WP: Wie man eine Klasse (PHP-Datei) in functions.php einbindet, anstatt sie als (lange) Funktion in functions.php zu schreiben

Question

Ich versuche, meinem WP-Thema eine Breadcrumbs-Funktion hinzuzufügen (bitte ohne Plugins)).

ich dieses Tutorial bin nach was ziemlich gut funktioniert: https://www.thewebtaylor.com/articles/wordpress-creating-breadcrumbs-without-a-plugin

Statt es zu meinem functions.php kopieren, wie es jetzt ist, habe ich beschlossen, es wird eine bessere Praxis sei es von außen zu schließen, wie ich mit tat " walker.php ": http://simonpadbury.github.io/2016/03/09/bootstrap-4-navbar-with-dropdowns-for-wordpress.html - hier ist ein Video-Tutorial, wenn jemand Interesse geweckt wird: Part1 & Part2

Wie mache ich das richtig? Diese

ist, wie ich bin auch die Klasse in functions.php:

/* 
    =============== 
    Add Breadcrumbs 
    =============== 
*/ 
require get_template_directory() . '/inc/breadcrumbs.php'; 

Das ist mein /inc/breadcrumbs.php Datei:

<?php 


class Breadcrumbs { 

    // Settings 
    $separator   = '&gt;'; 
    $breadcrums_id  = 'breadcrumbs'; 
    $breadcrums_class = 'breadcrumbs'; 
    $home_title   = 'Homepage'; 

    // If you have any custom post types with custom taxonomies, put the taxonomy name below (e.g. product_cat) 
    $custom_taxonomy = 'product_cat'; 

    // Get the query & post information 
    global $post,$wp_query; 

    // Do not display on the homepage 
    if (!is_front_page()) { 

     // Build the breadcrums 
     echo '<ul id="' . $breadcrums_id . '" class="' . $breadcrums_class . '">'; 

     // Home page 
     echo '<li class="item-home"><a class="bread-link bread-home" href="' . get_home_url() . '" title="' . $home_title . '">' . $home_title . '</a></li>'; 
     echo '<li class="separator separator-home"> ' . $separator . ' </li>'; 

     if (is_archive() && !is_tax() && !is_category() && !is_tag()) { 

      echo '<li class="item-current item-archive"><strong class="bread-current bread-archive">' . post_type_archive_title($prefix, false) . '</strong></li>'; 

     } else if (is_archive() && is_tax() && !is_category() && !is_tag()) { 

      // If post is a custom post type 
      $post_type = get_post_type(); 

      // If it is a custom post type display name and link 
      if($post_type != 'post') { 

       $post_type_object = get_post_type_object($post_type); 
       $post_type_archive = get_post_type_archive_link($post_type); 

       echo '<li class="item-cat item-custom-post-type-' . $post_type . '"><a class="bread-cat bread-custom-post-type-' . $post_type . '" href="' . $post_type_archive . '" title="' . $post_type_object->labels->name . '">' . $post_type_object->labels->name . '</a></li>'; 
       echo '<li class="separator"> ' . $separator . ' </li>'; 

      } 

      $custom_tax_name = get_queried_object()->name; 
      echo '<li class="item-current item-archive"><strong class="bread-current bread-archive">' . $custom_tax_name . '</strong></li>'; 

     } else if (is_single()) { 

      // If post is a custom post type 
      $post_type = get_post_type(); 

      // If it is a custom post type display name and link 
      if($post_type != 'post') { 

       $post_type_object = get_post_type_object($post_type); 
       $post_type_archive = get_post_type_archive_link($post_type); 

       echo '<li class="item-cat item-custom-post-type-' . $post_type . '"><a class="bread-cat bread-custom-post-type-' . $post_type . '" href="' . $post_type_archive . '" title="' . $post_type_object->labels->name . '">' . $post_type_object->labels->name . '</a></li>'; 
       echo '<li class="separator"> ' . $separator . ' </li>'; 

      } 

      // Get post category info 
      $category = get_the_category(); 

      if(!empty($category)) { 

       // Get last category post is in 
       $last_category = end(array_values($category)); 

       // Get parent any categories and create array 
       $get_cat_parents = rtrim(get_category_parents($last_category->term_id, true, ','),','); 
       $cat_parents = explode(',',$get_cat_parents); 

       // Loop through parent categories and store in variable $cat_display 
       $cat_display = ''; 
       foreach($cat_parents as $parents) { 
        $cat_display .= '<li class="item-cat">'.$parents.'</li>'; 
        $cat_display .= '<li class="separator"> ' . $separator . ' </li>'; 
       } 

      } 

      // If it's a custom post type within a custom taxonomy 
      $taxonomy_exists = taxonomy_exists($custom_taxonomy); 
      if(empty($last_category) && !empty($custom_taxonomy) && $taxonomy_exists) { 

       $taxonomy_terms = get_the_terms($post->ID, $custom_taxonomy); 
       $cat_id   = $taxonomy_terms[0]->term_id; 
       $cat_nicename = $taxonomy_terms[0]->slug; 
       $cat_link  = get_term_link($taxonomy_terms[0]->term_id, $custom_taxonomy); 
       $cat_name  = $taxonomy_terms[0]->name; 

      } 

      // Check if the post is in a category 
      if(!empty($last_category)) { 
       echo $cat_display; 
       echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '" title="' . get_the_title() . '">' . get_the_title() . '</strong></li>'; 

      // Else if post is in a custom taxonomy 
      } else if(!empty($cat_id)) { 

       echo '<li class="item-cat item-cat-' . $cat_id . ' item-cat-' . $cat_nicename . '"><a class="bread-cat bread-cat-' . $cat_id . ' bread-cat-' . $cat_nicename . '" href="' . $cat_link . '" title="' . $cat_name . '">' . $cat_name . '</a></li>'; 
       echo '<li class="separator"> ' . $separator . ' </li>'; 
       echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '" title="' . get_the_title() . '">' . get_the_title() . '</strong></li>'; 

      } else { 

       echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '" title="' . get_the_title() . '">' . get_the_title() . '</strong></li>'; 

      } 

     } else if (is_category()) { 

      // Category page 
      echo '<li class="item-current item-cat"><strong class="bread-current bread-cat">' . single_cat_title('', false) . '</strong></li>'; 

     } else if (is_page()) { 

      // Standard page 
      if($post->post_parent){ 

       // If child page, get parents 
       $anc = get_post_ancestors($post->ID); 

       // Get parents in the right order 
       $anc = array_reverse($anc); 

       // Parent page loop 
       if (!isset($parents)) $parents = null; 
       foreach ($anc as $ancestor) { 
        $parents .= '<li class="item-parent item-parent-' . $ancestor . '"><a class="bread-parent bread-parent-' . $ancestor . '" href="' . get_permalink($ancestor) . '" title="' . get_the_title($ancestor) . '">' . get_the_title($ancestor) . '</a></li>'; 
        $parents .= '<li class="separator separator-' . $ancestor . '"> ' . $separator . ' </li>'; 
       } 

       // Display parent pages 
       echo $parents; 

       // Current page 
       echo '<li class="item-current item-' . $post->ID . '"><strong title="' . get_the_title() . '"> ' . get_the_title() . '</strong></li>'; 

      } else { 

       // Just display current page if not parents 
       echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '"> ' . get_the_title() . '</strong></li>'; 

      } 

     } else if (is_tag()) { 

      // Tag page 

      // Get tag information 
      $term_id  = get_query_var('tag_id'); 
      $taxonomy  = 'post_tag'; 
      $args   = 'include=' . $term_id; 
      $terms   = get_terms($taxonomy, $args); 
      $get_term_id = $terms[0]->term_id; 
      $get_term_slug = $terms[0]->slug; 
      $get_term_name = $terms[0]->name; 

      // Display the tag name 
      echo '<li class="item-current item-tag-' . $get_term_id . ' item-tag-' . $get_term_slug . '"><strong class="bread-current bread-tag-' . $get_term_id . ' bread-tag-' . $get_term_slug . '">' . $get_term_name . '</strong></li>'; 

     } elseif (is_day()) { 

      // Day archive 

      // Year link 
      echo '<li class="item-year item-year-' . get_the_time('Y') . '"><a class="bread-year bread-year-' . get_the_time('Y') . '" href="' . get_year_link(get_the_time('Y')) . '" title="' . get_the_time('Y') . '">' . get_the_time('Y') . ' Archives</a></li>'; 
      echo '<li class="separator separator-' . get_the_time('Y') . '"> ' . $separator . ' </li>'; 

      // Month link 
      echo '<li class="item-month item-month-' . get_the_time('m') . '"><a class="bread-month bread-month-' . get_the_time('m') . '" href="' . get_month_link(get_the_time('Y'), get_the_time('m')) . '" title="' . get_the_time('M') . '">' . get_the_time('M') . ' Archives</a></li>'; 
      echo '<li class="separator separator-' . get_the_time('m') . '"> ' . $separator . ' </li>'; 

      // Day display 
      echo '<li class="item-current item-' . get_the_time('j') . '"><strong class="bread-current bread-' . get_the_time('j') . '"> ' . get_the_time('jS') . ' ' . get_the_time('M') . ' Archives</strong></li>'; 

     } else if (is_month()) { 

      // Month Archive 

      // Year link 
      echo '<li class="item-year item-year-' . get_the_time('Y') . '"><a class="bread-year bread-year-' . get_the_time('Y') . '" href="' . get_year_link(get_the_time('Y')) . '" title="' . get_the_time('Y') . '">' . get_the_time('Y') . ' Archives</a></li>'; 
      echo '<li class="separator separator-' . get_the_time('Y') . '"> ' . $separator . ' </li>'; 

      // Month display 
      echo '<li class="item-month item-month-' . get_the_time('m') . '"><strong class="bread-month bread-month-' . get_the_time('m') . '" title="' . get_the_time('M') . '">' . get_the_time('M') . ' Archives</strong></li>'; 

     } else if (is_year()) { 

      // Display year archive 
      echo '<li class="item-current item-current-' . get_the_time('Y') . '"><strong class="bread-current bread-current-' . get_the_time('Y') . '" title="' . get_the_time('Y') . '">' . get_the_time('Y') . ' Archives</strong></li>'; 

     } else if (is_author()) { 

      // Auhor archive 

      // Get the author information 
      global $author; 
      $userdata = get_userdata($author); 

      // Display author name 
      echo '<li class="item-current item-current-' . $userdata->user_nicename . '"><strong class="bread-current bread-current-' . $userdata->user_nicename . '" title="' . $userdata->display_name . '">' . 'Author: ' . $userdata->display_name . '</strong></li>'; 

     } else if (get_query_var('paged')) { 

      // Paginated archives 
      echo '<li class="item-current item-current-' . get_query_var('paged') . '"><strong class="bread-current bread-current-' . get_query_var('paged') . '" title="Page ' . get_query_var('paged') . '">'.__('Page') . ' ' . get_query_var('paged') . '</strong></li>'; 

     } else if (is_search()) { 

      // Search results page 
      echo '<li class="item-current item-current-' . get_search_query() . '"><strong class="bread-current bread-current-' . get_search_query() . '" title="Search results for: ' . get_search_query() . '">Search results for: ' . get_search_query() . '</strong></li>'; 

     } elseif (is_404()) { 

      // 404 page 
      echo '<li>' . 'Error 404' . '</li>'; 
     } 

     echo '</ul>'; 

    } 


} 

Answer 1

Die gehören sollte Recht. Die Datei geht in <Theme-dir>/inc/ und Sie enthalten diese require. Sie sollten require_once verwenden, aber das ist nicht der Punkt für Ihr Problem. Ich denke, Sie sollten die Klasse und seine Methode verwenden, um die Brotkrume in die Vorlagen aufzunehmen. Derzeit schließt du die Klasse ein, aber du verwendest keine Ausgabe, eine Methode dieser Klasse.

Wenn ich Ihren Code lese, so ist es keine Klasse, es sollte eine Funktion, wie das, wie das Tutorial Ihrer Referenz. Die class Breadcrunmp { ist falsch, sollte function Breadcrumbs() { sein Dann können Sie diese Funktion in Ihre Vorlagendatei, wie die footer.php Ihres Themas einschließen.

Auch ein Hinweis, aus Tausenden von Hinweisen, sollten Sie ein Präfix für die Funktion verwenden, so dass Sie keine Fehler mit Funktionen erhalten, haben sie den gleichen Namen, manchmal von einem Plugin.