Laravel form input integer length

Question

In Laravel form input validation, you can specify a minimum and a maximum length of a given input field.

$inputRules = [
    'postCode' => 'min:3|max:8'
];

Validation outcome

• 'BA45TZ' = true
• 'FF' = false
• 'GH22 55XYZ' = false

However if I do the same for a number, it will validate whether the input is less than or greater than the input, then return on that.

$inputRules = [
    'cv2' => 'min:3|max:4'
];

Validation outcome

• '586' = false
• '4' = true
• '2' = false
• '3' = true

I actually want to validate a numbers length not it's numerical value. I can't figure out how to do this. Google has been no help, or I am not searching the right thing.

Anybody had any experience with this?

EDIT: I have answered my own question. I had missed Laravels digits_between.

Answer 1

Like an idiot, I missed Laravels digits_between validator rule. I swear I had scoured those rules, but here we are.

Thank you everyone for your help.

$inputRules = [
    'cv2' => 'required|numeric|digits_between:3,4'
];

Answer 2

That's the expected behavior of Laravel's size, min and max validations. You can't change it.

For string data, value corresponds to the number of characters. For numeric data, value corresponds to a given integer value. For files, size corresponds to the file size in kilobytes.

To solve this you have to create a custom validation rule. Something like this:

Validator::extend('min_length', function($attribute, $value, $parameters){
    return strlen($value) >= $parameters[0];
});

Validator::extend('max_length', function($attribute, $value, $parameters){
    return strlen($value) <= $parameters[0];
});

And you can use them in the same way:

'cv2' => 'min_length:3|max_length:4'