1--TEST--
2Bug #71334: Cannot access array keys while uksort()
3--FILE--
4<?php
5
6class myClass
7{
8    private $a = [
9        'foo-test' => [1],
10        '-' => [2],
11        'bar-test' => [3]
12    ];
13
14    private function _mySort($x, $y)
15    {
16        if (!isset($this->a[$x])) {
17            throw new Exception('Missing X: "' . $x . '"');
18        }
19
20        if (!isset($this->a[$y])) {
21            throw new Exception('Missing Y: "' . $y . '"');
22        }
23
24        return $x <=> $y;
25    }
26
27    public function __construct()
28    {
29        uksort($this->a, [$this, '_mySort']);
30    }
31}
32
33new myClass();
34echo "Done";
35
36?>
37--EXPECT--
38Done
39