Как вывести переменную по условию?

Question

[Максим Притчин]

Есть такой код

<?php 
require_once('./assets/config/config.php');

$connect = mysqli_connect($config['bd_host'], $config['bd_user'], $config['bd_password'], $config['bd_name']) or die(mysqli_error($connect));



if (isset($_POST['auth_login'])) 
{
	if (empty($_POST['auth_login'])) 
	{
		$auth_error = "Введите логин";
	}
	elseif (empty($_POST['auth_password']))
	{
		$auth_error = "Введите пароль";
	}
	else
	{
		$login = $_POST['auth_login'];
		$password = $_POST['auth_password'];
		$query = mysqli_query($connect, "SELECT `id` FROM `user_login` WHERE `nickname` = '$login' AND `password` = '$password'");
		$answer = mysqli_fetch_array($query);
		if (empty($answer['id'])) 
		{
		 	$auth_error = 'Введенные данные не верны';
		}
		else
		{
			$_SESSION['login'] = $login;
			$_SESSION['id'] = $answer['id'];
			$_SESSION['logged'] = 1;
			$id_sessian = $_SESSION['id'];
			$query = mysqli_query($connect, "UPDATE `accounts`.`user_login` SET `logged` = '1' WHERE `user_login`.`id` = '$id_sessian'");
			$auth_error = 'Вы успешно вошли';

		}
	}
}
elseif ($id_sessian == '1') {
	$logout = '
				<button class="btn btn-outline-success authorization" data-toggle="modal" data-target="#sign-in">					
					<i class="fa fa-sign-in" aria-hidden="true"></i> Выйти
				</button>';
}
else
{
	$logout = '
				<button class="btn btn-outline-success authorization" data-toggle="modal" data-target="#sign-in">					
					<i class="fa fa-sign-in" aria-hidden="true"></i> Войти
				</button>
				<button class="btn btn-outline-success registration ml-2" data-toggle="modal" data-target="#sign-up">					
					<i class="fa fa-user-plus" aria-hidden="true"></i>Регистрация
				</button>';
}

$auth_error = isset($auth_error) ? $auth_error : NULL;


?>

При исполнении elseif условии не выводиться переменная

elseif ($id_sessian == '1') {
	$logout = '
				<button class="btn btn-outline-success authorization" data-toggle="modal" data-target="#sign-in">					
					<i class="fa fa-sign-in" aria-hidden="true"></i> Выйти
				</button>';
}