WordPress网站的内页当中，为了使网站层次表现的更加清晰，让客户明确知道自己当前所在的位置，我们通常会加入面包屑导航功能，英文名叫 Breadcrumb 。下面介绍一下中添加面包屑导航 Breadcrumb 的方法。
1. 切换到主题所在目录，新建一个 breadcrumb.php 文件，加入以下代码：
»
term_id,true,' » ') );
the_title();
}elseif (is_page()) {
the_title();
}elseif (is_404()) {
echo '404 NOT FOUND';
};
wp_reset_query();
?>
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Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-6">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_searchCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-7">Crayon-h"> Crayon-k ">echoCrayon-h"> Crayon-v">$sCrayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-8">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_tagCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-9">Crayon-h"> Crayon-e">single_tag_titleCrayon-sy">(Crayon-sy">)Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-10">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_yearCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-11">Crayon-h"> Crayon-e">the_timeCrayon-sy">(Crayon-s">'Y'Crayon-sy">)Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-12">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_monthCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-13">Crayon-h"> Crayon-e">the_timeCrayon-sy">(Crayon-s">'Y-m'Crayon-sy">)Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-14">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-sy">(Crayon-h"> Crayon-e">is_dayCrayon-sy">(Crayon-sy">)Crayon-h"> Crayon-sy">)Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-15">Crayon-h"> Crayon-e">the_timeCrayon-sy">(Crayon-s">'Y-m-d'Crayon-sy">)Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-16">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_authorCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-17">Crayon-h"> Crayon-k ">echoCrayon-h"> Crayon-s">'Author'Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-18">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_singleCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line" id="Crayon-5c891d506fccc816473189-19">Crayon-h"> Crayon-v">$catsCrayon-h"> Crayon-o">=Crayon-h"> Crayon-e">get_the_categoryCrayon-sy">(Crayon-sy">)Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-20">Crayon-h"> Crayon-v">$catCrayon-h"> Crayon-o">=Crayon-h"> Crayon-v">$catsCrayon-sy">[Crayon-cn">0Crayon-sy">]Crayon-sy">; Crayon-line" id="Crayon-5c891d506fccc816473189-21">Crayon-h"> Crayon-k ">echoCrayon-sy">(Crayon-h"> Crayon-e">get_category_parentsCrayon-sy">(Crayon-v">$catCrayon-i">term_idCrayon-sy">,Crayon-t">trueCrayon-sy">,Crayon-s">' » 'Crayon-sy">)Crayon-h"> Crayon-sy">)Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-22">Crayon-h"> Crayon-e">the_titleCrayon-sy">(Crayon-sy">)Crayon-sy">; Crayon-line" id="Crayon-5c891d506fccc816473189-23">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_pageCrayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-24">Crayon-h"> Crayon-e">the_titleCrayon-sy">(Crayon-sy">)Crayon-sy">; Crayon-line" id="Crayon-5c891d506fccc816473189-25">Crayon-h"> Crayon-sy">}Crayon-st">elseifCrayon-h"> Crayon-sy">(Crayon-e">is_404Crayon-sy">(Crayon-sy">)Crayon-sy">)Crayon-h"> Crayon-sy">{ Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-26">Crayon-h"> Crayon-k ">echoCrayon-h"> Crayon-s">'404 NOT FOUND'Crayon-sy">; Crayon-line Crayon-striped-line" id="Crayon-5c891d506fccc816473189-28">Crayon-h"> Crayon-e">wp_reset_queryCrayon-sy">(Crayon-sy">)Crayon-sy">; Crayon-line" id="Crayon-5c891d506fccc816473189-29">Crayon-h"> 2. 打开page.PHP 或者 category.PHP，在需要显示导航的地方使用下面的代码调用： Crayon-5c891d506fcd6921147488" class="Crayon-Syntax Crayon-theme-classic Crayon-font-monaco Crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouSEOver" style=" margin-top: 12px; margin-bottom: 12px; font-size: 12px !important; line-height: 15px !important;"> Crayon-toolbar" data-settings=" mouSEOver overlay hide delay" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">Crayon-title">page.PHP Crayon-tools" style="font-size: 12px !important;height: 18px !important; line-height: 18px !important;">Crayon-mixed-highlight" title="Contains Mixed Languages"> Crayon-button Crayon-nums-button" title="Toggle Line Numbers"> Crayon-button-icon"> Crayon-button Crayon-plain-button" title="Toggle Plain Code"> Crayon-button-icon"> Crayon-button Crayon-wrap-button" title="Toggle Line Wrap"> Crayon-button-icon"> Crayon-button Crayon-expand-button" title="Expand Code"> Crayon-button-icon"> Crayon-button Crayon-popup-button" title="Open Code In New Window"> Crayon-button-icon"> Crayon-info" style="min-height: 16.8px !important; line-height: 16.8px !important;"> Crayon-plain-wrap"> Crayon-main" style="">
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