3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("" => 'nullish'); $o = (object)$a; var_dump($a, $o, $o->{''});
Output for 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [""]=> string(7) "nullish" } object(stdClass)#1 (1) { [""]=> string(7) "nullish" } string(7) "nullish"
Output for 7.0.0 - 7.0.33
Fatal error: Uncaught Error: Cannot access empty property in /in/NevIu:6 Stack trace: #0 {main} thrown in /in/NevIu on line 6
Process exited with code 255.
Output for 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Cannot access empty property in /in/NevIu on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.4
array(1) { [""]=> string(7) "nullish" } object(stdClass)#1 (1) { [":private"]=> string(7) "nullish" } string(7) "nullish"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
array(1) { [""]=> string(7) "nullish" } object(stdClass)(1) { [""]=> string(7) "nullish" } string(7) "nullish"

preferences:
291.26 ms | 402 KiB | 459 Q