PHP Aspect Ratio Utility

AspectRatioUtility.php

<?php

namespace App\Utility;

class AspectRatioUtility
{
    /**
     * Get the aspect ratio.
     *
     * @param int $width  The width.
     * @param int $height The height.
     *
     * @return string
     */
    public static function getAspectRatio(int $width, int $height): string
    {
        $gcd = self::getGreatestCommonDivisor($width, $height);

        return (string)($width / $gcd) . ':' . ($height / $gcd);
    }

    /**
     * Returns the greatest common divisor of two integers using the Euclidean algorithm.
     *
     * @param int $a
     * @param int $b
     *
     * @return int
     */
    public static function getGreatestCommonDivisor(int $a, int $b): int
    {
        return (int)($a % $b) ? self::getGreatestCommonDivisor($b, $a % $b) : $b;
    }
}