Prompt cannot find method

Question

'require'=>'require',
'chsAlphaNum'=>'chsAlphaNum'
'email'=>'email', an error will be reported when running and the method cannot be found. Comment out these few Just one will do. Why is this happening? It can be used in learning videos.

call_user_func_array() expects parameter 1 to be a valid callback, class 'app\Home\validate\User' does not have a method 'chsAlphaNum'

Answer 1

The prompt has come out, there is no chsAlphaNum method, please see where it is defined