Counting counts by a rotary encoder

[LarryD]

@hamzahikram

  static unsigned long lastInterruptTime = 0;
  unsigned long interruptTime = millis();
  // If interrupts come faster than 5ms, assume it's a bounce and ignore
 if (interruptTime - lastInterruptTime > 5)

This will never evaluate.

How are things wired ?

Example:
https://www.electroschematics.com/wp-content/uploads/2015/06/rotary-encoder-arduino-wiring.png?resize=305%2C183

or (use 5v)