<?php
$now = new DateTime;
$next = new DateTime("last day of next week - 4 weekdays");
var_dump($now->format('d.m.Y'), $next->format('d.m.Y'), $next->diff($now)->format('%a'));
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (last day of next week - 4 weekdays) at position 9 (o): The timezone could not be found in the database' in /in/oFlFY:4
Stack trace:
#0 /in/oFlFY(4): DateTime->__construct('last day of nex...')
#1 {main}
thrown in /in/oFlFY on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/oFlFY on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/oFlFY on line 6
Process exited with code 255.