我正在尝试根据（pa\\U product-series）中的属性值创建产品循环。许多产品可以有相同的价值，但我只想从每个产品中返回一个。。。避免使用价值相同的多个产品。

示例（xxxx是产品系列）：

产品1-x400产品2-x400产品3-x500产品4-x600产品5-x600

结果应仅显示产品1、产品3和产品4。

这是我到目前为止的代码，但它返回的是一个空数组

global $product;

$prod_series = $product->get_attribute( \'pa_product-series\' );

$postid = get_the_ID();

$args = array(
    \'post_type\' => \'product\',
    \'orderby\' => \'title\',
    \'order\' => \'asc\',
    \'posts_per_page\' => 10,
    \'tax_query\' => array(
    \'relation\' => \'\', array(
            \'taxonomy\' => \'pa_product-series\',
            \'field\'      => \'slug\',
            \'terms\'    => $prod_series
        ),
  )
);

$loop = new WP_Query( $args );
if ( $loop->have_posts() ):
    $term_names = array();
    while ( $loop->have_posts() ): 
        $loop->the_post();


        foreach( wc_get_product_terms($loop->post->ID, \'pa_product-series\' ) as $attribute_value ):
            $term_names[$attribute_value] = $attribute_value;
        endforeach;
    endwhile;

    print_r($attribute_value);

else:
   echo \'<span>No SKUs matches found</span>\';
endif;

wp_reset_postdata();

当我使用print\\u r（$attribute\\u value）时，它返回以下内容：

WP_Term Object ( 
[term_id] => 1687 
[name] => CT0201CSF 
[slug] => ct0201csf 
[term_group] => 0 
[term_taxonomy_id] => 1687 
[taxonomy] => pa_product-series 
[description] => 
[parent] => 0 
[count] => 2 
[filter] => raw 
[term_order] => 0 
)
WP_Term Object ( 
[term_id] => 1687 
[name] => CT0201CSF 
[slug] => ct0201csf 
[term_group] => 0 
[term_taxonomy_id] => 1687 
[taxonomy] => pa_product-series 
[description] => 
[parent] => 0 
[count] => 2 
[filter] => raw 
[term_order] => 0 
)

我需要将每个term\\u id或名称限制为1个结果。。。

if ( have_posts() ) {
    $term_names = array();
    while ( have_posts() ) {

        the_post(); 
        $myPostID = get_the_ID();

        //Uncomment next 3 lines to debug using your error log
        //ob_start();
        //var_dump($myPostID);
        //error_log(\'myPostID = \' . ob_get_clean(),0);

        $arrProductTerms = wc_get_product_terms( $myPostID, \'pa_product-series\' );

        //Uncomment next 3 lines to debug using your error log
        //ob_start();
        //var_dump($arrProductTerms);
        //error_log(\'arrProductTerms = \' . ob_get_clean(),0);

        foreach($arrProductTerms as $att){
           // prevent later values from overwriting existing...
           // Also, I believe $att is an object with properties, so you need to choose which one should be unique. I chose "slug"
           if (!array_key_exists($att->slug,$term_names)) $term_names[$att->slug]=$att;
        } // loop foreach

    } // loop while
    // sort by key ($att->slug)
    ksort($term_names);

    // Used array_keys because we stored $att as objects
    echo \'<span>\' . implode( \'</span>, <span>\', array_keys($term_names) ) . \'</span> \';

} else {
    echo \'<span>No SKUs matches found</span>\';
}  // end if