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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 |
---|---|
1242 | $key = md5( serialize( compact(array_keys($defaults)) ) . serialize( $taxonomies ) . $filter_key ); |
1243 | $last_changed = wp_cache_get('last_changed', 'terms'); |
1244 | if ( !$last_changed ) { |
1245 | $last_changed = time(); |
1246 | wp_cache_set('last_changed', $last_changed, 'terms'); |
1247 | } |
1248 | $cache_key = "get_terms:$key:$last_changed"; |
1249 | $cache = wp_cache_get( $cache_key, 'terms' ); |
1250 | if ( false !== $cache ) { |
1251 | $cache = apply_filters('get_terms', $cache, $taxonomies, $args); |
1252 | return $cache; |
1253 | } |
1254 |
|
1255 | $_orderby = strtolower($orderby); |
1256 | if ( 'count' == $_orderby ) |
1257 | $orderby = 'tt.count'; |
1258 | else if ( 'name' == $_orderby ) |
1259 | $orderby = 't.name'; |
1260 | else if ( 'slug' == $_orderby ) |
Line | Code |
1399 | } |
1400 |
|
1401 | $terms = $wpdb->get_results($query); |
1402 | if ( 'all' == $fields ) { |
1403 | update_term_cache($terms); |
1404 | } |
1405 |
|
1406 | if ( empty($terms) ) { |
1407 | wp_cache_add( $cache_key, array(), 'terms', DAY_IN_SECONDS ); |
1408 | $terms = apply_filters('get_terms', array(), $taxonomies, $args); |
1409 | return $terms; |
1410 | } |
1411 |
|
1412 | if ( $child_of ) { |
1413 | $children = _get_term_hierarchy($taxonomies[0]); |
1414 | if ( ! empty($children) ) |
1415 | $terms = _get_term_children($child_of, $terms, $taxonomies[0]); |
1416 | } |
1417 |
|
Line | Code |
1451 | $terms = $_terms; |
1452 | } |
1453 |
|
1454 | if ( 0 < $number && intval(@count($terms)) > $number ) { |
1455 | $terms = array_slice($terms, $offset, $number); |
1456 | } |
1457 |
|
1458 | wp_cache_add( $cache_key, $terms, 'terms', DAY_IN_SECONDS ); |
1459 |
|
1460 | $terms = apply_filters('get_terms', $terms, $taxonomies, $args); |
1461 | return $terms; |
1462 | } |
1463 |
|
1464 | /** |
1465 | * Check if Term exists. |
1466 | * |
1467 | * Formerly is_term(), introduced in 2.3.0. |
1468 | * |
1469 | * @package WordPress |