Online PHP editor | output for 8OV4B

Output for 8.3.0 - 8.3.6: Fatal error: Uncaught Error: end(): Argument #1 ($array) could not be passed by reference in /in/8OV4B:2 Stack trace: #0 {main} thrown in /in/8OV4B on line 2
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18: Fatal error: Uncaught Error: end(): Argument #1 ($array) cannot be passed by reference in /in/8OV4B:2 Stack trace: #0 {main} thrown in /in/8OV4B on line 2
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33: Notice: Only variables should be passed by reference in /in/8OV4B on line 2 4
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.1, 7.3.32 - 7.3.33, 7.4.26: 4
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Strict Standards: Only variables should be passed by reference in /in/8OV4B on line 2 4