My phpBB3 forum has been running for about a year with no problems, to register to the forum I would just give the url to an individual to register and they would have access. The problem I am having now is that people are registering on the forum that should not be there. Now do I set it up that when someone new registers they have to be approved first before access is granted?
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: