Fatal error: Uncaught Error: Call to undefined method DatePeriod::add() in /in/8K9Tm:10
Stack trace:
#0 {main}
thrown in /in/8K9Tm on line 10
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Fatal error: Call to undefined method DatePeriod::add() in /in/8K9Tm on line 10
Process exited with code 255.