Fatal error: Uncaught Error: Value of type null is not callable in /in/haoNC:4
Stack trace:
#0 {main}
thrown in /in/haoNC on line 4
Process exited with code 255.
Fatal error: Uncaught Error: Function name must be a string in /in/haoNC:4
Stack trace:
#0 {main}
thrown in /in/haoNC on line 4
Process exited with code 255.