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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 $n from array.."; } } var_dump($factors); $a = array_unique($factors); var_dump($a); echo "Removing duplicate factors."; return ($n == array_sum($a) / 2) ? true : false; } x(42); ?>
Output for git.master, git.master_jit, rfc.property-hooks
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..array(7) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(6) [4]=> int(7) [5]=> int(14) [6]=> int(21) } array(7) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(6) [4]=> int(7) [5]=> int(14) [6]=> int(21) } Removing duplicate factors.

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