致命错误：未找到“Walker_Nav_Primary”类

问题描述：

I am trying to change the markup for the nav on my site and I am pretty new to developing wordpress, but I am having issues getting it to display my Walker class. I am attempting to reconfigure the 2017 theme that comes with Wordpress. But I keep getting this error that says "Fatal error: Class 'Walker_Nav_Primary' not found in /wp-content/themes/Vibe/header.php on line 56" This is what the class looks like:

<?php
  class Walker_Nav_Primary extends Walker_Nav_menu {

    function start_lvl( &$output, $depth = 0, $args = array() ){ //ul
        $indent = str_repeat("\t",$depth);
        $submenu = ($depth > 0) ? ' sub-menu' : '';
        $output .= "
$indent<ul class=\"dropdown-menu$submenu depth_$depth\">
";
    }
    /*  
    function start_el( ){ //li a span
    }
    function end_el(){ // closing li a span
    }

    function end_lvl(){ // closing ul

    }
    */
     }

And the portion of my header file where I am calling it:

<?php wp_nav_menu( array(
    'theme_location' => 'top',
    'menu_id'        => 'primary-menu',
    'menu_class'        => 'head-menu',
    'walker'            =>  new Walker_Nav_Primary(),
) ); ?>

EDIT:

// This theme uses wp_nav_menu() in two locations.
register_nav_menus( array(
    'top'    => __( 'Top Menu', 'twentyseventeen' ),
    'social' => __( 'Social Links Menu', 'twentyseventeen' ),
) );

我正在尝试更改我网站上导航的标记，而且我是开发wordpress的新手，但是我我有问题让它显示我的沃克课程。我正在尝试重新配置Wordpress附带的2017主题。但是我一直收到这样的错误，上面写着“致命的错误：Class'Walker_Nav_Primary'在第56行的/wp-content/themes/Vibe/header.php中找不到”这就是这个类的样子： p> \ n

 ＆lt;？php 
 class Walker_Nav_Primary扩展了Walker_Nav_menu {
 
函数start_lvl（＆amp; $ output，$ depth = 0，$ args = array（））{// ul 
 $ indent  = str_repeat（“\ t”，$ depth）; 
 $ submenu =（$ depth＆gt; 0）？  '子菜单'：''; 
 $ output。=“
 $ indent＆lt; ul class = \”dropdown-menu $ submenu depth_ $ depth \“＆gt; 
”; 
} 
 / * \  n function start_el（）{// li a span 
} 
 function end_el（）{// close li a span 
} 
 
函数end_lvl（）{//关闭ul 
 
} 
  * / 
} 
  code>  pre> 
 
 我的头文件中我称之为的部分： p> 
 
 
 ＆lt  ;？php wp_nav_menu（array（
'theme_location'=＆gt;'top'，
'menu_id'=＆gt;'primary-menu'，
'menu_class'=＆gt;'head-menu'，
'  walker'=＆gt; new Walker_Nav_Primary（），
））;  ？＆gt; 
  code>  pre> 
 
 编辑： p> 
 
 
  //此主题在两个位置使用wp_nav_menu（）。
register_nav_menus  （数组（
'top'=＆gt; __（'Top Menu'，'twentyseventeen'），
'ocialical'=＆gt; __（'Social Links Menu'，'twentyseventeen'），
））; \  n  code>  pre> 
  div>

答

Put his in your functions.php file

// Register Custom Navigation Walker
require_once get_template_directory() . '/walker-fie-name.php';

Try this and reply if any issue.

In your case, it should be

require_once get_template_directory() . '/inc/walker.php';

Update you walker.php file with this code

<?php
if ( ! class_exists( 'Walker_Nav_Primary' ) ) {
  class Walker_Nav_Primary extends Walker_Nav_menu {

    public function start_lvl( &$output, $depth = 0, $args = array() ){ //ul
        $indent = str_repeat("\t",$depth);
        $submenu = ($depth > 0) ? ' sub-menu' : '';
        $output .= "
$indent<ul class=\"dropdown-menu$submenu depth_$depth\">
";
    }
}

Put in function.php file at very top

Replace

require_once get_template_directory() . '/inc/walker.php';

With this code.

if ( ! file_exists( get_template_directory() . '/inc/walker.php' ) ) {
    // file does not exist... return an empty page with msg not found
    wp_die('Not found');
} else {
    // file exists... require it.
    require_once get_template_directory() . '/inc/walker.php';
}

答

Maybe require works , in header php file

require_once('xxx/xxx/Walker_Nav_Primary.php');

答

I think you should change this code!

<?php wp_nav_menu( array(
'theme_location' => 'top',
'menu_id'        => 'primary-menu',
'menu_class'        => 'head-menu',
'walker'            =>  new Walker_Nav_Primary(),) ); ?>

to this:

    <?php 
$walker = new Walker_Nav_Primary;
wp_nav_menu( array(
    'theme_location' => 'top',
    'menu_id'        => 'primary-menu',
    'menu_class'        => 'head-menu',
    'walker'            =>  $walker,) ); ?>

致命错误：未找到“Walker_Nav_Primary”类

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