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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 |
|---|---|
| 1437 | /** |
| 1438 | * Filter the terms to exclude from the terms query. |
| 1439 | * |
| 1440 | * @since 2.3.0 |
| 1441 | * |
| 1442 | * @param string $exclusions NOT IN clause of the terms query. |
| 1443 | * @param array $args An array of terms query arguments. |
| 1444 | * @param string|array $taxonomies A taxonomy or array of taxonomies. |
| 1445 | */ |
| 1446 | $exclusions = apply_filters( 'list_terms_exclusions', $exclusions, $args, $taxonomies ); |
| 1447 | |
| 1448 | if ( ! empty( $exclusions ) ) { |
| 1449 | $where .= $exclusions; |
| 1450 | } |
| 1451 | |
| 1452 | if ( ! empty( $args['slug'] ) ) { |
| 1453 | $slug = sanitize_title( $args['slug'] ); |
| 1454 | $where .= " AND t.slug = '$slug'"; |
| 1455 | } |