1--TEST-- 2Covariant return-by-ref constraints 3--FILE-- 4<?php 5 6class A implements ArrayAccess { 7 public $foo = array(); 8 9 public function &offsetGet($n): mixed { 10 return $this->foo[$n]; 11 } 12 13 public function offsetSet($n, $v): void { 14 } 15 public function offsetUnset($n): void { 16 } 17 public function offsetExists($n): bool { 18 } 19} 20 21$a = new A; 22 23$a['foo']['bar'] = 2; 24 25var_dump($a); 26 27?> 28--EXPECT-- 29object(A)#1 (1) { 30 ["foo"]=> 31 array(1) { 32 ["foo"]=> 33 array(1) { 34 ["bar"]=> 35 int(2) 36 } 37 } 38} 39
