魔扣科技

面包屑导航对于一个网站SEO来说还是挺重要的，可以使用以下代码来给自己的主题添加面包屑，将以下代码加入到主题的functions.php里：

1. function MBThemes_breadcrumbs() {
   
2. /* === OPTIONS === */
   
3. $text['home'] = '首页';
   
4. $text['category'] = '%s';
   
5. $text['search'] = '搜索结果：%s';
   
6. $text['tag'] = '标签：%s';
   
7. $text['author'] = '作者：%s';
   
8. $text['404'] = '404';
   
9. $text['page'] = '%s';
   
10. $text['cpage'] = '%s';
    
11. $wrap_before = '<div class="breadcrumbs">';
    
12. $wrap_after = '</div>';
    
13. $sep = '>';
    
14. $sep_before = '<span class="sep">';
    
15. $sep_after = '</span>';
    
16. $show_home_link = 1;
    
17. $show_on_home = 0;
    
18. $show_current = 1;
    
19. $before = '<span class="current">';
    
20. $after = '</span>';
    
21. /* === END OF OPTIONS === */
    
22. global $post;
    
23. $home_link = home_url('/');
    
24. $link_before = '<span itemscope itemtype="http://data-vocabulary.org/Breadcrumb">';
    
25. $link_after = '</span>';
    
26. $link_attr = ' itemprop="url"';
    
27. $link_in_before = '<span itemprop="title">';
    
28. $link_in_after = '</span>';
    
29. $link = $link_before . '<a href="%1$s"' . $link_attr . '>' . $link_in_before . '%2$s' . $link_in_after . '</a>' . $link_after;
    
30. $frontpage_id = get_option('page_on_front');
    
31. $parent_id = $post->post_parent;
    
32. $sep = ' ' . $sep_before . $sep . $sep_after . ' ';
    
33. if (is_home() || is_front_page()) {
    
34. if ($show_on_home) echo $wrap_before . '<a href="' . $home_link . '">' . $text['home'] . '</a>' . $wrap_after;
    
35. } else {
    
36. echo $wrap_before;
    
37. if ($show_home_link) echo sprintf($link, $home_link, $text['home']);
    
38. if ( is_category() ) {
    
39. $cat = get_category(get_query_var('cat'), false);
    
40. if ($cat->parent != 0) {
    
41. $cats = get_category_parents($cat->parent, TRUE, $sep);
    
42. $cats = preg_replace("#^(.+)$sep$#", "$1", $cats);
    
43. $cats = preg_replace('#<a([^>]+)>([^<]+)<\/a>#', $link_before . '<a$1' . $link_attr .'>' . $link_in_before . '$2' . $link_in_after .'</a>' . $link_after, $cats);
    
44. if ($show_home_link) echo $sep;
    
45. echo $cats;
    
46. }
    
47. if ( get_query_var('paged') ) {
    
48. $cat = $cat->cat_ID;
    
49. echo $sep . sprintf($link, get_category_link($cat), get_cat_name($cat)) . $sep . $before . sprintf($text['page'], get_query_var('paged')) . $after;
    
50. } else {
    
51. if ($show_current) echo $sep . $before . sprintf($text['category'], single_cat_title('', false)) . $after;
    
52. }
    
53. } elseif ( is_search() ) {
    
54. if (have_posts()) {
    
55. if ($show_home_link && $show_current) echo $sep;
    
56. if ($show_current) echo $before . sprintf($text['search'], get_search_query()) . $after;
    
57. } else {
    
58. if ($show_home_link) echo $sep;
    
59. echo $before . sprintf($text['search'], get_search_query()) . $after;
    
60. }
    
61. } elseif ( is_day() ) {
    
62. if ($show_home_link) echo $sep;
    
63. echo sprintf($link, get_year_link(get_the_time('Y')), get_the_time('Y')) . $sep;
    
64. echo sprintf($link, get_month_link(get_the_time('Y'), get_the_time('m')), get_the_time('F'));
    
65. if ($show_current) echo $sep . $before . get_the_time('d') . $after;
    
66. } elseif ( is_month() ) {
    
67. if ($show_home_link) echo $sep;
    
68. echo sprintf($link, get_year_link(get_the_time('Y')), get_the_time('Y'));
    
69. if ($show_current) echo $sep . $before . get_the_time('F') . $after;
    
70. } elseif ( is_year() ) {
    
71. if ($show_home_link && $show_current) echo $sep;
    
72. if ($show_current) echo $before . get_the_time('Y') . $after;
    
73. } elseif ( is_single() && !is_attachment() ) {
    
74. if ($show_home_link) echo $sep;
    
75. if ( get_post_type() != 'post' ) {
    
76. $post_type = get_post_type_object(get_post_type());
    
77. $slug = $post_type->rewrite;
    
78. printf($link, $home_link . '/' . $slug['slug'] . '/', $post_type->labels->singular_name);
    
79. if ($show_current) echo $sep . $before . get_the_title() . $after;
    
80. } else {
    
81. $cat = get_the_category(); $cat = $cat[0];
    
82. $cats = get_category_parents($cat, TRUE, $sep);
    
83. if (!$show_current || get_query_var('cpage')) $cats = preg_replace("#^(.+)$sep$#", "$1", $cats);
    
84. $cats = preg_replace('#<a([^>]+)>([^<]+)<\/a>#', $link_before . '<a$1' . $link_attr .'>' . $link_in_before . '$2' . $link_in_after .'</a>' . $link_after, $cats);
    
85. echo $cats;
    
86. if ( get_query_var('cpage') ) {
    
87. echo $sep . sprintf($link, get_permalink(), get_the_title()) . $sep . $before . sprintf($text['cpage'], get_query_var('cpage')) . $after;
    
88. } else {
    
89. if ($show_current) echo $before . get_the_title() . $after;
    
90. }
    
91. }
    
92. // custom post type
    
93. } elseif ( !is_single() && !is_page() && get_post_type() != 'post' && !is_404() ) {
    
94. $post_type = get_post_type_object(get_post_type());
    
95. if ( get_query_var('paged') ) {
    
96. echo $sep . sprintf($link, get_post_type_archive_link($post_type->name), $post_type->label) . $sep . $before . sprintf($text['page'], get_query_var('paged')) . $after;
    
97. } else {
    
98. if ($show_current) echo $sep . $before . $post_type->label . $after;
    
99. }
    
100. } elseif ( is_attachment() ) {
     
101. if ($show_home_link) echo $sep;
     
102. $parent = get_post($parent_id);
     
103. $cat = get_the_category($parent->ID); $cat = $cat[0];
     
104. if ($cat) {
     
105. $cats = get_category_parents($cat, TRUE, $sep);
     
106. $cats = preg_replace('#<a([^>]+)>([^<]+)<\/a>#', $link_before . '<a$1' . $link_attr .'>' . $link_in_before . '$2' . $link_in_after .'</a>' . $link_after, $cats);
     
107. echo $cats;
     
108. }
     
109. printf($link, get_permalink($parent), $parent->post_title);
     
110. if ($show_current) echo $sep . $before . get_the_title() . $after;
     
111. } elseif ( is_page() && !$parent_id ) {
     
112. if ($show_current) echo $sep . $before . get_the_title() . $after;
     
113. } elseif ( is_page() && $parent_id ) {
     
114. if ($show_home_link) echo $sep;
     
115. if ($parent_id != $frontpage_id) {
     
116. $breadcrumbs = array();
     
117. while ($parent_id) {
     
118. $page = get_page($parent_id);
     
119. if ($parent_id != $frontpage_id) {
     
120. $breadcrumbs[] = sprintf($link, get_permalink($page->ID), get_the_title($page->ID));
     
121. }
     
122. $parent_id = $page->post_parent;
     
123. }
     
124. $breadcrumbs = array_reverse($breadcrumbs);
     
125. for ($i = 0; $i < count($breadcrumbs); $i++) {
     
126. echo $breadcrumbs[$i];
     
127. if ($i != count($breadcrumbs)-1) echo $sep;
     
128. }
     
129. }
     
130. if ($show_current) echo $sep . $before . get_the_title() . $after;
     
131. } elseif ( is_tag() ) {
     
132. if ( get_query_var('paged') ) {
     
133. $tag_id = get_queried_object_id();
     
134. $tag = get_tag($tag_id);
     
135. echo $sep . sprintf($link, get_tag_link($tag_id), $tag->name) . $sep . $before . sprintf($text['page'], get_query_var('paged')) . $after;
     
136. } else {
     
137. if ($show_current) echo $sep . $before . sprintf($text['tag'], single_tag_title('', false)) . $after;
     
138. }
     
139. } elseif ( is_author() ) {
     
140. global $author;
     
141. $author = get_userdata($author);
     
142. if ( get_query_var('paged') ) {
     
143. if ($show_home_link) echo $sep;
     
144. echo sprintf($link, get_author_posts_url($author->ID), $author->display_name) . $sep . $before . sprintf($text['page'], get_query_var('paged')) . $after;
     
145. } else {
     
146. if ($show_home_link && $show_current) echo $sep;
     
147. if ($show_current) echo $before . sprintf($text['author'], $author->display_name) . $after;
     
148. }
     
149. } elseif ( is_404() ) {
     
150. if ($show_home_link && $show_current) echo $sep;
     
151. if ($show_current) echo $before . $text['404'] . $after;
     
152. } elseif ( has_post_format() && !is_singular() ) {
     
153. if ($show_home_link) echo $sep;
     
154. echo get_post_format_string( get_post_format() );
     
155. }
     
156. echo $wrap_after;
     
157. }
     
158. }

复制代码

然后在需要显示面包屑的地方加上以下代码：

1. <?php if (function_exists('MBThemes_breadcrumbs')) MBThemes_breadcrumbs(); ?>

复制代码

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