HCF of two positive integers

<?php
class HCFCalculator {
    // Function to find the HCF of two numbers
    public function findHCF($num1, $num2) {
        $num1 = abs($num1); // Ensure positive values
        $num2 = abs($num2);

        while ($num2 != 0) {
            $temp = $num2;
            $num2 = $num1 % $num2;
            $num1 = $temp;
        }

        return $num1;
    }
}

// Usage
$hcfCalculator = new HCFCalculator();
$number1 = 48;
$number2 = 18;

$result = $hcfCalculator->findHCF($number1, $number2);

echo "HCF of $number1 and $number2 is: $result";
?>