php - 与我的菜单作斗争 - 为什么这个坏了？ - php 被打印出来，没有被执行？

Question

我对此有点陌生，这个问题快把我逼疯了..

标签“?= $active[0] ?”在

上被打印而不是被执行。

感谢任何指点...

$url = $_SERVER['REQUEST_URI'];
$active = 'class=""';

switch($url){

    case('/SSPCorporate/index.php'):
        $active[0] = ' class="active"';
    break;

    case('/SSPCorporate/about.php'):
    case('/SSPCorporate/our-customers.php'):
    case('/SSPCorporate/our-partners.php'):
    case('/SSPCorporate/our-clients.php'):
    case('/SSPCorporate/our-standards.php'):
    case('/SSPCorporate/our-awards.php'):
        $active[1] = ' class="active"';
    break;

    case('/SSPCorporate/solutions.php'):
        $active[2] = ' class="active"';
    break;

    case('/SSPCorporate/services.php'):
        $active[3] = ' class="active"';
    break;

    case('/SSPCorporate/sustainability.php'):
    case('/SSPCorporate/what-are-we-doing.php'):
    case('/SSPCorporate/what-can-you-do.php'):
    case('/SSPCorporate/what-we-support.php'):
    case('/SSPCorporate/references.php'):
        $active[4] = ' class="active"';
    break;

    case('/SSPCorporate/healthcare.php'):
        $active[5] = ' class="active"';
    break;

    case('/SSPCorporate/blog/'):
        $active[6] = ' class="active"';
    break;

    case('/SSPCorporate/contact.php'):
        $active[7] = ' class="active"';
    break;

}

?>

echo($url);

?>

<nav>
  <ul class="clearfix">
    <li id="first" <?= $active[0] ?> <a href="index.php" class="Bold">Home</a></li>
    <li <?= $active[1] ?> <a href="about.php" class="Bold">About</a></li>
    <li <?= $active[2] ?> <a href="solutions.php" class="Bold">Solutions</a></li>
    <li <?= $active[3] ?> <a href="services.php" class="Bold">Services</a></li>
    <li <?= $active[4] ?> <a href="sustainability.php" class="Bold">Sustainability</a></li>
    <li <?= $active[5] ?> <a href="healthcare.php" class="Bold">Healthcare</a></li>
    <li <?= $active[6] ?> <a href="/blog/" class="Bold">Blog</a></li>
    <li id="last" <?= $active[7] ?> <a href="contact.php" class="Bold">Contact</a></li>
  </ul>
</nav>

Answer 1

有可能是 PHP 的 short_open_tag指令被禁用。

这实际上是一件好事，因为它们会导致代码的可移植性降低，因此不应使用。

我建议使用 <?php echo $active[0] ?>相反。