PHP REQUEST_URI different ways

I have this code and the problem is the selected part. So if im in report.php the report tab should be another color wich it is when i do it this way.

  <nav class="nav">
  <a class="<?= basename($_SERVER['REQUEST_URI']) == "me.php" ? "selected" : "" ?>" href="me.php">Hem</a>
  <a class="<?= basename($_SERVER['REQUEST_URI']) == "report.php" ? "selected" : "" ?>" href="report.php">Redovisning</a>
  <a class="<?= basename($_SERVER['REQUEST_URI']) == "about.php" ? "selected" : "" ?>" href="about.php">Om</a>
  <a class="<?= basename($_SERVER['REQUEST_URI']) == "multipage.php" ? "selected" : "" ?>" href="multipage.php">Multipage</a>

but when i try it this way it doesnt work. What can i do to make it work?

<nav class="nav2">
    <a class="<?= basename($_SERVER['REQUEST_URI']) == "?page=intro" ? "selected" : "" ?>"  href="?page=intro">Introduction page</a>