3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { protected $aa = 1; } class b extends a { protected $aa = 10; function foo() { $c = new c; $c->foo($this); } } class c extends a { function foo(b $b) { print_r($b->aa); } } $b = new b; $b->foo();
Output for 8.4.12
10
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.11
Fatal error: Uncaught Error: Cannot access protected property b::$aa in /in/abVRT:21 Stack trace: #0 /in/abVRT(13): c->foo(Object(b)) #1 /in/abVRT(26): b->foo() #2 {main} thrown in /in/abVRT on line 21
Process exited with code 255.
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28
Fatal error: Cannot access protected property b::$aa in /in/abVRT on line 21
Process exited with code 255.
preferences:
119.44 ms | 408 KiB | 5 Q