1--TEST--
2usort() is stable
3--FILE--
4<?php
5
6$array = range(0, 10000);
7usort($array, function($a, $b) {
8    // Everything is equal!
9    return 0;
10});
11var_dump($array === range(0, 10000));
12
13?>
14--EXPECT--
15bool(true)
16