In PHP you can use an If Statement to display something on your homepage but something different on the rest of your pages. The search box on Let-Go.net is only displayed only on the homepage but not elsewhere on the site. Below is the code used to do this:

<?php
$uri = $_SERVER['REQUEST_URI'];
if ($uri == "/") {
echo "This is the homepage";
} else {
echo "This is not the homepage";
}
?>

You can change the echos to a line of code or replace them with a PHP include.