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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 2 times in this file.
| Line | Code |
|---|---|
| 4989 | */ |
| 4990 | function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' ) { |
| 4991 | $object_id = (int) $object_id; |
| 4992 | |
| 4993 | $ancestors = array(); |
| 4994 | |
| 4995 | if ( empty( $object_id ) ) { |
| 4996 | |
| 4997 | /** This filter is documented in wp-includes/taxonomy.php */ |
| 4998 | return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type ); |
| 4999 | } |
| 5000 | |
| 5001 | if ( ! $resource_type ) { |
| 5002 | if ( is_taxonomy_hierarchical( $object_type ) ) { |
| 5003 | $resource_type = 'taxonomy'; |
| 5004 | } elseif ( post_type_exists( $object_type ) ) { |
| 5005 | $resource_type = 'post_type'; |
| 5006 | } |
| 5007 | } |
| Line | Code |
| 5021 | * |
| 5022 | * @since 3.1.0 |
| 5023 | * @since 4.1.1 Introduced the `$resource_type` parameter. |
| 5024 | * |
| 5025 | * @param int[] $ancestors An array of IDs of object ancestors. |
| 5026 | * @param int $object_id Object ID. |
| 5027 | * @param string $object_type Type of object. |
| 5028 | * @param string $resource_type Type of resource $object_type is. |
| 5029 | */ |
| 5030 | return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type ); |
| 5031 | } |
| 5032 | |
| 5033 | /** |
| 5034 | * Returns the term's parent's term ID. |
| 5035 | * |
| 5036 | * @since 3.1.0 |
| 5037 | * |
| 5038 | * @param int $term_id Term ID. |
| 5039 | * @param string $taxonomy Taxonomy name. |