WordPress代码 之 获取WordPress所有分类名字和ID

/**
 * 获取WordPress所有分类名字和ID
 * https://www.wpdaxue.com/show-wordpress-category.html
 */
function show_category(){
    global $wpdb;
    $request = "SELECT $wpdb->terms.term_id, name FROM $wpdb->terms ";
    $request .= " LEFT JOIN $wpdb->term_taxonomy ON $wpdb->term_taxonomy.term_id = $wpdb->terms.term_id ";
    $request .= " WHERE $wpdb->term_taxonomy.taxonomy = 'category' ";
    $request .= " ORDER BY term_id asc";
    $categorys = $wpdb->get_results($request);
    foreach ($categorys as $category) { //调用菜单
        $output = '<span>'.$category-&gt;name."(<em>".$category-&gt;term_id.'</em>)</span>';
        echo $output;
    }
}

/** * 获取WordPress所有分类名字和ID * https://www.wpdaxue.com/show-wordpress-category.html */ function show_category(){ global $wpdb; $request = "SELECT $wpdb-&gt;terms.term_id, name FROM $wpdb-&gt;terms "; $request .= " LEFT JOIN $wpdb-&gt;term_taxonomy ON $wpdb-&gt;term_taxonomy.term_id = $wpdb-&gt;terms.term_id "; $request .= " WHERE $wpdb-&gt;term_taxonomy.taxonomy = 'category' "; $request .= " ORDER BY term_id asc"; $categorys = $wpdb-&gt;get_results($request); foreach ($categorys as $category) { //调用菜单 $output = '<span>'.$category-&gt;name."(<em>".$category-&gt;term_id.'</em>)</span>'; echo $output; } }

<?php show_category(); ?>

&lt;?php show_category(); ?&gt;