我不确定在控制器和型号之间是否建议进行这种类型的通信.我将使用一个简单的示例和两种方法来描述它：

选项1(模型抛出异常,控制器捕获它)：

class Controller {
  PRivate $model;

  public function save($data) {
     try {
         $this->;model->save($data); 
     } catch (Exception $e) {  
         // handle exception
     }
  }
}

class Model {
  public function save($data) {
     // Call to internal function to save data in BD
     if (! $this->_save($data)) throw new Exception('Error saving data');
  }
}

选项2(控制器完全处理异常)：

class Controller {
  private $model;

  public function save($data) {
     try {
         if (! $this->model->save($data)) throw new Exception('Error saving data'); 
     } catch (Exception $e) { 
         // handle exception
     }
  }
}

class Model {
  public function save($data) {
     // Call to internal function to save data in BD
     if (! $this->_save($data)) return false;
  }
}

**

一些回复后编辑：

**

这些是根据您的建议解决它的其他方法.我希望不要让事情变得太复杂.

选项3(模型完全处理异常,正如Ray所说.KingCrunch还建议在模型中做得更好)

class Controller {
  private $model;

  public function save($data) {

     if (! $this->model->save($data)) {
         // possible action: redirect to the form wITh an error message
     }

  }
}

class Model {
  public function save($data) {
     try {
         if (! $this->_save($data)) throw new Exception('Error saving data'); 
     } catch (Exception $e) { 
         // handle exception
         return false;
     }
     return true; 
  }
}

选项4(控制器获取模型抛出的自定义子异常,如shiplu.mokadd.im所说.)

class Controller {
  private $model;

  public function save($data) {
     try {
         $this->model->save($data); 
     } catch (Exception $e) {  
         if ($e instanceof ValidationException) {
            // handle validation error
         }
         elseif ($e instanceof DBStorageException) {
            // handle DB error
         }
     }
  }
}

class Model {
  public function save($data) {
     if (! $this->_validate($data)) {
        throw new ValidationException ('Validation error');
     }
     if (! $this->_save($data)) {
        throw new DBStorageException ('Storage error');
     }
  }
}