Fatal error: Uncaught TypeError: strtotime(): Argument #2 ($baseTimestamp) must be of type ?int, string given in /in/mB7W7:3
Stack trace:
#0 /in/mB7W7(3): strtotime('+6 months', '2014-07-01')
#1 {main}
thrown in /in/mB7W7 on line 3
Process exited with code 255.