php - Error:Declaration of ProfileControllerSetting::cancel() should be compatible with JControllerForm::cancel($key = NULL) -

hey new in joomla , making component called profile. getting error in folder controllers/setting.php. here's code;

class profilecontrollersetting extends jcontrollerform {

 function save(){     parent::save();     if($this->task=='save')          $this->setredirect('index.php?option=com_profile');         }   function cancel(){          $this->setredirect('index.php?option=com_profile');   }  } 

the error coming is:strict standards: declaration of profilecontrollersetting::cancel() should compatible jcontrollerform::cancel($key = null)

and

strict standards: declaration of profilecontrollersetting::save() should compatible jcontrollerform::save($key = null, $urlvar = null)  

please me .

how interpreter telling already, yo have parameterise functions. try like:

class profilecontrollersetting extends jcontrollerform {       public function save($key = null){         parent::save();         if($this->task=='save')              $this->setredirect('index.php?option=com_profile');     }       public function cancel($key = null, $urlvar = null){              $this->setredirect('index.php?option=com_profile');     } } 

since cannot overload php-functions extending class jcontrollerform. have follow definition of function load , save declared in jcontrollerform.