3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump((object) ['1' => 'foo']); var_dump((object) ["foo" => '\0']);
Output for 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
object(stdClass)#1 (1) { ["1"]=> string(3) "foo" } object(stdClass)#1 (1) { ["foo"]=> string(2) "\0" }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25
object(stdClass)#1 (1) { [1]=> string(3) "foo" } object(stdClass)#1 (1) { ["foo"]=> string(2) "\0" }

preferences:
151.03 ms | 402 KiB | 198 Q