3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr0 = new ArrayObject(['a' => 'A']); $arr1 = new ArrayObject(['x' => 'X']); var_export($arr0 + $arr1);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.14
Fatal error: Uncaught TypeError: Unsupported operand types: ArrayObject + ArrayObject in /in/v1GqI:5 Stack trace: #0 {main} thrown in /in/v1GqI on line 5
Process exited with code 255.

preferences:
61.16 ms | 406 KiB | 5 Q