3v4l.org

run code in 300+ PHP versions simultaneously
<?php function x($n) { for($i = 1; $i <= $n; $i++) { if ($n % $i == 0 && $i != $n) { $factors[] = $i; echo "$i is a factor of $n." . PHP_EOL; } elseif ($i == $n) { echo "Removing $n from array.." . PHP_EOL; } } if ($n == array_sum($factors) / 2) { echo "It's perfect!" . PHP_EOL; } else { echo "It's not perfect!" . PHP_EOL; } } x(42); ?>
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 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
1 is a factor of 42. 2 is a factor of 42. 3 is a factor of 42. 6 is a factor of 42. 7 is a factor of 42. 14 is a factor of 42. 21 is a factor of 42. Removing 42 from array.. It's not perfect!
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 1 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 2 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 3 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 6 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 7 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 14 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 6 21 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 9 Removing 42 from array..PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hjVYk on line 16 It's not perfect!PHP_EOL

preferences:
274.3 ms | 404 KiB | 460 Q