3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = new stdClass; $a->a = new stdClass; $a->a->a = new stdClass; $a->a->a->a = 'a'; // $a = [ 'a' => [ 'a' => [ 'a' => 'a' ] ] ]; $b = $a->a; var_dump($b); var_dump($b->a = 'c'); var_dump($a);
Output for 5.0.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
object(stdClass)#2 (1) { ["a"]=> object(stdClass)#3 (1) { ["a"]=> string(1) "a" } } string(1) "c" object(stdClass)#1 (1) { ["a"]=> object(stdClass)#2 (1) { ["a"]=> string(1) "c" } }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.4.9
object(stdClass)(1) { ["a"]=> object(stdClass)(1) { ["a"]=> string(1) "a" } } string(1) "c" object(stdClass)(1) { ["a"]=> object(stdClass)(1) { ["a"]=> object(stdClass)(1) { ["a"]=> string(1) "a" } } }