Fatal error: Uncaught ArgumentCountError: Too few arguments to function onlyA(), 0 passed in /in/Z4Kpi on line 14 and exactly 1 expected in /in/Z4Kpi:4
Stack trace:
#0 /in/Z4Kpi(14): onlyA()
#1 {main}
thrown in /in/Z4Kpi on line 4
Process exited with code 255.
Warning: Missing argument 1 for onlyA(), called in /in/Z4Kpi on line 14 and defined in /in/Z4Kpi on line 4
Notice: Undefined variable: a in /in/Z4Kpi on line 5
bool(true)