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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 |
---|---|
1856 | * of adjacency, 'next' or 'previous'. |
1857 | * |
1858 | * @since 2.6.0 |
1859 | * |
1860 | * @param string $output The adjacent post link. |
1861 | * @param string $format Link anchor format. |
1862 | * @param string $link Link permalink format. |
1863 | * @param WP_Post $post The adjacent post. |
1864 | */ |
1865 | return apply_filters( "{$adjacent}_post_link", $output, $format, $link, $post ); |
1866 | } |
1867 |
|
1868 | /** |
1869 | * Display adjacent post link. |
1870 | * |
1871 | * Can be either next post link or previous. |
1872 | * |
1873 | * @since 2.5.0 |
1874 | * @uses get_adjacent_post_link() |