images - add the post as canonical for attachment page wordpress

admin管理员组

文章数量:1416302

the attachment page should have canonical added to the main post

on attachment page (image.php) I currently have (automatically added by All in One Seo Pack):

<link rel="canonical" href="" />

And I want to change it to point to the post (where this image is attached)

<link rel="canonical" href="" />

You can ignore All in One Seo Pack if that is difficutl to change, and maybe simple provide a way to add the canonical to the main post.

the attachment page should have canonical added to the main post

on attachment page (image.php) I currently have (automatically added by All in One Seo Pack):

<link rel="canonical" href="https://example/main-post/image-name" />

And I want to change it to point to the post (where this image is attached)

<link rel="canonical" href="https://example/main-post" />

You can ignore All in One Seo Pack if that is difficutl to change, and maybe simple provide a way to add the canonical to the main post.

• images
• attachments
• seo
• plugin-all-in-one-seo
• rel-canonical

Share Improve this question asked Jun 28, 2017 at 10:13 vyperlookvyperlook 17755 silver badges2424 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 2

Here's an (untested) example where we inject into the header tag on attachment's pages, the canonical link of the attached post:

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 ) )
    );
} 

Note that we can't use the get_canonical_url filter here to adjust the canonical url, as it's only applied to objects with publish post status. Attachments have inherit post status.

本文标签： imagesadd the post as canonical for attachment page wordpress