Codeigniter form_validation create custom rule/filter
问题 Codeigniters form_validation is great, however I need a custom filter that is specifically alpha space dash and apostrophe/single quote but.. they don't have that specifically in there existing set, so I am wondering how could I go about creating my own rule/filter and adding it to form_validation. 回答1: Callbac ks are your friend You'll just just a custom callback - and put a regex in there that does whatever rule you want. 回答2: Here is some documentation for CodeIgniter's form validation