WordPress at a glance
function is not described

WP_REST_Users_Controller::create_item() public WP 4.7.0

Creates a single user.

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

Return

WP_REST_Response/WP_Error. Response object on success, or WP_Error object on failure.

Usage

$WP_REST_Users_Controller = new WP_REST_Users_Controller();
$WP_REST_Users_Controller->create_item( $request );
$request(WP_REST_Request) (required)
Full details about the request.

Changelog

Since 4.7.0 Introduced.

Code of WP_REST_Users_Controller::create_item() WP 5.5.3

<?php
public function create_item( $request ) {
	if ( ! empty( $request['id'] ) ) {
		return new WP_Error(
			'rest_user_exists',
			__( 'Cannot create existing user.' ),
			array( 'status' => 400 )
		);
	}

	$schema = $this->get_item_schema();

	if ( ! empty( $request['roles'] ) && ! empty( $schema['properties']['roles'] ) ) {
		$check_permission = $this->check_role_update( $request['id'], $request['roles'] );

		if ( is_wp_error( $check_permission ) ) {
			return $check_permission;
		}
	}

	$user = $this->prepare_item_for_database( $request );

	if ( is_multisite() ) {
		$ret = wpmu_validate_user_signup( $user->user_login, $user->user_email );

		if ( is_wp_error( $ret['errors'] ) && $ret['errors']->has_errors() ) {
			$error = new WP_Error(
				'rest_invalid_param',
				__( 'Invalid user parameter(s).' ),
				array( 'status' => 400 )
			);

			foreach ( $ret['errors']->errors as $code => $messages ) {
				foreach ( $messages as $message ) {
					$error->add( $code, $message );
				}

				$error_data = $error->get_error_data( $code );

				if ( $error_data ) {
					$error->add_data( $error_data, $code );
				}
			}
			return $error;
		}
	}

	if ( is_multisite() ) {
		$user_id = wpmu_create_user( $user->user_login, $user->user_pass, $user->user_email );

		if ( ! $user_id ) {
			return new WP_Error(
				'rest_user_create',
				__( 'Error creating new user.' ),
				array( 'status' => 500 )
			);
		}

		$user->ID = $user_id;
		$user_id  = wp_update_user( wp_slash( (array) $user ) );

		if ( is_wp_error( $user_id ) ) {
			return $user_id;
		}

		$result = add_user_to_blog( get_site()->id, $user_id, '' );
		if ( is_wp_error( $result ) ) {
			return $result;
		}
	} else {
		$user_id = wp_insert_user( wp_slash( (array) $user ) );

		if ( is_wp_error( $user_id ) ) {
			return $user_id;
		}
	}

	$user = get_user_by( 'id', $user_id );

	/**
	 * Fires immediately after a user is created or updated via the REST API.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_User         $user     Inserted or updated user object.
	 * @param WP_REST_Request $request  Request object.
	 * @param bool            $creating True when creating a user, false when updating.
	 */
	do_action( 'rest_insert_user', $user, $request, true );

	if ( ! empty( $request['roles'] ) && ! empty( $schema['properties']['roles'] ) ) {
		array_map( array( $user, 'add_role' ), $request['roles'] );
	}

	if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
		$meta_update = $this->meta->update_value( $request['meta'], $user_id );

		if ( is_wp_error( $meta_update ) ) {
			return $meta_update;
		}
	}

	$user          = get_user_by( 'id', $user_id );
	$fields_update = $this->update_additional_fields_for_object( $user, $request );

	if ( is_wp_error( $fields_update ) ) {
		return $fields_update;
	}

	$request->set_param( 'context', 'edit' );

	/**
	 * Fires after a user is completely created or updated via the REST API.
	 *
	 * @since 5.0.0
	 *
	 * @param WP_User         $user     Inserted or updated user object.
	 * @param WP_REST_Request $request  Request object.
	 * @param bool            $creating True when creating a user, false when updating.
	 */
	do_action( 'rest_after_insert_user', $user, $request, true );

	$response = $this->prepare_item_for_response( $user, $request );
	$response = rest_ensure_response( $response );

	$response->set_status( 201 );
	$response->header( 'Location', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $user_id ) ) );

	return $response;
}