WordPress at a glance
function is not described

WC_API_Resource::filter_response_fields() public WC 2.1

Restrict the fields included in the response if the request specified certain only certain fields should be returned

{} It's a method of the class: WC_API_Resource{}

No Hooks.

Return

Array. response data

Usage

$WC_API_Resource = new WC_API_Resource();
$WC_API_Resource->filter_response_fields( $data, $resource, $fields );
$data(array) (required)
the response data
$resource(object) (required)
the object that provided the response data, e.g. WC_Coupon or WC_Order
$fields (required)
-

Changelog

Since 2.1 Introduced.

Code of WC_API_Resource::filter_response_fields() WC 5.0.0

<?php
public function filter_response_fields( $data, $resource, $fields ) {

	if ( ! is_array( $data ) || empty( $fields ) ) {
		return $data;
	}

	$fields = explode( ',', $fields );
	$sub_fields = array();

	// get sub fields
	foreach ( $fields as $field ) {

		if ( false !== strpos( $field, '.' ) ) {

			list( $name, $value ) = explode( '.', $field );

			$sub_fields[ $name ] = $value;
		}
	}

	// iterate through top-level fields
	foreach ( $data as $data_field => $data_value ) {

		// if a field has sub-fields and the top-level field has sub-fields to filter
		if ( is_array( $data_value ) && in_array( $data_field, array_keys( $sub_fields ) ) ) {

			// iterate through each sub-field
			foreach ( $data_value as $sub_field => $sub_field_value ) {

				// remove non-matching sub-fields
				if ( ! in_array( $sub_field, $sub_fields ) ) {
					unset( $data[ $data_field ][ $sub_field ] );
				}
			}
		} else {

			// remove non-matching top-level fields
			if ( ! in_array( $data_field, $fields ) ) {
				unset( $data[ $data_field ] );
			}
		}
	}

	return $data;
}