3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(E_WARNING); $a=[]; $a[1]="foo"; $a[(new StdClass())]="bar"; var_dump($a);
Output for 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

Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Illegal offset type in /in/AlgFo on line 6 array(1) { [1]=> string(3) "foo" }
preferences:
186.95 ms | 479 KiB | 5 Q