3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $emptyGraves = $result = new DateTime(); echo "Before change:\n"; echo $emptyGraves->format('Y-m-d')."\n"; echo $result->format('Y-m-d')."\n"; // Notice that I just change $result $emptyGraves->modify('+3 days'); echo "\nAfter change:\n"; echo $emptyGraves->format('Y-m-d')."\n"; echo $result->format('Y-m-d')."\n";
based on 6GGvN
Output for 5.3.21 - 5.4.45, 5.6.28, 7.0.20 - 7.2.0
Before change: 2016-01-15 2016-01-15 After change: 2016-01-18 2016-01-18
Output for 7.0.6
Before change: 2016-05-21 2016-05-21 After change: 2016-05-24 2016-05-24
Output for 7.0.5
Before change: 2016-04-03 2016-04-03 After change: 2016-04-06 2016-04-06
Output for 7.0.4
Before change: 2016-03-10 2016-03-10 After change: 2016-03-13 2016-03-13
Output for 7.0.3
Before change: 2016-03-18 2016-03-18 After change: 2016-03-21 2016-03-21
Output for 7.0.2
Before change: 2016-03-23 2016-03-23 After change: 2016-03-26 2016-03-26
Output for 7.0.1
Before change: 2016-03-24 2016-03-24 After change: 2016-03-27 2016-03-27
Output for 7.0.0
Before change: 2016-03-27 2016-03-27 After change: 2016-03-30 2016-03-30
Output for 5.6.21
Before change: 2016-05-02 2016-05-02 After change: 2016-05-05 2016-05-05
Output for 5.6.20
Before change: 2016-04-10 2016-04-10 After change: 2016-04-13 2016-04-13
Output for 5.6.19
Before change: 2016-03-08 2016-03-08 After change: 2016-03-11 2016-03-11
Output for 5.6.18
Before change: 2016-03-15 2016-03-15 After change: 2016-03-18 2016-03-18
Output for 5.6.17
Before change: 2016-03-20 2016-03-20 After change: 2016-03-23 2016-03-23
Output for 5.6.16
Before change: 2016-03-28 2016-03-28 After change: 2016-03-31 2016-03-31
Output for 5.6.15
Before change: 2016-03-29 2016-03-29 After change: 2016-04-01 2016-04-01
Output for 5.6.14
Before change: 2016-04-14 2016-04-14 After change: 2016-04-17 2016-04-17
Output for 5.6.13
Before change: 2016-04-15 2016-04-15 After change: 2016-04-18 2016-04-18
Output for 5.6.12
Before change: 2016-04-20 2016-04-20 After change: 2016-04-23 2016-04-23
Output for 5.6.11
Before change: 2016-04-24 2016-04-24 After change: 2016-04-27 2016-04-27
Output for 5.6.10
Before change: 2016-04-25 2016-04-25 After change: 2016-04-28 2016-04-28
Output for 5.6.9
Before change: 2016-04-27 2016-04-27 After change: 2016-04-30 2016-04-30
Output for 5.6.8
Before change: 2016-04-30 2016-04-30 After change: 2016-05-03 2016-05-03
Output for 5.5.35
Before change: 2016-05-23 2016-05-23 After change: 2016-05-26 2016-05-26
Output for 5.5.34
Before change: 2016-04-11 2016-04-11 After change: 2016-04-14 2016-04-14
Output for 5.5.33
Before change: 2016-03-09 2016-03-09 After change: 2016-03-12 2016-03-12
Output for 5.5.32
Before change: 2016-03-17 2016-03-17 After change: 2016-03-20 2016-03-20
Output for 5.5.31
Before change: 2016-03-21 2016-03-21 After change: 2016-03-24 2016-03-24
Output for 5.5.30
Before change: 2016-04-01 2016-04-01 After change: 2016-04-04 2016-04-04
Output for 5.5.29
Before change: 2016-04-17 2016-04-17 After change: 2016-04-20 2016-04-20
Output for 5.5.28
Before change: 2016-04-21 2016-04-21 After change: 2016-04-24 2016-04-24
Output for 5.5.27
Before change: 2016-04-22 2016-04-22 After change: 2016-04-25 2016-04-25
Output for 5.5.26
Before change: 2016-04-26 2016-04-26 After change: 2016-04-29 2016-04-29
Output for 5.5.25
Before change: 2016-04-29 2016-04-29 After change: 2016-05-02 2016-05-02
Output for 5.5.24
Before change: 2016-05-24 2016-05-24 After change: 2016-05-27 2016-05-27