PHP Navbar活动类

Question

这是我的导航菜单的布局。它工作得很好，因为它应该。但我想要

<li class="active"> 

在当前处于活动状态的页面上。我怎样才能做到这一点？

home.php：

<?php include 'includes/navbar.php'; ?>  

navbar.php：

<li><a href="?page=home">Home</a></li> 
<li><a href="?page=about">About</a></li> 
//etc 

的index.php：

$page = $_GET['page']; 
if (!isset($page)) { 
    include('home.php.php'); 
} 
if ($page == "home") { 
    include('home.php.php'); 
} 
if ($page == "about") { 
    include('about.php'); 
} 
//etc 

Answer 1

你可以写一个if语句的每一个环节，但是这是一个更整洁的方法。

navbar.php

<?php 

// using home as default, and not throwing a notice when $_GET['page'] isn't set 
$page = (isset($_GET['page'])? $_GET['page'] : 'home'); 

// create an array of pages and their titles 
$pages = array(
    'home' => 'Home', 
    'about' => 'About', 
    // etc 
); 

// output each, checking for which is active 
foreach ($pages as $pagestring => $text){ 
    $active = ($pagestring == $page? ' class="active"' : ''); 
    echo '<li' . $active . '><a href="?page=' . $pagestring . '">' . $text . '</a></li>'; 
} 

?> 

如果某些页面出现的下拉列表（在问题未画出）一点点更多的工作需要做......这个NB包装整个事情与<ul>它没有按” t似乎在你的navbar.php文件中。

$currentpage = (isset($_GET['page'])? $_GET['page'] : 'home'); 

$pages = array(
    'home' => 'Home', // just use a string for a simple link 
    'about' => 'About', 
    'cute' => array(// use an array for a dropdown 
     'text' => 'Cute things', 
     'children' => array(
      'kittens' => 'Kittens', 
      'puppies' => 'Puppies', 
     ) 
    ), 
    // etc, you can include children in children too 
); 

echo createLinksRecursive($pages, $currentpage); 

function createLinksRecursive($array, $currentpage){ 
    $return = '<ul>'; 
    foreach ($array as $pagestring => $linkarray){ 
     // we don't want to worry about whether it's a string or array more than once 
     if (!is_array($linkarray)) $linkarray = array('text' => $linkarray); 

     // check for active 
     $active = ($pagestring == $currentpage? ' class="active"' : ''); 

     // add the li and anchor element 
     $return .= '<li' . $active . '> 
      <a href="?page=' . $pagestring . '">' . $linkarray['text'] . '</a>'; 

     // add children if there are any using the same function 
     if (isset($linkarray['children'])){ 
      $return .= createLinksRecursive($linkarray['children'], $currentpage); 
     } 

     // close that li 
     $return .= '</li>'; 
    }  

    // close the ul and return 
    $return .= '</ul>'; 
    return $return; 
}