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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 |
|---|---|
| 1527 | * The dynamic portion of the hook name, `$adjacent`, refers to the type |
| 1528 | * of adjacency, 'next' or 'previous'. |
| 1529 | * |
| 1530 | * @since 2.5.0 |
| 1531 | * |
| 1532 | * @param string $join The JOIN clause in the SQL. |
| 1533 | * @param bool $in_same_term Whether post should be in a same taxonomy term. |
| 1534 | * @param array $excluded_terms Array of excluded term IDs. |
| 1535 | */ |
| 1536 | $join = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_term, $excluded_terms ); |
| 1537 | |
| 1538 | /** |
| 1539 | * Filter the WHERE clause in the SQL for an adjacent post query. |
| 1540 | * |
| 1541 | * The dynamic portion of the hook name, `$adjacent`, refers to the type |
| 1542 | * of adjacency, 'next' or 'previous'. |
| 1543 | * |
| 1544 | * @since 2.5.0 |
| 1545 | * |