3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ( $i = 9, $res = 0; $i; $i--) { echo ( $i & 1 ) . PHP_EOL; }
Output for 7.0.0 - 7.0.20, 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 - 8.2.19, 8.3.0 - 8.3.7
1 0 1 0 1 0 1 0 1
preferences:
292.23 ms | 404 KiB | 216 Q