3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 'bar'; $bar = ['foo' => & $foo]; $baz = (object) $bar; function fillReturnWithClassAttributes ($var) { $clone = (array) $var; unset($clone->foo); return $clone; } $return = fillReturnWithClassAttributes($baz); $baz->foo = 'tab'; var_dump($return);
Output for 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(1) { ["foo"]=> &string(3) "tab" }

preferences:
86.68 ms | 1642 KiB | 4 Q