3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?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 $n from array.." . PHP_EOL; echo array_sum($factors) . " $n"; } } if ($n == array_sum($factors)) { echo "It's perfect!" . PHP_EOL; } else { echo "It's not perfect!" . PHP_EOL; } } x(28); ?>
Output for 4.3.10 - 4.4.9, 5.0.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1 is a factor of 28. 2 is a factor of 28. 4 is a factor of 28. 7 is a factor of 28. 14 is a factor of 28. Removing 28 from array.. 28 28It's perfect!
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
1 is a factor of 28.PHP_EOL2 is a factor of 28.PHP_EOL4 is a factor of 28.PHP_EOL7 is a factor of 28.PHP_EOL14 is a factor of 28.PHP_EOLRemoving 28 from array..PHP_EOL28 28It's perfect!PHP_EOL