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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 |
|---|---|
| 1539 | * The dynamic portion of the hook name, $adjacent, refers to the type |
| 1540 | * of adjacency, 'next' or 'previous'. |
| 1541 | * |
| 1542 | * @since 2.5.0 |
| 1543 | * |
| 1544 | * @param string $where The WHERE clause in the SQL. |
| 1545 | * @param bool $in_same_term Whether post should be in a same taxonomy term. |
| 1546 | * @param array $excluded_terms Array of excluded term IDs. |
| 1547 | */ |
| 1548 | $where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare( "WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = 'publish' $where", $current_post_date, $post->post_type ), $in_same_term, $excluded_terms ); |
| 1549 | |
| 1550 | /** |
| 1551 | * Filter the ORDER BY clause in the SQL for an adjacent post query. |
| 1552 | * |
| 1553 | * The dynamic portion of the hook name, $adjacent, refers to the type |
| 1554 | * of adjacency, 'next' or 'previous'. |
| 1555 | * |
| 1556 | * @since 2.5.0 |
| 1557 | * |