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<?php $s = new \DateTime('2016-03-01', new \DateTimeZone('Europe/Warsaw')); $e = new \DateTime('2016-03-31', new \DateTimeZone('Europe/Warsaw')); $d = $s->diff($e); var_dump($d); $s = new \DateTime('2016-05-01', new \DateTimeZone('Europe/Warsaw')); $e = new \DateTime('2016-05-31', new \DateTimeZone('Europe/Warsaw')); $d = $s->diff($e); var_dump($d); $s = new \DateTime('2016-04-01', new \DateTimeZone('Europe/Warsaw')); $e = new \DateTime('2016-04-30', new \DateTimeZone('Europe/Warsaw')); $d = $s->diff($e); var_dump($d);
based on 0olJZ
Output for 7.1.0 - 7.3.0beta1
object(DateInterval)#3 (16) { ["y"]=> int(0) ["m"]=> int(1) ["d"]=> int(1) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["f"]=> float(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(30) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) } object(DateInterval)#2 (16) { ["y"]=> int(0) ["m"]=> int(1) ["d"]=> int(0) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["f"]=> float(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(30) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) } object(DateInterval)#1 (16) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(29) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["f"]=> float(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(29) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }
Output for 5.5.0 - 5.6.30, 7.0.0 - 7.0.20
object(DateInterval)#3 (15) { ["y"]=> int(0) ["m"]=> int(1) ["d"]=> int(1) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(30) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) } object(DateInterval)#2 (15) { ["y"]=> int(0) ["m"]=> int(1) ["d"]=> int(0) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(30) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) } object(DateInterval)#1 (15) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(29) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(29) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }
Output for hhvm-3.11.1 - 3.17.3
object(DateInterval)#3 (0) { } object(DateInterval)#6 (0) { } object(DateInterval)#9 (0) { }