下面是一个（未经测试的）示例，我们在附件页面的标题标记中插入了附件帖子的规范链接：

add_action( \'wp_head\', \'wpse_attachment_parent_canonical\' );

function wpse_attachment_parent_canonical()
{
    // Only target attachment\'s pages
    if( ! is_attachment() )
        return;

    $object = get_queried_object();

    // Make sure we\'re dealing with a WP_Post object
    if ( ! is_a( $object, \'\\WP_Post\' ) )
        return;

    // Only target attachments that are attached to posts
    if( 0 == $object->post_parent )
        return;

    // Output canonical link
    printf(
        \'<link rel="canonical" href="%s" />\' . PHP_EOL,
        esc_url( get_permalink( $object->post_parent ) )
    );
} 

下面是一个（未经测试的）示例，我们在附件页面的标题标记中插入了附件帖子的规范链接：

add_action( \'wp_head\', \'wpse_attachment_parent_canonical\' );

function wpse_attachment_parent_canonical()
{
    // Only target attachment\'s pages
    if( ! is_attachment() )
        return;

    $object = get_queried_object();

    // Make sure we\'re dealing with a WP_Post object
    if ( ! is_a( $object, \'\\WP_Post\' ) )
        return;

    // Only target attachments that are attached to posts
    if( 0 == $object->post_parent )
        return;

    // Output canonical link
    printf(
        \'<link rel="canonical" href="%s" />\' . PHP_EOL,
        esc_url( get_permalink( $object->post_parent ) )
    );
}