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

$this->validate($request, [
    'location' => [
        'required',
        'max:255',
        function ($attribute, $value, $fail) {
            if( is_int( $value ) || 'all' === $value ) {
                return true;
            } else {
                $fail($attribute.' is invalid.');
            }
        },
    ],
]);

But keep in mind: If you send integer via form – you will receive string. And checking is_int( $value ) will not be passed.