3v4l.org

run code in 300+ PHP versions simultaneously
<?php function x($n){ for($i=1;$i<$n;$i++){ if($n%$i==0){ $f[]=$i; echo"$i "; } } echo array_sum($f)==$n?"P\n":0; } for($b=1;$b<100;$b++){ x($b); }

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41.97 ms | 402 KiB | 5 Q