3v4l.org

run code in 300+ PHP versions simultaneously
<?php $id=array(1,2,3); $age = array(); $age[$id]="35"; $age[$id]="37"; $age[$id]="43"; echo $age[$id[0]];
Output for 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: Cannot access offset of type array on array in /in/FTYI4:4 Stack trace: #0 {main} thrown in /in/FTYI4 on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
Fatal error: Uncaught TypeError: Illegal offset type in /in/FTYI4:4 Stack trace: #0 {main} thrown in /in/FTYI4 on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Warning: Illegal offset type in /in/FTYI4 on line 4 Warning: Illegal offset type in /in/FTYI4 on line 5 Warning: Illegal offset type in /in/FTYI4 on line 6 Notice: Undefined offset: 1 in /in/FTYI4 on line 8
Output for 7.3.32 - 7.3.33
Warning: Illegal offset type in /in/FTYI4 on line 4 Warning: Illegal offset type in /in/FTYI4 on line 5 Warning: Illegal offset type in /in/FTYI4 on line 6
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
Warning: Illegal offset type in /in/FTYI4 on line 4 Warning: Illegal offset type in /in/FTYI4 on line 5 Warning: Illegal offset type in /in/FTYI4 on line 6 Notice: Undefined offset: 1 in /in/FTYI4 on line 8

preferences:
229.2 ms | 402 KiB | 336 Q