2019添加WordPress面包屑（Breadcrumbs）导航代码

发表于 2019年06月14日
WordPress

你在寻找一种方法来添加面包屑导航并在WordPress中显示它们吗？我们这有代码片段能实现，你可以使用它在WordPress中添加面包屑（Breadcrumbs）。

将此代码添加到主题的functions.php文件：

function dimox_breadcrumbs() {
  
  $delimiter = '»';
  $name = 'Home'; //text for the 'Home' link
  $currentBefore = '<span class="current">';
  $currentAfter = '</span>';
  
  if ( !is_home() && !is_front_page() || is_paged() ) {
  
    echo '<div id="crumbs">';
  
    global $post;
    $home = get_bloginfo('url');
    echo '<a href="' . $home . '">' . $name . '</a> ' . $delimiter . ' ';
  
    if ( is_category() ) {
      global $wp_query;
      $cat_obj = $wp_query->get_queried_object();
      $thisCat = $cat_obj->term_id;
      $thisCat = get_category($thisCat);
      $parentCat = get_category($thisCat->parent);
      if ($thisCat->parent != 0) echo(get_category_parents($parentCat, TRUE, ' ' . $delimiter . ' '));
      echo $currentBefore . 'Archive by category '';
      single_cat_title();
      echo ''' . $currentAfter;
  
    } elseif ( is_day() ) {
      echo '<a href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';
      echo '<a href="' . get_month_link(get_the_time('Y'),get_the_time('m')) . '">' . get_the_time('F') . '</a> ' . $delimiter . ' ';
      echo $currentBefore . get_the_time('d') . $currentAfter;
  
    } elseif ( is_month() ) {
      echo '<a href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';
      echo $currentBefore . get_the_time('F') . $currentAfter;
  
    } elseif ( is_year() ) {
      echo $currentBefore . get_the_time('Y') . $currentAfter;
  
    } elseif ( is_single() && !is_attachment() ) {
      $cat = get_the_category(); $cat = $cat[0];
      echo get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');
      echo $currentBefore;
      the_title();
      echo $currentAfter;
  
    } elseif ( is_attachment() ) {
      $parent = get_post($post->post_parent);
      $cat = get_the_category($parent->ID); $cat = $cat[0];
      echo get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');
      echo '<a href="' . get_permalink($parent) . '">' . $parent->post_title . '</a> ' . $delimiter . ' ';
      echo $currentBefore;
      the_title();
      echo $currentAfter;
  
    } elseif ( is_page() && !$post->post_parent ) {
      echo $currentBefore;
      the_title();
      echo $currentAfter;
  
    } elseif ( is_page() && $post->post_parent ) {
      $parent_id  = $post->post_parent;
      $breadcrumbs = array();
      while ($parent_id) {
        $page = get_page($parent_id);
        $breadcrumbs[] = '<a href="' . get_permalink($page->ID) . '">' . get_the_title($page->ID) . '</a>';
        $parent_id  = $page->post_parent;
      }
      $breadcrumbs = array_reverse($breadcrumbs);
      foreach ($breadcrumbs as $crumb) echo $crumb . ' ' . $delimiter . ' ';
      echo $currentBefore;
      the_title();
      echo $currentAfter;
  
    } elseif ( is_search() ) {
      echo $currentBefore . 'Search results for '' . get_search_query() . ''' . $currentAfter;
  
    } elseif ( is_tag() ) {
      echo $currentBefore . 'Posts tagged '';
      single_tag_title();
      echo ''' . $currentAfter;
  
    } elseif ( is_author() ) {
       global $author;
      $userdata = get_userdata($author);
      echo $currentBefore . 'Articles posted by ' . $userdata->display_name . $currentAfter;
  
    } elseif ( is_404() ) {
      echo $currentBefore . 'Error 404' . $currentAfter;
    }
  
    if ( get_query_var('paged') ) {
      if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ' (';
      echo __('Page') . ' ' . get_query_var('paged');
      if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ')';
    }
  
    echo '</div>';
  
  }
}

100

function dimox_breadcrumbs() {

$delimiter = '»';

$name = 'Home'; //text for the 'Home' link

$currentBefore = '<span class="current">';

$currentAfter = '</span>';

if ( !is_home() && !is_front_page() || is_paged() ) {

echo '<div id="crumbs">';

global $post;

$home = get_bloginfo('url');

echo '<a href="' . $home . '">' . $name . '</a> ' . $delimiter . ' ';

if ( is_category() ) {

global $wp_query;

$cat_obj = $wp_query->get_queried_object();

$thisCat = $cat_obj->term_id;

$thisCat = get_category($thisCat);

$parentCat = get_category($thisCat->parent);

if ($thisCat->parent != 0) echo(get_category_parents($parentCat, TRUE, ' ' . $delimiter . ' '));

echo $currentBefore . 'Archive by category '';

single_cat_title();

echo ''' . $currentAfter;

} elseif ( is_day() ) {

echo '<a href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';

echo '<a href="' . get_month_link(get_the_time('Y'),get_the_time('m')) . '">' . get_the_time('F') . '</a> ' . $delimiter . ' ';

echo $currentBefore . get_the_time('d') . $currentAfter;

} elseif ( is_month() ) {

echo '<a href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';

echo $currentBefore . get_the_time('F') . $currentAfter;

} elseif ( is_year() ) {

echo $currentBefore . get_the_time('Y') . $currentAfter;

} elseif ( is_single() && !is_attachment() ) {

$cat = get_the_category(); $cat = $cat[0];

echo get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');

echo $currentBefore;

the_title();

echo $currentAfter;

} elseif ( is_attachment() ) {

$parent = get_post($post->post_parent);

$cat = get_the_category($parent->ID); $cat = $cat[0];

echo get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');

echo '<a href="' . get_permalink($parent) . '">' . $parent->post_title . '</a> ' . $delimiter . ' ';

echo $currentBefore;

the_title();

echo $currentAfter;

} elseif ( is_page() && !$post->post_parent ) {

echo $currentBefore;

the_title();

echo $currentAfter;

} elseif ( is_page() && $post->post_parent ) {

$parent_id = $post->post_parent;

$breadcrumbs = array();

while ($parent_id) {

$page = get_page($parent_id);

$breadcrumbs[] = '<a href="' . get_permalink($page->ID) . '">' . get_the_title($page->ID) . '</a>';

$parent_id = $page->post_parent;

}

$breadcrumbs = array_reverse($breadcrumbs);

foreach ($breadcrumbs as $crumb) echo $crumb . ' ' . $delimiter . ' ';

echo $currentBefore;

the_title();

echo $currentAfter;

} elseif ( is_search() ) {

echo $currentBefore . 'Search results for '' . get_search_query() . ''' . $currentAfter;

} elseif ( is_tag() ) {

echo $currentBefore . 'Posts tagged '';

single_tag_title();

echo ''' . $currentAfter;

} elseif ( is_author() ) {

global $author;

$userdata = get_userdata($author);

echo $currentBefore . 'Articles posted by ' . $userdata->display_name . $currentAfter;

} elseif ( is_404() ) {

echo $currentBefore . 'Error 404' . $currentAfter;

}

if ( get_query_var('paged') ) {

if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ' (';

echo __('Page') . ' ' . get_query_var('paged');

if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ')';

}

echo '</div>';

}

将此代码添加到主题的模板文件中（比如single.php），要显示面包屑导航的位置：

<?php 
           if (function_exists('dimox_breadcrumbs')) dimox_breadcrumbs(); 
?>

<?php

if (function_exists('dimox_breadcrumbs')) dimox_breadcrumbs();

或者，你可以使用这个更简短的代码段。将此代码添加到主题的functions.php文件中：

function the_breadcrumb() {
        echo '<ul id="crumbs">';
    if (!is_home()) {
        echo '<li><a href="';
        echo get_option('home');
        echo '">';
        echo 'Home';
        echo "</a></li>";
        if (is_category() || is_single()) {
            echo '<li>';
            the_category(' </li><li> ');
            if (is_single()) {
                echo "</li><li>";
                the_title();
                echo '</li>';
            }
        } elseif (is_page()) {
            echo '<li>';
            echo the_title();
            echo '</li>';
        }
    }
    elseif (is_tag()) {single_tag_title();}
    elseif (is_day()) {echo"<li>Archive for "; the_time('F jS, Y'); echo'</li>';}
    elseif (is_month()) {echo"<li>Archive for "; the_time('F, Y'); echo'</li>';}
    elseif (is_year()) {echo"<li>Archive for "; the_time('Y'); echo'</li>';}
    elseif (is_author()) {echo"<li>Author Archive"; echo'</li>';}
    elseif (isset($_GET['paged']) && !empty($_GET['paged'])) {echo "<li>Blog Archives"; echo'</li>';}
    elseif (is_search()) {echo"<li>Search Results"; echo'</li>';}
    echo '</ul>';
}