laravel/framework — pull request #1349 by coolhome (2013-05-19 20:52:25+00:00)
Title: Input::only defaults to null for keys that doesn't exists.

Brought back default to null that was implemented pre 41ec1e0 commit.

```php
$input = Input::get('email', 'password');

//If password wasn't submitted then this will throw undefined variable
$password = Hash::make($input['password']);
```