PHP 导航栏事件类

Question

这是我的导航菜单的布局。它工作得很好，正如它应该的那样。但我想要

 <li class="active">

在当前事件的页面上。我怎样才能实现这一目标？

home.php:

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

导航栏.php:

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

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

您可以为每个链接编写一个 if 语句，但这是一种更简洁的方法。

导航栏.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>';
}

?>

如果某些页面有下拉菜单(问题中未显示)，则需要做更多的工作...注意，这将整个事情包装为 <ul>这似乎不在您的 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;
}