3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump((new \DateTime('Europe/Moscow'))->format(\DateTime::ISO8601));
Output for 5.4.33 - 5.4.45, 5.5.17 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.21, 7.0.23 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(24) "2015-10-18T11:34:13+0300"
Output for 7.0.22
string(24) "2015-10-18T11:34:14+0300"
Output for 5.4.0 - 5.4.32, 5.5.0 - 5.5.16
string(24) "2015-10-18T12:34:13+0400"

preferences:
259.47 ms | 402 KiB | 375 Q