The problem is that the "post" method .php file *always* catches this line:
// take some action
Even when I make a selection in the bottom dropdown the $frm_cbo_top var if statement gets caught because the code flow goes into that section - I want the $frm_cbo_bottom to catch is I select that dropdown and the $frm_cbo_top to catch if I select that dropdown - what am I missing here?
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption. Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
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: