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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1617 | * Filter the adjacent post relational link. |
| 1618 | * |
| 1619 | * The dynamic portion of the hook name, $adjacent, refers to the type |
| 1620 | * of adjacency, 'next' or 'previous'. |
| 1621 | * |
| 1622 | * @since 2.8.0 |
| 1623 | * |
| 1624 | * @param string $link The relational link. |
| 1625 | */ |
| 1626 | return apply_filters( "{$adjacent}_post_rel_link", $link ); |
| 1627 | } |
| 1628 | |
| 1629 | /** |
| 1630 | * Display relational links for the posts adjacent to the current post. |
| 1631 | * |
| 1632 | * @since 2.8.0 |
| 1633 | * |
| 1634 | * @param string $title Optional. Link title format. |
| 1635 | * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. |