Hello world
Fatal error: Uncaught TypeError: Return value of foobar() must be an instance of void, none returned in /in/ajjGg:9
Stack trace:
#0 /in/ajjGg(11): foobar()
#1 {main}
thrown in /in/ajjGg on line 9
Process exited with code 255.
Warning: Unsupported declare 'strict_types' in /in/ajjGg on line 3
Parse error: syntax error, unexpected ':', expecting '{' in /in/ajjGg on line 5
Process exited with code 255.