3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function x($n){for($i=1;$i<=$n;$i++){$n%$i==0&&$i!=$n?$f[]=$i&printf("$i "):0;}echo "$n " . array_sum($f) . " "; printf(array_sum($f)==$n?'P':'I');}x(28);
Output for 4.3.7 - 7.1.0
1 2 4 7 14 28 6 I
Output for 4.3.0 - 4.3.6
1 2 4 7 14 28 0 I