Woocommerce 未捕获的错误：在 null 上调用成员函数 get_stock_quantity()

Question

我收到了来自 WordPress 的关于致命错误的消息。它与 WPML 字符串翻译插件后端中的特定页面相关。我想一个特别的翻译：

访问发现错误的页面 (xxxxxxxx/wp-admin/admin.php?page=wpml-translation-management%2Fmenu%2Ftranslations-queue.php&return_url=%2Fwp-admin%2Fpost.php%3Fpost%3D117195%26action%3Dedit%26lang%3Den%26message% 3D6&job_id=3741&update_needed=1&trid=129987&language_code=fr)

它也说

错误详情 ============= 文件第 259 行出现 E_ERROR 类型的错误 /nas/content/live/mywebsite/wp-content/themes/babasouk/functions.php。 错误消息：未捕获的错误：调用成员函数 get_stock_quantity() on null in /nas/content/live/mywebsite/wp-content/themes/mytheme/functions.php:259 堆栈跟踪： #0 /nas/content/live/mywebsite/wp-includes/class-wp-hook.php(303): bbloomer_custom_get_availability_text('100 in stock', NULL)

#1 /nas/content/live/mywebsite/wp-includes/plugin.php(189): WP_Hook->apply_filters('100 in stock', Array)

#2 /nas/content/live/mywebsite/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-product.php(2082)： apply_filters('woocommerce_get...', '100 现货', 对象（WC_Product_Variation））

#3 /nas/content/live/mywebsite/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-product.php(2058)： WC_Product->get_availability_text()

#4 /nas/content/live/mywebsite/wp-content/plugins/woocommerce/includes/wc-template-functions.php(3512): WC_Product->get_availability()

#5 /nas/content/live/mywebsite/wp-content/plugins/woocommerce/includes/class-wc-product-variable.php(367)： wc_get_stock_html(对象(W

在我的 PHP 中，我回显 get_stock_quantity() 并返回一个值。我还尝试了 $product 的 echo 并返回了所有内容。我禁用了它，因为它信息太多。 网站在这里。 https://babasoukstage.wpengine.com/shop/product-category/decor/moroccan-kilim-pillows/

问题可能是我声明要翻译的“空值”吗？ __( '', '巴巴苏克' );

我的 PHP 是

function bbloomer_show_stock_shop() {
  global $product;
  echo wc_get_stock_html( $product );
}
// CHANGE STOCK MESSAGES
add_filter( 'woocommerce_get_availability_text', 'bbloomer_custom_get_availability_text', 99, 2 );

function bbloomer_custom_get_availability_text( $availability, $product ) {
  global $product; // TO MAKE CATEGORY AVAILABLE
  $stock = $product->get_stock_quantity(); //THIS IS LINE 259
    //echo $product; does echo all product details when active
    echo $stock;//test to see if stock quantity returned. Does display on category and product pages.
  // OUTSIDE THE CATEGORY EXCLUSION SO THEY APPLY TO ALL 
  if ( !$product->is_in_stock() )$availability = __( 'Sorry, I am sold out!', 'babasouk' ); //OUT OF STOCK MESSAGE
    if ( $product->is_in_stock() && ( $stock >= 2 ) )$availability = __( '', 'babasouk' ); //NO MESSAGE IF STOCK OVER 1
  //EXCLUDE THESE CATEGORIES FOR 1 ITEM LEFT MESSAGE. IF THESE CATEGORIES MESSAGE IS BLANK.
  if ( has_term( array( 'ORIGINAL ARTWORKS', 'OEUVRES ORIGINALES' ), 'product_cat' ) ) {
    if ( $product->is_in_stock() && ( $stock == 1 ) )$availability = __( '', 'babasouk' ); //
  } //IF NOT EXCLUDED CATEGORIES MESSAGE IS 'Only 1 Available!'
  else if ( $product->is_in_stock() && ( $stock == 1 ) )$availability = __( 'Only 1 Available!', 'babasouk' );
  return $availability;
}

Answer 1

您的代码中有错误，并且日志也会告诉您问题所在。由于您位于functions.php 文件中，因此没有可用的global $product。因此，您会得到一个空指针，因为您什么都没有覆盖可用的产品变量。当我检查您从中获取的页面上的 sn-p 时，也没有使用 global $product - 只是想知道......

当你检查钩子时，你可以看到有产品已经传递给函数。就用它吧：

add_filter( 'woocommerce_get_availability_text', 'bbloomer_custom_get_availability_text', 99, 2 );
function bbloomer_custom_get_availability_text( $availability, WC_Product $product ) {
    $stock = $product->get_stock_quantity(); //THIS IS LINE 259
    //echo $product; does echo all product details when active
    error_log( $stock );//test to see if stock quantity returned. Does display on category and product pages.
    // OUTSIDE THE CATEGORY EXCLUSION SO THEY APPLY TO ALL
    if ( $product->is_in_stock() ) {
        if ( $stock > 1 ) {
            $availability = __( '', 'babasouk' );
        }

        if ( $stock === 1 ) {
            if ( has_term( [ 'ORIGINAL ARTWORKS', 'OEUVRES ORIGINALES' ], 'product_cat', $product ) ) {
                $availability = __( '', 'babasouk' );
            } else {
                $availability = __( 'Only 1 Available!', 'babasouk' );
            }
        }
    } else {
        $availability = __( 'Sorry, I am sold out!', 'babasouk' );
    }

    return $availability;
}

我还稍微改进了您的代码。最后，您的功能对我来说不是很有意义，但没关系 - 只是为了向您展示一种更好的嵌套方式和速度改进。如果您只调用一次函数而不是多次调用，则可以提高页面速度。