isopod.cool/nav.php

<?php

$host = $_SERVER['HTTP_HOST'];

function echolink($url, $name) {
  global $host;
  if("/$url/" != $_SERVER['REQUEST_URI']) {
    echo "<a href='https://$host/$url/'>$name</a> ";
  } else {
    echo "<span>$name</span> ";
  }
}
echo "<nav id='main-nav'>";
if($_SERVER["DOCUMENT_ROOT"] !== getcwd()) {
  echo "<a href='https://$host/'>home</a>";
}
echolink("about", "about");
echolink("uses", "uses");
echolink("music", "music");
echolink("blog", "blog");
echolink("links", "links");
echolink("stuff", "stuff");
echolink("guestbook", "guestbook");
echolink("stats", "stats");
echolink("greenhouse", "greenhouse");
echolink("etc", "etc");
echo("</nav>")
?>