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get_category_children( int $id, string $before = '/', string $after = '', array $visited = array() )

This function has been deprecated. Use get_term_children() instead.

Retrieve category children list separated before and after the term IDs.

Description

See also

Parameters

$id

(int) (Required) Category ID to retrieve children.

$before

(string) (Optional) Prepend before category term ID.

Default value: '/'

$after

(string) (Optional) Append after category term ID.

Default value: ''

$visited

(array) (Optional) Category Term IDs that have already been added.

Default value: array()

Return

(string)

Source

File: wp-includes/deprecated.php

function get_category_children( $id, $before = '/', $after = '', $visited = array() ) {
	_deprecated_function( __FUNCTION__, '2.8.0', 'get_term_children()' );
	if ( 0 == $id )
		return '';

	$chain = '';
	/** TODO: consult hierarchy */
	$cat_ids = get_all_category_ids();
	foreach ( (array) $cat_ids as $cat_id ) {
		if ( $cat_id == $id )
			continue;

		$category = get_category( $cat_id );
		if ( is_wp_error( $category ) )
			return $category;
		if ( $category->parent == $id && !in_array( $category->term_id, $visited ) ) {
			$visited[] = $category->term_id;
			$chain .= $before.$category->term_id.$after;
			$chain .= get_category_children( $category->term_id, $before, $after );
		}
	}
	return $chain;
}

Changelog

Version Description
2.8.0 Use get_term_children()
1.2.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/get_category_children