wp-includes/media.php:4164Retrieves taxonomies attached to given the attachment.
$attachmentint|array|object$outputstringoptional'names'string[]|WP_Taxonomy[]function get_attachment_taxonomies( $attachment, $output = 'names' ) { if ( is_int( $attachment ) ) { $attachment = get_post( $attachment ); } elseif ( is_array( $attachment ) ) { $attachment = (object) $attachment; } if ( ! is_object( $attachment ) ) { return array(); } $file = get_attached_file( $attachment->ID ); $filename = wp_basename( $file ); $objects = array( 'attachment' ); if ( str_contains( $filename, '.' ) ) { $objects[] = 'attachment:' . substr( $filename, strrpos( $filename, '.' ) + 1 ); } if ( ! empty( $attachment->post_mime_type ) ) { $objects[] = 'attachment:' . $attachment->post_mime_type; if ( str_contains( $attachment->post_mime_type, '/' ) ) { foreach ( explode( '/', $attachment->post_mime_type ) as $token ) { if ( ! empty( $token ) ) { $objects[] = "attachment:$token"; } } } } $taxonomies = array(); foreach ( $objects as $object ) { $taxes = get_object_taxonomies( $object, $output ); if ( $taxes ) { $taxonomies = array_merge( $taxonomies, $taxes ); } } if ( 'names' === $output ) { $taxonomies = array_unique( $taxonomies ); } return $taxonomies;}Introduced in 4.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.