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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 1350 | /** |
| 1351 | * Filter the given taxonomy's terms cache. |
| 1352 | * |
| 1353 | * @since 2.3.0 |
| 1354 | * |
| 1355 | * @param array $cache Cached array of terms for the given taxonomy. |
| 1356 | * @param string|array $taxonomies A taxonomy or array of taxonomies. |
| 1357 | * @param array $args An array of arguments to get terms. |
| 1358 | */ |
| 1359 | $cache = apply_filters( 'get_terms', $cache, $taxonomies, $args ); |
| 1360 | return $cache; |
| 1361 | } |
| 1362 | |
| 1363 | $_orderby = strtolower($orderby); |
| 1364 | if ( 'count' == $_orderby ) |
| 1365 | $orderby = 'tt.count'; |
| 1366 | else if ( 'name' == $_orderby ) |
| 1367 | $orderby = 't.name'; |
| 1368 | else if ( 'slug' == $_orderby ) |
| Line | Code |
| 1555 | $terms = $wpdb->get_results($query); |
| 1556 | if ( 'all' == $fields ) { |
| 1557 | update_term_cache($terms); |
| 1558 | } |
| 1559 | |
| 1560 | if ( empty($terms) ) { |
| 1561 | wp_cache_add( $cache_key, array(), 'terms', DAY_IN_SECONDS ); |
| 1562 | |
| 1563 | /** This filter is documented in wp-includes/taxonomy.php */ |
| 1564 | $terms = apply_filters( 'get_terms', array(), $taxonomies, $args ); |
| 1565 | return $terms; |
| 1566 | } |
| 1567 | |
| 1568 | if ( $child_of ) { |
| 1569 | $children = _get_term_hierarchy( reset( $taxonomies ) ); |
| 1570 | if ( ! empty( $children ) ) |
| 1571 | $terms = _get_term_children( $child_of, $terms, reset( $taxonomies ) ); |
| 1572 | } |
| 1573 | |
| Line | Code |
| 1617 | if ( ! empty( $_terms ) ) |
| 1618 | $terms = $_terms; |
| 1619 | |
| 1620 | if ( $number && is_array( $terms ) && count( $terms ) > $number ) |
| 1621 | $terms = array_slice( $terms, $offset, $number ); |
| 1622 | |
| 1623 | wp_cache_add( $cache_key, $terms, 'terms', DAY_IN_SECONDS ); |
| 1624 | |
| 1625 | /** This filter is documented in wp-includes/taxonomy */ |
| 1626 | $terms = apply_filters( 'get_terms', $terms, $taxonomies, $args ); |
| 1627 | return $terms; |
| 1628 | } |
| 1629 | |
| 1630 | /** |
| 1631 | * Check if Term exists. |
| 1632 | * |
| 1633 | * Formerly is_term(), introduced in 2.3.0. |
| 1634 | * |
| 1635 | * @since 3.0.0 |