I need someone Help.

Hi everybody! I’m Johnny Ufabet, CI have the following native rules that are available to use; alpha, alpha_numeric, alpha_numeric_spaces, alpha_dash and so on... but what if I want to validate a form field for a title or subject with the following common characters; ? ! $ & @
Is there a way to add those to the following native rules; alpha_numeric, alpha_numeric_spaces?
Thank You!

regex

https://codeigniter4.github.io/userguide...stom-rules

Add your new class rule or use regex_match[/regex/] in rules