public function has($name)
    {
        $value = $this->get($name);

        return isset($value) ? $value : false;
    }
public function has($name)
    {
        $value = $this->get($name);

        return isset($value) ? $value : false;
    }
public function has ( $ name ) { $ value = $ this -> get ( $ name ) ; return isset ( $ value ) ? $ value : false ; }
check the value is exists

@return mixed
check the value is exists