WP_REST_Widgets_Controller::save_widget() WordPress Method

The WP_REST_Widgets_Controller::save_widget() method is used to save a widget to the database. This method accepts an array of widget data and saves it to the database.

WP_REST_Widgets_Controller::save_widget( WP_REST_Request $request, string $sidebar_id ) #

Saves the widget in the request object.


Parameters

$request

(WP_REST_Request)(Required)Full details about the request.

$sidebar_id

(string)(Required)ID of the sidebar the widget belongs to.


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Return

(string|WP_Error) The saved widget ID.


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Source

File: wp-includes/rest-api/endpoints/class-wp-rest-widgets-controller.php

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protected function save_widget( $request, $sidebar_id ) {
    global $wp_widget_factory, $wp_registered_widget_updates;
 
    require_once ABSPATH . 'wp-admin/includes/widgets.php'; // For next_widget_id_number().
 
    if ( isset( $request['id'] ) ) {
        // Saving an existing widget.
        $id            = $request['id'];
        $parsed_id     = wp_parse_widget_id( $id );
        $id_base       = $parsed_id['id_base'];
        $number        = isset( $parsed_id['number'] ) ? $parsed_id['number'] : null;
        $widget_object = $wp_widget_factory->get_widget_object( $id_base );
        $creating      = false;
    } elseif ( $request['id_base'] ) {
        // Saving a new widget.
        $id_base       = $request['id_base'];
        $widget_object = $wp_widget_factory->get_widget_object( $id_base );
        $number        = $widget_object ? next_widget_id_number( $id_base ) : null;
        $id            = $widget_object ? $id_base . '-' . $number : $id_base;
        $creating      = true;
    } else {
        return new WP_Error(
            'rest_invalid_widget',
            __( 'Widget type (id_base) is required.' ),
            array( 'status' => 400 )
        );
    }
 
    if ( ! isset( $wp_registered_widget_updates[ $id_base ] ) ) {
        return new WP_Error(
            'rest_invalid_widget',
            __( 'The provided widget type (id_base) cannot be updated.' ),
            array( 'status' => 400 )
        );
    }
 
    if ( isset( $request['instance'] ) ) {
        if ( ! $widget_object ) {
            return new WP_Error(
                'rest_invalid_widget',
                __( 'Cannot set instance on a widget that does not extend WP_Widget.' ),
                array( 'status' => 400 )
            );
        }
 
        if ( isset( $request['instance']['raw'] ) ) {
            if ( empty( $widget_object->widget_options['show_instance_in_rest'] ) ) {
                return new WP_Error(
                    'rest_invalid_widget',
                    __( 'Widget type does not support raw instances.' ),
                    array( 'status' => 400 )
                );
            }
            $instance = $request['instance']['raw'];
        } elseif ( isset( $request['instance']['encoded'], $request['instance']['hash'] ) ) {
            $serialized_instance = base64_decode( $request['instance']['encoded'] );
            if ( ! hash_equals( wp_hash( $serialized_instance ), $request['instance']['hash'] ) ) {
                return new WP_Error(
                    'rest_invalid_widget',
                    __( 'The provided instance is malformed.' ),
                    array( 'status' => 400 )
                );
            }
            $instance = unserialize( $serialized_instance );
        } else {
            return new WP_Error(
                'rest_invalid_widget',
                __( 'The provided instance is invalid. Must contain raw OR encoded and hash.' ),
                array( 'status' => 400 )
            );
        }
 
        $form_data = array(
            "widget-$id_base" => array(
                $number => $instance,
            ),
            'sidebar'         => $sidebar_id,
        );
    } elseif ( isset( $request['form_data'] ) ) {
        $form_data = $request['form_data'];
    } else {
        $form_data = array();
    }
 
    $original_post    = $_POST;
    $original_request = $_REQUEST;
 
    foreach ( $form_data as $key => $value ) {
        $slashed_value    = wp_slash( $value );
        $_POST[ $key ]    = $slashed_value;
        $_REQUEST[ $key ] = $slashed_value;
    }
 
    $callback = $wp_registered_widget_updates[ $id_base ]['callback'];
    $params   = $wp_registered_widget_updates[ $id_base ]['params'];
 
    if ( is_callable( $callback ) ) {
        ob_start();
        call_user_func_array( $callback, $params );
        ob_end_clean();
    }
 
    $_POST    = $original_post;
    $_REQUEST = $original_request;
 
    if ( $widget_object ) {
        // Register any multi-widget that the update callback just created.
        $widget_object->_set( $number );
        $widget_object->_register_one( $number );
 
        /*
         * WP_Widget sets `updated = true` after an update to prevent more than one widget
         * from being saved per request. This isn't what we want in the REST API, though,
         * as we support batch requests.
         */
        $widget_object->updated = false;
    }
 
    /**
     * Fires after a widget is created or updated via the REST API.
     *
     * @since 5.8.0
     *
     * @param string          $id         ID of the widget being saved.
     * @param string          $sidebar_id ID of the sidebar containing the widget being saved.
     * @param WP_REST_Request $request    Request object.
     * @param bool            $creating   True when creating a widget, false when updating.
     */
    do_action( 'rest_after_save_widget', $id, $sidebar_id, $request, $creating );
 
    return $id;
}


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Changelog

Changelog
VersionDescription
5.8.0Introduced.

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