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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 |
|---|---|
| 1777 | * Filter the adjacent post relational link. |
| 1778 | * |
| 1779 | * The dynamic portion of the hook name, `$adjacent`, refers to the type |
| 1780 | * of adjacency, 'next' or 'previous'. |
| 1781 | * |
| 1782 | * @since 2.8.0 |
| 1783 | * |
| 1784 | * @param string $link The relational link. |
| 1785 | */ |
| 1786 | return apply_filters( "{$adjacent}_post_rel_link", $link ); |
| 1787 | } |
| 1788 | |
| 1789 | /** |
| 1790 | * Display relational links for the posts adjacent to the current post. |
| 1791 | * |
| 1792 | * @since 2.8.0 |
| 1793 | * |
| 1794 | * @param string $title Optional. Link title format. |
| 1795 | * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. |