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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 |
---|---|
1925 | * @since 2.6.0 |
1926 | * @since 4.2.0 Added the `$adjacent` parameter. |
1927 | * |
1928 | * @param string $output The adjacent post link. |
1929 | * @param string $format Link anchor format. |
1930 | * @param string $link Link permalink format. |
1931 | * @param WP_Post $post The adjacent post. |
1932 | * @param string $adjacent Whether the post is previous or next. |
1933 | */ |
1934 | return apply_filters( "{$adjacent}_post_link", $output, $format, $link, $post, $adjacent ); |
1935 | } |
1936 |
|
1937 | /** |
1938 | * Display adjacent post link. |
1939 | * |
1940 | * Can be either next post link or previous. |
1941 | * |
1942 | * @since 2.5.0 |
1943 | * |