3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach(array("Asia/Calcutta", "Asia/Rangoon") as $tz) {echo $tz,"=", (int)in_array($tz, timezone_identifiers_list()), "\n";}
Output for 5.6.28 - 5.6.40, 7.0.13 - 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
Asia/Calcutta=0 Asia/Rangoon=0
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.27, 7.0.0 - 7.0.12
Asia/Calcutta=0 Asia/Rangoon=1
preferences:
291.21 ms | 402 KiB | 376 Q