UserException.php

<?php
/**
 * UserException class file.
 *
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\base;

/**
 * UserException is the base class for exceptions that are meant to be shown to end users.
 * Such exceptions are often caused by mistakes of end users.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class UserException extends Exception
{
}