There's none. PHP is a server-side language, and will not make any code the user can interact with, since all parsing is done before the user gets the output. If you write: <? if($_GET[test] == "yes"){ echo "YES"; }else{ echo "NO"; } ?> PHP: You wouldn't see that code if you're viewing the page source. if you just go to filename.php, it will say "NO" in the source, if you visit filename.php?test=yes, it will say "YES" in the source. You're not able to see if(....) etc, because that parsing is done server-side. To write a link to the html, you would simply use: echo '<a href="something">Visit my website</a>';