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run code in 150+ php & hhvm versions
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<?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) / 2) { echo "It's perfect!" . PHP_EOL; } else { echo "It's not perfect!" . PHP_EOL; } } x(42); ?>
Output for 4.3.10 - 4.4.9, 5.0.2 - 7.1.0
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.. 54 42It'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/8NkL6 on line 6 1 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 6 2 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 6 3 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 6 6 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 6 7 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 6 14 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 6 21 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 9 Removing 42 from array..PHP_EOL54 42 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/8NkL6 on line 17 It's not perfect!PHP_EOL