WP面包屑导航函数

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第一层设置$breadcrumbs[] 通过$breadcrumbs[] 无限给$breadcrumbs 添加数组进去 最后打印的时候 打印出来

$breadcrumbs[] 使用一次就是array_push一次

<?php
/**
 * Breadcrumbs function
 *
 */

defined( 'ABSPATH' ) || exit; // Exit if accessed directly


if( ! function_exists( 'tie_breadcrumbs' )){

  function tie_breadcrumbs(){

    // If the breadcrumbs is disabled OR is hidden on mobiles
    if( ! tie_get_option( 'breadcrumbs' ) ){
      return;
    }

    // breadcrumbs
    $delimiter   = tie_get_option( 'breadcrumbs_delimiter' ) ? wp_kses_post( tie_get_option( 'breadcrumbs_delimiter' ) ) : '&raquo;';
    $delimiter   = '<span class="delimiter">'. $delimiter .'</span>';
    $home_icon   = '<span class="fa fa-home" aria-hidden="true"></span>';
    $home_text   =  __ti( '首页' );
    $before      = '<li class="active">';
    $after       = '</li>';
    $breadcrumbs = array();

    // bbPress breadcrumbs
    if( function_exists( 'is_bbpress' ) && is_bbpress() && ( ! function_exists( 'is_buddypress' ) || ( function_exists( 'is_buddypress' ) && ! is_buddypress() ))){

      add_filter( 'bbp_no_breadcrumb', '__return_false' );

      $args = array(
        'before'         => '<nav id="crumbs" class="bbp-breadcrumb">',
        'after'          => '</nav>',
        'sep'            => $delimiter,
        'sep_before'     => '',
        'sep_after'      => '',
        'home_text'      => $home_icon.' '.$home_text,
        'current_before' => $before,
        'current_after'  => $after,
      );

      echo bbp_get_breadcrumb( $args );
    } 

    // WordPress breadcrumbs
    elseif ( ! is_front_page() || is_paged() ){

      $post     = get_post();
      $home_url = esc_url(home_url( '/' ));

      // Home
      $breadcrumbs[] = array(
        'url'   => $home_url,
        'name'  => $home_text,
        'icon'  => $home_icon,
      );
      if (is_home()) {
        $breadcrumbs[] = array(
        
        'name'  => '新闻中心'
        
      );
      }

      // Category
      elseif ( is_category() ){

        $category = get_query_var( 'cat' );
        $category = get_category( $category );

        if( $category->parent !== 0 ){
          //if category has parent 

          $parent_categories = array_reverse( get_ancestors( $category->cat_ID, 'category' ) );

          foreach ( $parent_categories as $parent_category ) {
            $breadcrumbs[] = array(
              'url'  => get_category_link( $parent_category ),
              'name' => get_cat_name( $parent_category ),
            );
          }
        }

        $breadcrumbs[] = array(
          'name' => get_cat_name( $category->cat_ID ),
        );
      }
      // Day
      elseif ( is_day() ){

        $breadcrumbs[] = array(
          'url'  => get_year_link( get_the_time( 'Y' ) ),
          'name' => get_the_time( 'Y' ),
        );

        $breadcrumbs[] = array(
          'url'  => get_month_link( get_the_time( 'Y' ), get_the_time( 'm' ) ),
          'name' => get_the_time( 'F' ),
        );

        $breadcrumbs[] = array(
          'name' => get_the_time( 'd' ),
        );
      }

      // Month
      elseif ( is_month() ){

        $breadcrumbs[] = array(
          'url'  => get_year_link( get_the_time( 'Y' ) ),
          'name' => get_the_time( 'Y' ),
        );

        $breadcrumbs[] = array(
          'name' => get_the_time( 'F' ),
        );
      }

      // Year
      elseif ( is_year() ){

        $breadcrumbs[] = array(
          'name' => get_the_time( 'Y' ),
        );
      }

      // Tag
      elseif ( is_tag() ){

        $breadcrumbs[] = array(
          'name' => get_the_archive_title(),
        );
      }

      // Author
      elseif ( is_author() ){

        $author = get_queried_object();

        $breadcrumbs[] = array(
          'name' => $author->display_name,
        );
      }

      // Search
      elseif ( is_search() ){

        $breadcrumbs[] = array(
          'name' => sprintf( __ti( 'Search Results for: %s' ),  get_search_query() ),
        );
      }

      // 404
      elseif ( is_404() ){

        $breadcrumbs[] = array(
          'name' => __ti( 'No Results' ),
        );
      }

      // BuddyPress
      elseif ( function_exists('bp_current_component') && bp_current_component() ){

        $breadcrumbs[] = array(
          'name' => get_the_title(),
        );
      }

      // Pages
      elseif ( is_page() ){

        if ( $post->post_parent ){

          $parent_id   = $post->post_parent;
          $page_parents = array();

          while ( $parent_id ){
            $get_page  = get_page( $parent_id );
            $parent_id = $get_page->post_parent;

            $page_parents[] = array(
              'url'  => get_permalink( $get_page->ID ),
              'name' => get_the_title( $get_page->ID ),
            );
          }

          $page_parents = array_reverse( $page_parents );

          foreach( $page_parents as $single_page ){

            $breadcrumbs[] = array(
              'url'  => $single_page['url'],
              'name' => $single_page['name'],
            );
          }
        }

        $breadcrumbs[] = array(
          'name' => get_the_title(),
        );
      }
      elseif(is_post_type_archive(  )) {
        // Get the main Post type archive link
          if( $archive_link = get_post_type_archive_link( get_post_type() ) ){

            $post_type = get_post_type_object( get_post_type() );

            $breadcrumbs[] = array(
              
              'name' => $post_type->labels->singular_name,
            );
          }
      }

      // Attachment
      elseif ( is_attachment() ){

        if( ! empty( $post->post_parent ) ){
          $parent = get_post( $post->post_parent );

          $breadcrumbs[] = array(
            'url'  => get_permalink( $parent ),
            'name' => $parent->post_title,
          );
        }

        $breadcrumbs[] = array(
          'name' => get_the_title(),
        );
      }

      elseif (is_tax()) {
        $tax = get_queried_object();
        
        if (get_post_type(  ) == 'product') {
          if ($tax->parent == 1) {
          $breadcrumbs[] = array(
            'url'  => get_permalink( $parent ),
            'name' => $parent->post_title,
          );
        } else {
          $breadcrumbs[] = array(
            'url'  => get_post_type_archive_link( get_post_type() ),
            'name' => '产品中心'
          ); }
        }
        $breadcrumbs[] = array(
          'name' => $tax->name,
        );
      }

      // Single Posts
      elseif ( is_singular() ){

        // Single Post
        if ( get_post_type() == 'post' ){

          $category = get_the_category();

          if( ! empty( $category ) ){

            $category = $category[0];

            if( $category->parent !== 0 ){
              $parent_categories = array_reverse( get_ancestors( $category->term_id, 'category' ) );

              foreach ( $parent_categories as $parent_category ) {
                $breadcrumbs[] = array(
                  'url'  => get_category_link( $parent_category ),
                  'name' => get_cat_name( $parent_category ),
                );
              }
            }

            $breadcrumbs[] = array(
              'url'  => get_category_link( $category->term_id ),
              'name' => get_cat_name( $category->term_id ),
            );
          }
        }

        // Custom Post Type
        else{

          // Get the main Post type archive link
          if( $archive_link = get_post_type_archive_link( get_post_type() ) ){

            $post_type = get_post_type_object( get_post_type() );

            $breadcrumbs[] = array(
              'url'  => $archive_link,
              'name' => $post_type->labels->singular_name,
            );
          }

          // Get custom Post Types taxonomies
          $taxonomies = get_object_taxonomies( $post, 'objects' );

          if( ! empty( $taxonomies ) && is_array( $taxonomies ) ){
            foreach( $taxonomies as $taxonomy ){
              if( $taxonomy->hierarchical ){
                $taxonomy_name = $taxonomy->name;
                break;
              }
            }
          }

          if( ! empty( $taxonomy_name ) ){
            $custom_terms = get_the_terms( $post, $taxonomy_name );

            if( ! empty( $custom_terms ) && ! is_wp_error( $custom_terms )){

              foreach ( $custom_terms as $term ){

                $breadcrumbs[] = array(
                  'url'  => get_term_link( $term ),
                  'name' => $term->name,
                );

                break;
              }
            }
          }
        }

        $breadcrumbs[] = array(
          'name' => get_the_title(),
        );
      }


      // --
      if ( get_query_var('paged') ) {

        if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ){
          $paged_text = ' ('. __ti('page' ) . ' ' . get_query_var('paged') . ')';

          end( $breadcrumbs );
          $key = key( $breadcrumbs );

          if( ! empty( $breadcrumbs[ $key ]['name'] ) ){
            $breadcrumbs[ $key ]['name'] .= $paged_text;
          }
        }
      }


      // Print the BreadCrumb
      if( ! empty( $breadcrumbs ) ){

        $counter = 0;
        $item_list_elements = array();
        $breadcrumbs_schema = array(
          '@context' => 'http://schema.org',
          '@type'    => 'BreadcrumbList',
          '@id'      => '#Breadcrumb',
        );

        echo '<div class="col-md-6 col-sm-6 col-xs-12"><ul class="bread-crumb clearfix">';
        
          foreach( $breadcrumbs as $item ) {

            $counter++;

            if( ! empty( $item['url'] )){
              $icon = ! empty( $item['icon'] ) ? $item['icon'] .' ' : '';
              echo '<li><a href="'. esc_url( $item['url'] ) .'">'. $item['name'] .'</a></li>';
            }
            else{
              echo ( $before . $item['name'] . $after );

              global $wp;
              $item['url'] = esc_url(home_url(add_query_arg(array(),$wp->request)));
            }

            $item_list_elements[] = array(
              '@type'    => 'ListItem',
              'position' => $counter,
              'item'     => array(
                'name' => str_replace( '<span class="fa fa-home" aria-hidden="true"></span> ', '', $item['name']),
                '@id'  => $item['url'],
              )
            );

          }

        echo '</ul></div>';

        if( tie_get_option( 'structure_data' ) ){

          // To remove the latest current element
          $latest_element = array_pop( $item_list_elements );

          if( ! empty( $item_list_elements ) && is_array( $item_list_elements ) ){

            $breadcrumbs_schema['itemListElement'] = $item_list_elements;
            echo '<script type="application/ld+json">'. wp_json_encode( $breadcrumbs_schema ) .'</script>';
          }
        }
      }
    }

    wp_reset_postdata();

  }

}

// WooCommerce Breadcrumb Args
add_filter( 'woocommerce_breadcrumb_defaults', 'tie_wc_breadcrumbs_args' );
function tie_wc_breadcrumbs_args(){
  return array(
    'delimiter'   => '<span class="delimiter">'. ( tie_get_option( 'breadcrumbs_delimiter') ? wp_kses_post( tie_get_option( 'breadcrumbs_delimiter') ) : '&raquo;' ) .'</span>',
    'wrap_before' => '<nav id="crumbs" class="woocommerce-breadcrumb" itemprop="breadcrumb">',
    'wrap_after'  => '</nav>',
    'home'        => ' '. __ti( 'Home' ),
    'before'      => '',
    'after'       => '',
  );
}

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