WordPress的PHP：显示页面的子代（编辑现有代码）

Question

我正在帮助朋友对wordpress主题进行一些更改。目前显示子页面仅适用于一个父母及其子页面（ID为31的子页面），但我们希望它适用于所有页面（及其子页面）。我想或多或少地保留代码，只需进行必要的更改即可应用于所有代码。

虽然我对css和html很不错，但php并不是我的强项，所以我希望你的帮助能够解决这个问题。这是现有的代码：

$currentPageId = get_the_ID(); 

$pages = get_pages('child_of=31'); 
$i=0; 
foreach($pages as $child) { 
$childrenPageID[$i] = $child->ID; 
$i++; 
} 

if ((get_the_ID() == 31) || (in_array($currentPageId, $childrenPageID))) { 

    $taxonomy  = 'portfoliocat'; 
    $orderby  = 'name'; 
    $show_count = 0;  // 1 for yes, 0 for no 
    $pad_counts = 0;  // 1 for yes, 0 for no 
    $child_of  = 5; 
    $show_count = 1; 
    $title_li  = null; 


    $args = array(
     'taxonomy'  => $taxonomy, 
     'orderby'  => $orderby, 
     'show_count' => $show_count, 
     'pad_counts' => $pad_counts, 
     'child_of'  => $child_of, 
     'show_count' => $show_count, 
     'title_li' => $title_li 
    ); 

    ?> 

    <div style="overflow:auto; margin-bottom:20px;"> 
     <ul style="list-style-type:none; margin-left: 0px;"> 
     <?php 
     $cat = get_query_var('cat'); 

     // count all categories 
     $totalCount = count(get_categories($args)); 
     $currentCount = 0; 

     foreach(get_categories($args) as $category) { 

      // get current number of stack 
     $currentCount = $currentCount + 1; 

     global $wpdb; 
     $lookForValue = $category->slug; 

     $querystr = "SELECT post_id 
        FROM $wpdb->postmeta 
        WHERE meta_key = 'category-include' AND meta_value = '".$lookForValue."'; 
     "; 
     $postid = $wpdb->get_var($wpdb->prepare($querystr)); 

      // logic to remove last trunk 
      if ($totalCount != $currentCount ) { 
      echo '<li class="cat-item"><a class="name" style="font-weight:bold" href="/?page_id='.$postid.'">' . $category->name.'</a>&nbsp;&nbsp;&nbsp;<span style="color: #999;">|</span>&nbsp;</li>'; 
      } 
      else { 
      echo '<li class="cat-item"><a class="name" style="font-weight:bold" href="/?page_id='.$postid.'">' . $category->name.'</a></li>'; 
      } 
     }?> 
     </ul> 
    </div> 

} 

我猜我需要更改if子句，但没有线索要替换它。有什么建议么？

在此先感谢！ Joanna

Answer 1

// If CHILD_OF is not NULL, then this page has a parent 
// Therefore, list siblings i.e. subpages of this page's parent 

if($post->post_parent){ 
    wp_list_pages('title_li=&include='.$post->post_parent); 
    wp_list_pages('title_li=&child_of='.$post->post_parent); 
}else{ 
    // If CHILD_OF is zero, this is a top level page, so list subpages only. 
    wp_list_pages('title_li=&include='.$post->ID); 
    wp_list_pages('title_li=&child_of='.$post->ID); 
}