This reverts commit a5846fa2, reversing
changes made to 2a6e064a.

```getValue``` didn't check if the property on an object exists so wouldn't return the default value.

Fixed

issue #3026

issue #2852

added a missing argument

Fixes #802: Added support for retrieving sub-array element or child object property through `ArrayHelper::getValue()`

Test code
```php
$orders = $this->getSort()->getOrders();
ArrayHelper::multisort($data, array_keys($orders), array_values($orders));
```

Appended newlines to every PHP document that did not have a newline as the last character in the file.