One possible solution would to use regex.
'phone' => 'required|regex:/(01)[0-9]{9}/'
This will check the input starts with 01 and is followed by 9 numbers. By using regex you don’t need the numeric or size validation rules.
If you want to reuse this validation method else where, it would be a good idea to create your own validation rule for validating phone numbers.
Docs: Custom Validation
In your AppServiceProvider‘s boot method:
Validator::extend('phone_number', function($attribute, $value, $parameters)
{
return substr($value, 0, 2) == '01';
});
This will allow you to use the phone_number validation rule anywhere in your application, so your form validation could be:
'phone' => 'required|numeric|phone_number|size:11'
In your validator extension you could also check if the $value is numeric and 11 characters long.