Joe was an original member of the Dreamweaver development team at Macromedia, and has authored several books on web development. Today he is a senior engineer at Panscopic Corporation. Visit him at


  1. Verify a User’s Email Address Using PHP

    So you published a registration page on your site… and all you get is fake email addresses? Joe shows how to use PHP’s checkdnsrr function to ensure the mail domain exists, and those addresses are valid.