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run code in 150+ php & hhvm versions
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<?php function perfect($n) { if ($n < 1) { echo "Number has to be Positive."; return false; } for($i = 1; $i <= $n; $i++) { if ($n % $i == 0) { $factors[] = $i; echo "$i is a factor of $n." . PHP_EOL; } else { } } return ($n == array_sum($factors) / 2) ? true : false; } perfect(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. 42 is a factor of 42.
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/bhed2 on line 10 1 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 2 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 3 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 6 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 7 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 14 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 21 is a factor of 42.PHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/bhed2 on line 10 42 is a factor of 42.PHP_EOL