Hi; I got the 'Hello World' practice file working then began playing with it. My problem is getting the commenting out to work. I have obviously missed something. Here is the little program: <html> <head> <title>'PHP Test'</title> </head> <body> <?php echo '<p>Hello World</p>' ?> <!-- <?php if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) { <h3>'strpos()must have returned non-false'</h3> <p>'You are using Internet Explorer'</p> <?php } else { ?> <h3>'strpos() must have returned false'</h3> <p>'You are not using Internet Explorer.'</p> <?php } ?> --> </body> </html> <?php /*phpinfo();*/ ?> The HTML manual told me to use <!-- and --> to make comments. The body outside of the comment tags worked on my browser as it should. The stuff in between <!-- ... --> is things that I am trying out (playing with). I wanted to comment out the stuff in order to find the error causing the blank screen that I am getting on my browser. My main concern and to which I don't seem to be able to find an answer is how to comment out properly. Similarly, <?php /*phpinfo();*/ ?> at the bottom is something I used to experiment with commenting out in PHP. Originally I had /* <?php /*phpinfo(); ?> */ placed where it is now -- outside of HTML or any other tags yet the string showed up on my browser screen. That doesn't make sense to me. So, why? -- Regards Bill