wp文本小工具运行php代码实现面包屑导航步骤
在wordpress中,很多主题都提供了很多小工具,其中很有用的一个小工具就是文本小工具。
下面说一下具体如何让文本小工具运行php代码来实现面包屑导航。
1.首先在主题下的function.php中要先添加面包屑导航函数
//添加面包屑导航function iaccepted_breadcrumbs() { $delimiter = '»'; $name = 'Home'; //text for the 'Home' link $currentBefore = '<span>'; $currentAfter = '</span>'; if ( !is_home() && !is_front_page() || is_paged() ) { echo '<div id="crumbs">'; global $post; $home = get_bloginfo('url'); echo '<a href="' . $home . '"><font color=red>' . $name . '</font></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; 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() ) { $cat = get_the_category(); $cat = $cat[0]; echo get_category_parents($cat, TRUE, ' ' . $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 . get_search_query() . $currentAfter; } elseif ( is_tag() ) { echo $currentBefore; single_tag_title(); echo $currentAfter; } elseif ( is_author() ) { global $author; $userdata = get_userdata($author); echo $currentBefore .' ' . $userdata->display_name . $currentAfter; } elseif ( is_404() ) { echo $currentBefore . 'Error 404' . $currentAfter; } if ( get_query_var('paged') ) { if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ' ('; echo __('Page') . ' ' . get_query_var('paged'); if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ')'; } echo '</div>'; }}
2要让小工具能够运行php代码必须要现在主题下的functions.php中加入如下代码
//让小工具中可以嵌入php代码function php_text($text){ if (strpos($text, '<'.'?')!==false) { ob_start(); eval('?'.'>'.$text); $text = ob_get_contents(); ob_end_clean(); } return $text;}add_filter('widget_text', 'php_text', 90);
这个样就能保证文本小工具中可以嵌入php代码并能正常执行。
3.选择要加入导航的位置,放置一个文本小工具,然后标题不需要填,内容填写如下:
您现在的位置:<?php if (functions_exists('iaccepted_breadcrumbs')) iaccepted_breadcrumbs(); ?>
这样就完成了在文本小工具中运行php代码实现面包屑导航,具体效果可以看本文章上方的导航。

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