Best way to initialize an (empty) array in PHP

In certain other languages ([ActionScript 3][1] for example), it has been noted that initializing a new array is faster if done like this `var foo = []` rather than `var foo = new Array()` for reasons of object creation and instantiation. Are there are any equivalences in PHP? class Foo { private $arr = array(); // Is there another / better way? } [1]: https://en.wikipedia.org/wiki/ActionScript