3v4l.org

run code in 300+ PHP versions simultaneously
<?php try { $a['a']++; } catch (Throwable $e) { var_dump($e); }
Output for 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
Warning: Undefined variable $a in /in/qWujQ on line 4 Warning: Undefined array key "a" in /in/qWujQ on line 4

preferences:
44.56 ms | 406 KiB | 5 Q