在网站开发中，常常需要获取网站所有分类目的名称和ID号，来实现调用相应的数据。在wordpress建站视频教程中我们介绍了怎么创建分类目录，下面学做网站论坛介绍一下Wordpress获取网站所有分类目录名称、ID号、链接。

方法一：通过SQL语句进行获取

 <?php 
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->name."(<em>".$category->term_id.'</em>)</span>';

        echo $output;

    }
?>

方法二：通过程序语句获取

<?php
$args=array(

  'orderby' => 'name',

  'include'=> '1,3,2',//排除的分类ID

  'order' => 'ASC'

  );
$categories=get_categories($args);

  foreach($categories as $category) { 

    echo '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . '>' . $category->name.'</a>';

    } 
?>