Custom Validation

Validation.php

Validator::extend('different_if_present', function($attribute, $value, $parameters, $validator) {
    $otherValue = Arr::get($validator->getData(), $parameters[0]);

    return $value !== $otherValue;
});
Validator::replacer('different_if_present', function($message, $attribute, $rule, $parameters) {
    return str_replace(':other', $parameters[0], $message);
});


// How to use
'address1' => 'required|different_if_present:address2',
'address2' => 'different_if_present:address1',