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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 |
|---|---|
| 4871 | */ |
| 4872 | function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' ) { |
| 4873 | $object_id = (int) $object_id; |
| 4874 | |
| 4875 | $ancestors = array(); |
| 4876 | |
| 4877 | if ( empty( $object_id ) ) { |
| 4878 | |
| 4879 | /** This filter is documented in wp-includes/taxonomy.php */ |
| 4880 | return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type ); |
| 4881 | } |
| 4882 | |
| 4883 | if ( ! $resource_type ) { |
| 4884 | if ( is_taxonomy_hierarchical( $object_type ) ) { |
| 4885 | $resource_type = 'taxonomy'; |
| 4886 | } elseif ( post_type_exists( $object_type ) ) { |
| 4887 | $resource_type = 'post_type'; |
| 4888 | } |
| 4889 | } |
| Line | Code |
| 4903 | * |
| 4904 | * @since 3.1.0 |
| 4905 | * @since 4.1.1 Introduced the `$resource_type` parameter. |
| 4906 | * |
| 4907 | * @param int[] $ancestors An array of IDs of object ancestors. |
| 4908 | * @param int $object_id Object ID. |
| 4909 | * @param string $object_type Type of object. |
| 4910 | * @param string $resource_type Type of resource $object_type is. |
| 4911 | */ |
| 4912 | return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type ); |
| 4913 | } |
| 4914 | |
| 4915 | /** |
| 4916 | * Returns the term's parent's term ID. |
| 4917 | * |
| 4918 | * @since 3.1.0 |
| 4919 | * |
| 4920 | * @param int $term_id Term ID. |
| 4921 | * @param string $taxonomy Taxonomy name. |