Laravel Validation for integers or specific word

Question

I'm creating a validation rule where location attribute can have any integer or a word "all" value.
For integer validation I use this rule:

'location' => 'required|integer'

and for a particular word I can use this rule:

'location' => ['required', Rule::in([all])] 

How can apply both of rules together so that location can either be any integer or the word "all"? Can regex be of any help here?

Answer 1

You could use a regex rule without required (if you don't mind a separate error message for empty fields):

'location' => ['regex:/^(?:\d+|all)$/']

This means the input value should be either \d or all.