1--TEST--
2Array addition is not commutative -- do not swap operands
3--FILE--
4<?php
5
6$array = [1, 2, 3];
7$array = [4, 5, 6] + $array;
8var_dump($array);
9
10?>
11--EXPECT--
12array(3) {
13  [0]=>
14  int(4)
15  [1]=>
16  int(5)
17  [2]=>
18  int(6)
19}
20