Warning: Undefined variable $parentClass in /in/AT04m on line 9
Fatal error: Uncaught TypeError: get_parent_class(): Argument #1 ($object_or_class) must be an object or a valid class name, null given in /in/AT04m:9
Stack trace:
#0 /in/AT04m(9): get_parent_class(NULL)
#1 {main}
thrown in /in/AT04m on line 9
Process exited with code 255.