如何从 WooCommerce 产品页面上的面包屑中删除产品类别

Question

如果有更好的方法可以做到这一点，请原谅我，因为我对这段代码不是很熟悉。我只想在面包屑上显示主页链接和当前产品。

想要的结果：

目前：

我找到了面包屑的代码，有没有办法只显示第一个和最后一个面包屑而不考虑层次结构？

    foreach ( $breadcrumb as $key => $crumb ) {

    echo $before;

    if ( ! empty( $crumb[1] ) && sizeof( $breadcrumb ) !== $key ) {
        echo '<a href="' . esc_url( $crumb[1] ) . '">' . esc_html( $crumb[0] ) . '</a>';
    } else if(!is_product() && !flatsome_option('wc_category_page_title')) {
        echo esc_html( $crumb[0] );
    }

    echo $after;

    // Single product or Active title
    if(is_product() || flatsome_option('wc_category_page_title')){
            $key = $key+1;
            if ( sizeof( $breadcrumb ) > $key) {
                echo ' <span class="divider">'.$delimiter.'</span> ';
            }
    } else{
        
    // Category pages
    if ( sizeof( $breadcrumb ) !== $key + 1 ) {
            echo ' <span class="divider">'.$delimiter.'</span> ';
        }
    }

}

我这样做的原因是一些产品有多个类别，默认情况下，它只会显示主要类别的面包屑。我宁愿按照所有者的建议制作一个截断的版本。

我也想知道是否可以简单地动态检索产品标题和链接+静态主页链接，将其制作成简码，以便我可以将其粘贴到产品页面中。

Answer 1

嗨——上面答案中的第一个例子，也从 woocommerce 面包屑中删除了商店。这是一个工作示例，它只删除了类别：

// remove only the category from woocommerce breadcrumbs
add_filter( 'woocommerce_get_breadcrumb', 'custom_breadcrumb', 20, 2 );
function custom_breadcrumb( $crumbs, $breadcrumb ) {
//print the array and look for the key with the category
//echo '<pre>';
//print_r($crumbs);
//echo '</pre>';
//unset($crumbs[2]); in my case it is key 2

// only on the single product page
if ( ! is_product() ) {
    return $crumbs;
} else {

  unset($crumbs[2]); // this isn't enough, it would leave a trailing delimiter
  $newBreadC = array_values($crumbs); //therefore create new array

  return $newBreadC; //return the new array
}
}

Answer 2

如果您想在产品页面上从产品面包屑中删除类别和子类别，您可以使用woocommerce_get_breadcrumb 挂钩。

// change the breadcrumb on the product page
add_filter( 'woocommerce_get_breadcrumb', 'custom_breadcrumb', 20, 2 );
function custom_breadcrumb( $crumbs, $breadcrumb ) {

    // only on the single product page
    if ( ! is_product() ) {
        return $crumbs;
    }
    
    // gets the first element of the array "$crumbs"
    $new_crumbs[] = reset( $crumbs );
    // gets the last element of the array "$crumbs"
    $new_crumbs[] = end( $crumbs );

    return $new_crumbs;

}

代码已经过测试并且可以运行。将其添加到活动主题的 functions.php 中。

一个不错的选择是为每个产品设置主要产品类别。您可以通过安装Yoast SEO 插件来做到这一点。

您可以使用_yoast_wpseo_primary_product_cat 产品元设置主要产品类别的ID。

通过在 后端或导入 .csv 文件您只需更改 永久链接和基于主要产品类别的面包屑。

更新产品永久链接：

// update the product permalink based on the primary product category
add_filter( 'wc_product_post_type_link_product_cat', 'change_product_permalink_by_cat', 10, 3 );
function change_product_permalink_by_cat( $term, $terms, $post ) {

    // get the primary term as saved by Yoast
    $primary_cat_id = get_post_meta( $post->ID, '_yoast_wpseo_primary_product_cat', true );

    // if there is a primary and it's not currently chosen as primary
    if ( $primary_cat_id && $term->term_id != $primary_cat_id ) {
        // find the primary term in the term list
        foreach ( $terms as $term_key => $term_object ) {
            if ( $term_object->term_id == $primary_cat_id ) {
                // return this as the primary term
                $term = $terms[ $term_key ];
                break;
            }
        }
    }

    return $term;
}

更新产品页面上的产品面包屑：

// change the breadcrumb on the product page
add_filter( 'woocommerce_get_breadcrumb', 'custom_breadcrumb', 20, 2 );
function custom_breadcrumb( $crumbs, $breadcrumb ) {

    // only on the single product page
    if ( ! is_product() ) {
        return $crumbs;
    }

    global $product;
    $new_crumbs = array();

    if ( $product->get_meta( '_yoast_wpseo_primary_product_cat', true ) ) {
        // gets the first element of the array "$crumbs"
        $new_crumbs[] = reset( $crumbs );
        // gets the id of the primary product category
        $primary_cat_id = $product->get_meta( '_yoast_wpseo_primary_product_cat', true );
        // create an array with all parent categories (based on the id of the primary product category)
        $parent_categories = get_ancestors( $primary_cat_id, 'product_cat' );
        $parent_categories = array_reverse($parent_categories);
        $parent_categories[] = $primary_cat_id;
        // for each product category it gets the name and the permalink
        foreach ( $parent_categories as $cat_id ) {
            $term = get_term_by( 'id', $cat_id, 'product_cat' );
            $new_crumbs[] = array(
                0  =>  $term->name,
                1  =>  esc_url( get_term_link( $term, 'product_cat' ) )
            );
        }
        // gets the last element of the array "$crumbs"
        $new_crumbs[] = end( $crumbs );
    } else {
        // gets the first element of the array "$crumbs"
        $new_crumbs[] = reset( $crumbs );
        // gets the last element of the array "$crumbs"
        $new_crumbs[] = end( $crumbs );
    }

    return $new_crumbs;

}

代码已经过测试并且可以运行。将其添加到活动主题的 functions.php 中。