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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 |
|---|---|
| 1703 | * Filters the IDs of terms excluded from adjacent post queries. |
| 1704 | * |
| 1705 | * The dynamic portion of the hook name, `$adjacent`, refers to the type |
| 1706 | * of adjacency, 'next' or 'previous'. |
| 1707 | * |
| 1708 | * @since 4.4.0 |
| 1709 | * |
| 1710 | * @param array $excluded_terms Array of excluded term IDs. |
| 1711 | */ |
| 1712 | $excluded_terms = apply_filters( "get_{$adjacent}_post_excluded_terms", $excluded_terms ); |
| 1713 | |
| 1714 | if ( $in_same_term || ! empty( $excluded_terms ) ) { |
| 1715 | if ( $in_same_term ) { |
| 1716 | $join .= " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id"; |
| 1717 | $where .= $wpdb->prepare( 'AND tt.taxonomy = %s', $taxonomy ); |
| 1718 | |
| 1719 | if ( ! is_object_in_taxonomy( $post->post_type, $taxonomy ) ) { |
| 1720 | return ''; |
| 1721 | } |