How do I set validation rules in codeIgniter if the inputs have same validation rules like in this case its required.
$this->form_validation->set_rules('username', 'Username', 'required');
$this->form_validation->set_rules('password', 'Password', 'required');
$this->form_validation->set_rules('firstname', 'Firstname', 'required');
$this->form_validation->set_rules('middlename', 'Middlename', 'required');
$this->form_validation->set_rules('lastname', 'Lastname', 'required');