If I was writing a reply to a Craigslist advertisement, I would say something along the lines of "Hello [Username], thank you for contacting me". Now, I want [Username], to be based off of whatever I type in the URL. Here is what I have so far. Code: <?php $name = $_GET['name']; $time = $_GET['time']; ?> Then wherever I want it to be included, I just write "Hello <?php echo $name; ?>, thank you for contacting me". Now, it works fine, but only when I actually define a name. If I don't, it throws up this error. I really don't know what I'm doing, it took long enough to even find what I was looking for, as I have no idea what the terminology would be. Would anyone be kind enough to help? Also, I structure my URL this way, I assume it's the correct form. Now, that's in clear plain view, how might I obfuscate the URL? I suppose encoding the URL is my only option. It doesn't really hide anything, just makes it more difficult to read. Any suggestions?