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<?php $start = new DateTime('2016-04-20 00:37:15'); $end = clone $start; $end = $end->modify('+7 days'); $diff = $end->diff($start); echo $diff->format('%d days') . PHP_EOL; var_dump($start, $end, $diff);
Output for 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
7 days object(DateTime)#1 (3) { ["date"]=> string(26) "2016-04-20 00:37:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#2 (3) { ["date"]=> string(26) "2016-04-27 00:37:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateInterval)#3 (10) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(7) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["f"]=> float(0) ["invert"]=> int(1) ["days"]=> int(7) ["from_string"]=> bool(false) }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
7 days object(DateTime)#1 (3) { ["date"]=> string(26) "2016-04-20 00:37:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#2 (3) { ["date"]=> string(26) "2016-04-27 00:37:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateInterval)#3 (16) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(7) ["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(1) ["days"]=> int(7) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }
Output for 5.5.14 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
7 days object(DateTime)#1 (3) { ["date"]=> string(26) "2016-04-20 00:37:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#2 (3) { ["date"]=> string(26) "2016-04-27 00:37:15.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateInterval)#3 (15) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(7) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(1) ["days"]=> int(7) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }
Output for 5.5.0 - 5.5.13
7 days object(DateTime)#1 (3) { ["date"]=> string(19) "2016-04-20 00:37:15" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#2 (3) { ["date"]=> string(19) "2016-04-27 00:37:15" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateInterval)#3 (15) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(7) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(1) ["days"]=> int(7) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }

preferences:
199.11 ms | 403 KiB | 341 Q