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Summery Summery
Merge all term children into a single array of their IDs.
Syntax Syntax
Description Description
This recursive function will merge all of the children of $term into the same array of term IDs. Only useful for taxonomies which are hierarchical.
Will return an empty array if $term does not exist in $taxonomy.
Parameters Parameters
- $term_id
-
(Required) ID of Term to get children.
- $taxonomy
-
(Required) Taxonomy Name.
Return Return
(array|WP_Error) List of Term IDs. WP_Error returned if $taxonomy does not exist.
Source Source
File: wp-includes/taxonomy.php
break;
case 'term_taxonomy_id':
$args['term_taxonomy_id'] = $value;
unset( $args['taxonomy'] );
break;
default:
return false;
}
$terms = get_terms( $args );
if ( is_wp_error( $terms ) || empty( $terms ) ) {
return false;
}
$term = array_shift( $terms );
// In the case of 'term_taxonomy_id', override the provided `$taxonomy` with whatever we find in the DB.
if ( 'term_taxonomy_id' === $field ) {
$taxonomy = $term->taxonomy;
}
return get_term( $term, $taxonomy, $output, $filter );
}
/**
* Merge all term children into a single array of their IDs.
*
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Changelog Changelog
| Version | Description |
|---|---|
| 2.3.0 | Introduced. |