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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 |
|---|---|
| 1930 | * Filters the adjacent post relational link. |
| 1931 | * |
| 1932 | * The dynamic portion of the hook name, `$adjacent`, refers to the type |
| 1933 | * of adjacency, 'next' or 'previous'. |
| 1934 | * |
| 1935 | * @since 2.8.0 |
| 1936 | * |
| 1937 | * @param string $link The relational link. |
| 1938 | */ |
| 1939 | return apply_filters( "{$adjacent}_post_rel_link", $link ); |
| 1940 | } |
| 1941 | |
| 1942 | /** |
| 1943 | * Displays the relational links for the posts adjacent to the current post. |
| 1944 | * |
| 1945 | * @since 2.8.0 |
| 1946 | * |
| 1947 | * @param string $title Optional. Link title format. Default '%title'. |
| 1948 | * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false. |