3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach(['0', '3', 'abc', null, false]as$val) { echo $val??($val==='0')??''; }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.2.19, 8.3.0 - 8.3.7
03abc
Output for 5.6.0 - 5.6.25
Parse error: syntax error, unexpected '?' in /in/Km1Mq on line 5
Process exited with code 255.
preferences:
148.25 ms | 401 KiB | 203 Q