3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (substr('Foo\\', -1) === '\\') { echo "Yes, really."; }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
Yes, really.
preferences:
40.42 ms | 406 KiB | 5 Q