Online PHP editor | output for ulD7M

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 5 Fatal error: Uncaught Error: Undefined constant "length" in /in/ulD7M:7 Stack trace: #0 {main} thrown in /in/ulD7M on line 7
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: 5 Warning: Use of undefined constant length - assumed 'length' (this will throw an Error in a future version of PHP) in /in/ulD7M on line 7 Notice: Array to string conversion in /in/ulD7M on line 7 Arraylength
Output for 7.3.32 - 7.3.33: 5 Warning: Use of undefined constant length - assumed 'length' (this will throw an Error in a future version of PHP) in /in/ulD7M on line 7 Arraylength
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25: 5 Notice: Use of undefined constant length - assumed 'length' in /in/ulD7M on line 7 Notice: Array to string conversion in /in/ulD7M on line 7 Arraylength
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: 5 Notice: Use of undefined constant length - assumed 'length' in /in/ulD7M on line 7 Arraylength