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apply_filters( "get_{$adjacent}_post_join", string $join, bool $in_same_term, array $excluded_terms, string $taxonomy, WP_Post $post )

Filters the JOIN clause in the SQL for an adjacent post query.

The dynamic portion of the hook name, $adjacent, refers to the type of adjacency, ‘next’ or ‘previous’.

$join: (string) The JOIN clause in the SQL.
$in_same_term: (bool) Whether post should be in a same taxonomy term.
$excluded_terms: (array) Array of excluded term IDs.
$taxonomy: (string) Taxonomy. Used to identify the term used when $in_same_term is true.
$post: (WP_Post) WP_Post object.

Used By	Description
wp-includes/link-template.php: get_adjacent_post()	Retrieves the adjacent post.

Version	Description
4.4.0	Added the `$taxonomy` and `$post` parameters.
2.5.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/get_adjacent_post_join