WordPress get_term_children() Function

The get_term_children() is a WordPress builtin function and it will merge all term children into a single array. This recursive function will merge all of the children of $term into the same array. Only useful for taxonomies which are hierarchical.

Will return an empty array if $term does not exist in $taxonomy.

Return Values:

array|WP_Error) Array of Term IDs. WP_Error returned if $taxonomy does not exist.

Examples 1: get_term_children() function:

<?php
$term_id = 10;
$taxonomy_name = 'products';
$term_children = get_term_children( $term_id, $taxonomy_name );

echo '<ul>';
foreach ( $term_children as $child ) {
	$term = get_term_by( 'id', $child, $taxonomy_name );
	echo '<li><a href="' . get_term_link( $child, $taxonomy_name ) . '">' . $term->name . '</a></li>';
}
echo '</ul>';
?>

<?php

$term_id = 10;

$taxonomy_name = 'products';

$term_children = get_term_children( $term_id, $taxonomy_name );

echo '<ul>';

foreach ( $term_children as $child ) {

$term = get_term_by( 'id', $child, $taxonomy_name );

echo '<li><a href="' . get_term_link( $child, $taxonomy_name ) . '">' . $term->name . '</a></li>';

}

echo '</ul>';

Output:

<ul> 
<li><a href="link_to_term_page">Term 1</a></li>
<li><a href="link_to_term_page">Term 2</a></li>
</ul>

<ul>

</ul>

Source File:

get_term_children() is located in wp-includes/taxonomy.php.

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WordPress get_term_children() Function

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