您可以尝试woocommerce_gallery_image_html_attachment_image_params过滤器进行自定义。检查以下示例。它获取产品标题并将其分配给图像的alt和title属性。注意：这只适用于产品单页。

add_filter( 'woocommerce_gallery_image_html_attachment_image_params','wpso_customize_single_product_image' );

function wpso_customize_single_product_image( $details ) {
    global $product;
    $details['alt'] = $details['title'] = get_the_title( $product->get_id() );
    return $details;
}

登录到您的Phpmyadmin，选择您的数据库并运行此查询以更新图像标题：

UPDATE wp_posts as a
LEFT JOIN wp_postmeta as b ON a.ID = b.meta_value
LEFT JOIN wp_posts as c ON b.post_id = c.ID
SET a.post_title = c.post_title
WHERE a.post_type = 'attachment'
AND a.post_mime_type = 'image/jpeg'
AND b.meta_key = '_thumbnail_id'
AND c.post_type = 'product'

...和此SQL查询来更新图像alts：

UPDATE wp_postmeta as z 
LEFT JOIN wp_posts as a ON z.post_id = a.ID 
LEFT JOIN wp_postmeta as b ON a.ID = b.meta_value 
LEFT JOIN wp_posts as c ON b.post_id = c.ID 
SET z.meta_value = c.post_title 
WHERE z.meta_key = '_wp_attachment_image_alt' 
AND a.post_type = 'attachment' 
AND a.post_mime_type = 'image/jpeg' 
AND b.meta_key = '_thumbnail_id' 
AND c.post_type = 'product'