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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 |
|---|---|
| 3192 | * @param string $object_type The type of object for which we'll be retrieving ancestors. |
| 3193 | * @return array of ancestors from lowest to highest in the hierarchy. |
| 3194 | */ |
| 3195 | function get_ancestors($object_id = 0, $object_type = '') { |
| 3196 | $object_id = (int) $object_id; |
| 3197 | |
| 3198 | $ancestors = array(); |
| 3199 | |
| 3200 | if ( empty( $object_id ) ) { |
| 3201 | return apply_filters('get_ancestors', $ancestors, $object_id, $object_type); |
| 3202 | } |
| 3203 | |
| 3204 | if ( is_taxonomy_hierarchical( $object_type ) ) { |
| 3205 | $term = get_term($object_id, $object_type); |
| 3206 | while ( ! is_wp_error($term) && ! empty( $term->parent ) && ! in_array( $term->parent, $ancestors ) ) { |
| 3207 | $ancestors[] = (int) $term->parent; |
| 3208 | $term = get_term($term->parent, $object_type); |
| 3209 | } |
| 3210 | } elseif ( null !== get_post_type_object( $object_type ) ) { |
| Line | Code |
| 3213 | $ancestors = $object->ancestors; |
| 3214 | else { |
| 3215 | while ( ! is_wp_error($object) && ! empty( $object->post_parent ) && ! in_array( $object->post_parent, $ancestors ) ) { |
| 3216 | $ancestors[] = (int) $object->post_parent; |
| 3217 | $object = get_post($object->post_parent); |
| 3218 | } |
| 3219 | } |
| 3220 | } |
| 3221 | |
| 3222 | return apply_filters('get_ancestors', $ancestors, $object_id, $object_type); |
| 3223 | } |
| 3224 | |
| 3225 | /** |
| 3226 | * Returns the term's parent's term_ID |
| 3227 | * |
| 3228 | * @since 3.1.0 |
| 3229 | * |
| 3230 | * @param int $term_id |
| 3231 | * @param string $taxonomy |