Php WooCommerce 相关产品(按 children 类别)作为排名数学主要类别的后备

要从子类别(子类别)中获取相关产品作为备用，当产品中只设置了一个产品类别时，请try 以下重新访问的代码:

// Rank Math SEO - Use Primary Category for Related Products
add_filter( 'woocommerce_related_products', 'related_products_from_rank_math_primary_category', 10, 3 );
function related_products_from_rank_math_primary_category( $related_posts, $product_id, $args  ) {
    $taxonomy     = 'product_cat';
    $category_ids = wp_get_post_terms($product_id, $taxonomy, array('fields' => 'ids') ); 
    $term_slugs   = array(); // Initializing   

    if( count($category_ids) == 1 ) {
        // Get children categories
        $children_ids = get_term_children( reset($category_ids), $taxonomy );
        // Loop through children terms Ids
        foreach ( $children_ids as $tem_id ) {
            $term_slugs[] = get_term_by( 'id', $tem_id, $taxonomy )->slug; // get the slug from each term Id
        }
    } 
    elseif( count( $category_ids ) > 1 ) {
        // Get the primary category/term as saved by Rank Math SEO
        $primary_cat_id = get_post_meta( $product_id, 'rank_math_primary_product_cat', true );
        $term_slugs[]   = get_term_by( 'id', $primary_cat_id, $taxonomy )->slug; // get the slug from the term Id
    }

    if ( count($term_slugs) > 0 ) {
        // Product query: Get product Ids
        $related_posts = wc_get_products( array(
            'status'        => 'publish',
            'category'      => $term_slugs,
            'return'        => 'ids',
            'exclude'       => array( $product_id ),
            'visibility'    => 'catalog',
            'limit'         => -1,
        ) );
    }
    return $related_posts;
}

它应该会像预期的那样工作.

当只有一个产品类别时，如果要将子术语ID与该当前产品类别合并，请在代码中替换:

foreach ( $children_ids as $tem_id ) {

使用

foreach ( array_merge( $category_ids, $children_ids ) as $tem_id ) {

添加

正如行动小组在 comments (separate parts)中所要求的那样:

function related_products_from_rank_math_primary_category( $related_posts, $product_id, $args  ) {
    $taxonomy     = 'product_cat';
    $category_ids = wp_get_post_terms($product_id, $taxonomy, array('fields' => 'ids') ); 

    // If there is only one product category
    if( count($category_ids) == 1 ) {
        $term_slugs   = array(); // Initializing  
        // Get children categories
        $children_ids = get_term_children( reset($category_ids), $taxonomy );
        // Loop through children terms Ids
        foreach ( array_merge( $category_ids, $children_ids ) as $tem_id ) {
            $term_slugs[] = get_term_by( 'id', $tem_id, $taxonomy )->slug; // get the slug from each term Id
        }
         // Product query: Get product Ids
        $related_posts = wc_get_products( array(
            'status'        => 'publish',
            'category'      => $term_slugs,
            'return'        => 'ids',
            'exclude'       => array( $product_id ),
            'visibility'    => 'catalog',
            'limit'         => -1,
        ) );
    } 

    // If the product has more than one product category
    if( count( $category_ids ) > 1 ) {
        // Get the primary category/term as saved by Rank Math SEO
        $primary_cat_id   = get_post_meta( $product_id, 'rank_math_primary_product_cat', true );
        $primary_cat_info = get_term_by( 'id', $primary_cat_id, $taxonomy );

        // Get ids of just the posts in this category. We only want related posts from the primary category.
        $related_posts = wc_get_products( array(
            'status'        => 'publish',
            'category'      => array( $primary_cat_info->slug ),
            'return'        => 'ids',
            'exclude'       => array( $product_id ),
            'visibility'    => 'catalog',
            'limit'         => -1,
        ) );
    }
    return $related_posts;
}
add_filter( 'woocommerce_related_products', 'related_products_from_rank_math_primary_category', 10, 3 );

它也应该以同样的方式工作.