3v4l.org

run code in 300+ PHP versions simultaneously
<?php static $log = ""; $log .= sprintf("--%s--%s\n", "foo", date('Y-m-d H:i:s',time())); print $log; ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.23, 5.5.25 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
--foo--2014-09-29 20:13:30
Output for 5.5.24
--foo--2014-09-29 20:13:31
preferences:
214.66 ms | 401 KiB | 243 Q