使用 php 在菜单项上设置活动类

我有一个由

• 元素和一个 class="active" 元素组成的简单菜单，用于标记当前页面.$_get[] 传递一个变量，通过 url 选择特定页面:?pg=PAGE.

  I have a simple menu made of <ul><li> elements and a class="active" in place to mark the current page. A variable is passed by $_get[] to select the specific page by url: ?pg=PAGE.

  我对 php 还很陌生，还在学习中.这工作得很好，但我觉得应该有一种更简单、更短的方法.

  I am fairly new to php and still learning. This works just fine, but i feel there ought to be a simpler and shorter way.

  <ul class="nav">
    <li <?php if ($_GET['pg'] == "PAGE1") { echo "class="active""; } ?>><a href="?pg=PAGE1">FIRST PAGE</a></li>
    <li <?php if ($_GET['pg'] == "PAGE2") { echo "class="active""; } ?>><a href="?pg=PAGE2">SECOND PAGE</a></li>
  </ul>
  

  推荐答案

  <?php
      $pages = array(
          'PAGE1' => 'FIRST PAGE',
          'PAGE2' => 'SECOND PAGE');
  ?>
  
  <ul class="nav">
    <?php foreach ($pages as $pageId => $pageTitle): ?>
    <li <?=(($_GET['pg'] == $pageId) ? 'class="active"' : '')?>><a href="?pg=<?=$pageId?>"><?=$pageTitle?></a></li>
    <?php endforeach; ?>
  </ul>
  

  http://php.net/manual/en/control-structures.foreach.php

  不要重复自己——两个 li-s 非常相似，唯一的区别是页面 ID 和标题.一旦您拥有两个以上的页面，这种方法将非常有用.

  Don't repeat yourself -- both li-s are very similar, the only difference is in page ID and title. This approach will really help once you have more than two pages.

  尽量将 PHP 和 HTML 分开——一旦您决定将它们保存在单独的文件中(有时您会这样做)，这将使您的生活更轻松.

  Try to keep PHP and HTML as separate as possible -- this will make your life easier once you decide to keep them in separate files (and you will sometimes).