從存檔中調用的CPT頁面上的WordPress上一個和下一個鏈接

Question

我有一個CPT和3個自定義分類法。 對於每個分類法，都有存檔頁面，其中按標題對分類法術語的項目進行排序。

項目頁面的頁腳中有prevoius / next-links，但這些鏈接在發布日期已鏈接到本CPT的上一個/下一個項目。

如訪問者所期望的那樣，如何用指向歸檔文件中上一個/下一個項目的鏈接替換它？

第一個想法是從存檔頁面傳輸循環內容並查找相鄰項？

Answer 1

您需要將此代碼添加到您的單一myposttype中。

/* Fist get the posts from specific taxonomy */
$postByTaxonomy = get_posts(array(
  'post_type' => 'post', // fruit
  'numberposts' => -1,
  //'order'          => 'ASC', // you can add to order by name
  //'orderby'        => 'title', // you can add to order by name
  'tax_query' => array(
    array(
      'taxonomy' => 'fruit-category', // category of Fruit CPT
      'field' => 'slug',
      'terms' => 'fruit-category-1', // This is the one you check from editor page
    )
  )
)); 

/* Store the IDs in array from get_posts above */
$theIDs = array();
foreach ($postByTaxonomy as $pbt) {
  $theIDs[] += $pbt->ID;
}
/* print_r($theIDs) = Array ( [0] => 3696 [1] => 3697 [2] => 128 [3] => 4515 [4] => 4516 [5] => 4514 ) */


/* Now we will use a php function array_search() for us to get the current post and we can set the previous and next IDs */
$current = array_search( get_the_ID(), $theIDs); /* here you need to get the id of the post get_the_ID() or $post->ID */
$prevID = $theIDs[$current-1];
$nextID = $theIDs[$current+1];

/* DISPLAY - Now that we have the IDs of the prev/next post you can use them to your template in your case the permalink */
<a href="<?php echo get_permalink($prevID); ?>"> Previous</a>
<a href="<?php echo get_permalink($nextID); ?>"> Next</a>