myexception.php

这是一个专门用来描述PHP5 OOP的电子书

<?
//MyException.php
//这里定义了相关异常.为以后的扩展准备好了丰富的异常分类.
  class UsernameException extends  Exception {}  
  class UsernameInvalidateException extends UsernameException {}  
  class UsernameLengthMinException extends UsernameException {}
  class UsernameLengthMaxException extends UsernameException {}
  
  class PasswordException extends Exception {}
  class PasswordInvalidateException extends PasswordException {}  
  class PasswordLengthMinException extends PasswordException  {}
  class PasswordLengthMaxException extends PasswordException  {} 
?>