You can update this code to be safer by introducing contemporary input validation, sanitation, and safer database queries.
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:
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing.
Set up your basic HTML file. Open your form tag and set the method and action attributes.:
Set up your first few inputs one for the name and …