从特定父级获取 Wordpress 子类别
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Get Wordpress child category from specific parent
提问by Ciprian
I'm building a small thumbnail gallery with posts from a category that has the ID 406.
我正在构建一个小型缩略图库，其中包含来自 ID 为 406 的类别的帖子。
Some of the posts are in multiple categories and I'm not sure how to grab the category name that is a child of 406. $post_cat[0]->name;returns a category, but I only need it to return children of 406.
有些帖子属于多个类别，我不确定如何获取属于 406 的子类别的类别名称。$post_cat[0]->name;返回一个类别，但我只需要它来返回 406的子类别。
$thumbnails = get_posts('posts_per_page=10&cat=406');
foreach ($thumbnails as $thumbnail) {
$args = array(
'type' => 'post',
'child_of' => 0,
'parent' => 406,
);
$categories = get_categories ( $args );
foreach ( $categories as $category) {
$cat_name = $category->name;
$cat_slug = $category->slug;
}
echo $cat_name;
echo $cat_slug;
}
*EDIT**
*编辑**
$thumbnails = get_posts('posts_per_page=10&cat=406');
foreach ($thumbnails as $thumbnail) {
$post_cat = get_the_category( $thumbnail->ID );
echo '<li><a class="side-thumb" href="' . get_permalink( $thumbnail->ID ) . '" title="' . esc_attr( $thumbnail->post_title ) . '">';
if ( has_post_thumbnail($thumbnail->ID)) {
echo get_the_post_thumbnail($thumbnail->ID, 'thumbnail');
$upload_dir = wp_upload_dir();
$art_image = ''.$upload_dir['basedir'].'/icons/'.$post_cat[0]->slug.'.png';
if (file_exists($art_image)) {
echo '<p class="artist-latest"><img src="http://site.com/wp-content/uploads/icons/'.$post_cat[0]->slug.'.png" alt="'.$post_cat[0]->slug.'"/>'.$post_cat[0]->name.'</p>';
} else{
echo '<p class="artist-latest">'.$post_cat[0]->name.'</p>';
}
} else {
}
echo '</a></li>';
}
回答by sven
So now I'm fetching a list of category and its child, then I fetch posts having parent category assigned to it, after I get posts array, I loop into it and get all the categories assigned to the post, If there are additional categories other than the required category and its child I skip the post, otherwise do whatever I want to do.
所以现在我正在获取一个类别列表及其子项，然后我获取分配给它的父类别的帖子，在我获得帖子数组后，我循环进入它并获取分配给帖子的所有类别，如果还有其他类别除了所需的类别及其子项之外，我跳过该帖子，否则做我想做的任何事情。
$category = get_category_by_slug( 'category-name' );
$args = array(
'type' => 'post',
'child_of' => $category->term_id,
'orderby' => 'name',
'order' => 'ASC',
'hide_empty' => FALSE,
'hierarchical' => 1,
'taxonomy' => 'category',
);
$child_categories = get_categories($args );
$category_list = array();
$category_list[] = $category->term_id;
if ( !empty ( $child_categories ) ){
foreach ( $child_categories as $child_category ){
$category_list[] = $child_category->term_id;
}
}
$posts_args = array(
'posts_per_page' => 10,
'cat' => $category->term_id,
'post_type' => 'post',
'post_status' => 'publish',
'suppress_filters' => true
);
$posts = new WP_Query ( $posts_args );
if ( $posts->have_posts() ){
while ( $posts->have_posts() ){
$posts->the_post();
$category_array = array();
$post_categories = get_the_category ( get_the_ID() );
if ( !empty ( $post_categories ) ){
foreach ( $post_categories as $post_category ) {
$category_array[] = $post_category->term_id;
}
}
//Checks if post has an additional category
$result = array_diff( $category_array, $category_list );
if ( empty ( $result ) ) { ?>
<li>
<a href="<?php the_permalink(); ?>" class="side-thumb" title="<?php the_title(); ?>"> dfdf<?php
if ( has_post_thumbnail() ){
echo get_the_post_thumbnail();
}
//Put your default icon code here
?>
</a>
</li> <?php
}
}
}
wp_reset_postdata();
Above answer is as per your explanation, but I think what you want is, like you have a category Artists and there are subcategories each having a specific name, So for Artist gallery you want to display list of all the artists with their pictures.
上面的答案是根据您的解释，但我认为您想要的是，就像您有一个艺术家类别，并且每个子类别都有一个特定的名称，因此对于艺术家画廊，您希望显示所有艺术家及其图片的列表。
