Source
File: wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
public function get_items( $request ) {
// Retrieve the list of registered collection query parameters.
$registered = $this->get_collection_params();
/*
* This array defines mappings between public API query parameters whose
* values are accepted as-passed, and their internal WP_Query parameter
* name equivalents (some are the same). Only values which are also
* present in $registered will be set.
*/
$parameter_mappings = array(
'exclude' => 'exclude',
'include' => 'include',
'order' => 'order',
'per_page' => 'number',
'search' => 'search',
'roles' => 'role__in',
'slug' => 'nicename__in',
);
$prepared_args = array();
/*
* For each known parameter which is both registered and present in the request,
* set the parameter's value on the query $prepared_args.
*/
foreach ( $parameter_mappings as $api_param => $wp_param ) {
if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
$prepared_args[ $wp_param ] = $request[ $api_param ];
}
}
if ( isset( $registered['offset'] ) && ! empty( $request['offset'] ) ) {
$prepared_args['offset'] = $request['offset'];
} else {
$prepared_args['offset'] = ( $request['page'] - 1 ) * $prepared_args['number'];
}
if ( isset( $registered['orderby'] ) ) {
$orderby_possibles = array(
'id' => 'ID',
'include' => 'include',
'name' => 'display_name',
'registered_date' => 'registered',
'slug' => 'user_nicename',
'include_slugs' => 'nicename__in',
'email' => 'user_email',
'url' => 'user_url',
);
$prepared_args['orderby'] = $orderby_possibles[ $request['orderby'] ];
}
if ( isset( $registered['who'] ) && ! empty( $request['who'] ) && 'authors' === $request['who'] ) {
$prepared_args['who'] = 'authors';
} elseif ( ! current_user_can( 'list_users' ) ) {
$prepared_args['has_published_posts'] = get_post_types( array( 'show_in_rest' => true ), 'names' );
}
if ( ! empty( $prepared_args['search'] ) ) {
$prepared_args['search'] = '*' . $prepared_args['search'] . '*';
}
/**
* Filters WP_User_Query arguments when querying users via the REST API.
*
* @link https://developer.wordpress.org/reference/classes/wp_user_query/
*
* @since 4.7.0
*
* @param array $prepared_args Array of arguments for WP_User_Query.
* @param WP_REST_Request $request The current request.
*/
$prepared_args = apply_filters( 'rest_user_query', $prepared_args, $request );
$query = new WP_User_Query( $prepared_args );
$users = array();
foreach ( $query->results as $user ) {
$data = $this->prepare_item_for_response( $user, $request );
$users[] = $this->prepare_response_for_collection( $data );
}
$response = rest_ensure_response( $users );
// Store pagination values for headers then unset for count query.
$per_page = (int) $prepared_args['number'];
$page = ceil( ( ( (int) $prepared_args['offset'] ) / $per_page ) + 1 );
$prepared_args['fields'] = 'ID';
$total_users = $query->get_total();
if ( $total_users < 1 ) {
// Out-of-bounds, run the query again without LIMIT for total count.
unset( $prepared_args['number'], $prepared_args['offset'] );
$count_query = new WP_User_Query( $prepared_args );
$total_users = $count_query->get_total();
}
$response->header( 'X-WP-Total', (int) $total_users );
$max_pages = ceil( $total_users / $per_page );
$response->header( 'X-WP-TotalPages', (int) $max_pages );
$base = add_query_arg( urlencode_deep( $request->get_query_params() ), rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ) );
if ( $page > 1 ) {
$prev_page = $page - 1;
if ( $prev_page > $max_pages ) {
$prev_page = $max_pages;
}
$prev_link = add_query_arg( 'page', $prev_page, $base );
$response->link_header( 'prev', $prev_link );
}
if ( $max_pages > $page ) {
$next_page = $page + 1;
$next_link = add_query_arg( 'page', $next_page, $base );
$response->link_header( 'next', $next_link );
}
return $response;
}