Online PHP editor | output for Hcag9

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: Warning: Undefined variable $ar in /in/Hcag9 on line 3 Fatal error: Uncaught TypeError: ArrayObject::__construct(): Argument #1 ($array) must be of type array, null given in /in/Hcag9:3 Stack trace: #0 /in/Hcag9(3): ArrayObject->__construct(NULL) #1 {main} thrown in /in/Hcag9 on line 3
Process exited with code 255.
Output for 7.0.20, 7.1.5 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined variable: ar in /in/Hcag9 on line 3 Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object in /in/Hcag9:3 Stack trace: #0 /in/Hcag9(3): ArrayObject->__construct(NULL) #1 {main} thrown in /in/Hcag9 on line 3
Process exited with code 255.
Output for 7.3.32 - 7.3.33: Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object in /in/Hcag9:3 Stack trace: #0 /in/Hcag9(3): ArrayObject->__construct(NULL) #1 {main} thrown in /in/Hcag9 on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.14, 7.1.0: Notice: Undefined variable: ar in /in/Hcag9 on line 3 Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object, using empty array instead in /in/Hcag9:3 Stack trace: #0 /in/Hcag9(3): ArrayObject->__construct(NULL) #1 {main} thrown in /in/Hcag9 on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28: Notice: Undefined variable: ar in /in/Hcag9 on line 3 Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Passed variable is not an array or object, using empty array instead' in /in/Hcag9:3 Stack trace: #0 /in/Hcag9(3): ArrayObject->__construct(NULL) #1 {main} thrown in /in/Hcag9 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/Hcag9 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/Hcag9 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/Hcag9 on line 2
Process exited with code 255.