3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = '111'; $array = ['x' => 'x', 'y' => 'y']; $array = 'x'; echo $$array['x'];
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/5GmKS:5 Stack trace: #0 {main} thrown in /in/5GmKS on line 5
Process exited with code 255.
Output for 7.1.0, 7.3.24 - 7.3.33, 7.4.12 - 7.4.33
Warning: Illegal string offset 'x' in /in/5GmKS on line 5 1

preferences:
107.64 ms | 402 KiB | 115 Q