3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($a=1; $a <= 3; $a++){ for($b=1; $b <= 3; $b++){ echo $a . "-" . $b . PHP_EOL; } }
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3
preferences:
118.43 ms | 1479 KiB | 4 Q