WP_REST_Users_Controller::get_user( int $id ): WP_User|WP_Error

Source

protected function get_user( $id ) {
	$error = new WP_Error(
		'rest_user_invalid_id',
		__( 'Invalid user ID.' ),
		array( 'status' => 404 )
	);

	if ( (int) $id <= 0 ) {
		return $error;
	}

	$user = get_userdata( (int) $id );
	if ( empty( $user ) || ! $user->exists() ) {
		return $error;
	}

	if ( is_multisite() && ! is_user_member_of_blog( $user->ID ) ) {
		return $error;
	}

	return $user;
}

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