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PHP自定义异常处理器的几种使用方法

WBOY
Release: 2016-06-13 11:09:23
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处理异常在

以下4段代码为我在waylife项目中的简单应用(非生产环境),不健壮也不美化,但该SNS项目早已经夭折。

1、异常类的层级关系:

  1. class NotFoundException extends Exception{}  
  2. class InputException extends Exception{}  
  3. class DBException extends Exception{} 


2、配置未捕捉异常的处理器:

  1. function exception_uncaught_handler(Exception $e) {  
  2. header('Content-type:text/html; charset=utf-8');  
  3. if ($e instanceof NotFoundException)  
  4. exit($e->getMessage());  
  5. elseif ($e instanceof DBException)  
  6. exit($e->getMessage());  
  7. else  
  8. exit($e->getMessage());  
  9. }  
  10. set_exception_handler('exception_uncaught_handler');  

3、在数据库连接代码,手动抛出DBException异常但未使用try…catch进行捕获处理,该异常将被PHP自定义异常处理器exception_uncaught_handler()函数处理:

  1. $this->resConn = mysql_connect ($CONFIGS['db_host'], $CONFIGS['db_user'], $CONFIGS['db_pwd']);  
  2. if (false == is_resource($this->resConn))  
  3. throw new DBException('数据库连接失败。'.mysql_error($this->resConn)); 


4、业务逻辑一瞥:

  1. if (0 != strcmp($curAlbum->interest_id, $it))  
  2. throw new NotFoundException('很抱歉,你所访问的相册不存在');  

以上就是PHP自定义异常处理器的具体使用方法。


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