Question

How to square every digit of a number in PHP

Answer 1

function SquareDigits($number) {
    $result = 0;
    $mul = 1;
    
    while ($number > 0) {
        $digit = $number % 10;
        $result += $digit * $digit * $mul;
        $mul *= ($digit <= 3) ? 10 : 100;
        $number = (int)($number / 10);
    }
    
    return $result;
}

$num = 234;

$num = SquareDigits($num);

echo $num;




/*
run:
      
4916
      
*/

 

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