如何在PHP函數中爲每個帖子ID選擇類別

Question

我有以下代碼從我的Wordpress數據庫中提取數據。我還想將這個類別添加到每一行信息中。

global $wpdb; 
$posts = $wpdb->get_results(" 
SELECT (SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_focuskw' AND post_id = $wpdb->posts.ID) AS focuskw, 
(SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_title' AND post_id = $wpdb->posts.ID) AS title, 
(SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_metadesc' AND post_id = $wpdb->posts.ID) AS metadesc, 
$wpdb->posts.ID, $wpdb->posts.post_type FROM `$wpdb->posts` 
WHERE $wpdb->posts.post_status = 'publish' 
AND (SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_meta-robots-noindex' AND post_id = $wpdb->posts.ID)is null 
AND ($wpdb->posts.post_type = 'page' OR $wpdb->posts.post_type = 'post') 
"); 

header('Content-type:text/plain'); 
foreach($posts as $post) { 
    $permalink = get_permalink($post->ID); 
    echo "</br>{$post->ID},{$post->post_type},{$permalink},{$post->focuskw}"; 
} 

據我瞭解，在接下來的部分，我要補充我的代碼：

global $wpdb; 
$posts = $wpdb->get_results(" 
SELECT (SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_focuskw' AND post_id = $wpdb->posts.ID) AS focuskw, 
(SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_title' AND post_id = $wpdb->posts.ID) AS title, 
(SELECT `meta_value` FROM `$wpdb->postmeta` WHERE `meta_key` = '_yoast_wpseo_metadesc' AND post_id = $wpdb->posts.ID) AS metadesc, 

因此，加入到最後一行上面，我是想添加類似：

(SELECT `wp_term_taxonomy` FROM `$wpdb->postmeta` WHERE `taxonomy` = 'category' AND post_id = $wpdb->posts.ID) AS category, 

基本上，我知道我需要從MySQL中獲取數據，但我不確定如何格式化PHP代碼以及使用哪個路徑。我對'get_the_category'選項進行了一些研究，但我不確定如何將其實現到此代碼中。

我該如何讓這段代碼也返回帖子分類？任何積極的投入或方向是高度讚賞。

Answer 1

好的，所以我實際上需要將代碼添加到底部。我使用'get_the-category'功能：

header('Content-type:text/plain'); 
foreach($posts as $post) { 
    $category = get_the_category($post->ID); 
     $postcat = $category[0]->cat_name; 
    $permalink = get_permalink($post->ID); 
    echo "</br>{$post->ID},{$post->post_type},{$permalink},{$postcat},{$post->focuskw}"; 
} 

希望這有助於任何人試圖列出PHP腳本中的類別和帖子。