Laravel 5.1 Modify input before form request validation

Question

Is there a way to modify input fields inside a form request class before the validation takes place?

I want to modify some input date fields as follows but it doesn

Answer 1

The FormRequest has a method validationData() that return the data to validate, so i'm overriding it in my form request:

all(),
            [
                'number' => preg_replace("/[^0-9]/", "", $this->number)
            ]
        );
    }
    ...
}

It work fine i'm using Laravel 5.4 :)