Codeigniter Passing Extra Parameters to Custom Validation Rule

Maybe something like this:

PHP Code:

$second_param = 'whatever';

$rules = [
    [
        'field' => 'email',
        'label' => 'Email',
        'rules' => [
            'required',
            'trim',
            'valid_email',
            'xss_clean',
            [
                'email_exists', 
                function( $str ) use ( $second_param ){
                    return $this->m_user->email_exists( $str, $second_param ); 
                }
            ]
        ]
    ]
]; 


It works. Thanks a lot sir.