Problems with extending CI_Form_validation

You're doing it wrong. Try this:

https://codeigniter.com/user_guide/libra...-as-a-rule

I'm kind of confuse with this user guide

I tried this [doesn't work]

PHP Code:

$this->form_validation->set_rules('email', '', array(
        array($this->AdvancedValidation, 'scanEmail')
)); 


The Error is
Log

Code:

ERROR - 2017-07-30 11:19:48 --> Severity: Warning --> preg_match() expects parameter 2 to be string, array given /Applications/XAMPP/xamppfiles/htdocs/xyz/system/libraries/Form_validation.php 693
ERROR - 2017-07-30 11:19:48 --> Severity: Warning --> method_exists() expects parameter 2 to be string, array given /Applications/XAMPP/xamppfiles/htdocs/xyz/system/libraries/Form_validation.php 749
ERROR - 2017-07-30 11:19:48 --> Severity: Warning --> function_exists() expects parameter 1 to be string, array given /Applications/XAMPP/xamppfiles/htdocs/xyz/system/libraries/Form_validation.php 753

validation_errors()

Code:

bool(false) string(101) "
Unable to access an error message corresponding to your field name email.(Anonymous function)
"

However, when I use Anonymous Function it work which I'm not looking for

PHP Code:

$this->form_validation->set_rules('email', '', array(
 function($value)
 {
 return TRUE;
 }
));