Online PHP editor | refs for Si8TL

@ 2026-05-31T13:23:58Z

<?php
function isFactorial($n){
    $r = $n;
    foreach(range(1, $n) as $divider)
    {
        $r = $r / $divider;
    }
    if($r === 1) return true;
    return false;
}

echo isFactorial(10) . PHP_EOL;