Fatal error: Uncaught ValueError: base_convert(): Argument #3 ($to_base) must be between 2 and 36 (inclusive) in /in/D0EtA:2
Stack trace:
#0 /in/D0EtA(2): base_convert('9999', 10, 62)
#1 {main}
thrown in /in/D0EtA on line 2
Process exited with code 255.