PHP Calculate aspect ratio from width and height

aspect_ratio.php

<?php

function getAspectRatio(int $width, int $height)
{
    // search for greatest common divisor
    $greatestCommonDivisor = static function($width, $height) use (&$greatestCommonDivisor) {
        return ($width % $height) ? $greatestCommonDivisor($height, $width % $height) : $height;
    };

    $divisor = $greatestCommonDivisor($width, $height);

    return $width / $divisor . ':' . $height / $divisor;
}

echo getAspectRatio(1280, 1024);
echo PHP_EOL;
echo getAspectRatio(1275, 715);

Output

5:4
255:143

This is a great solution. I was looking here but your answer was much better. I didn't want to post and take credit. Maybe you want to post an answer here?
https://stackoverflow.com/questions/36642512/get-image-aspect-ratio

Thanks for the solution 👍

useful just to add list($width, $height, $type, $attr) = getimagesize("path/to/your/image.jpg"); reference

@wazum Can I request to make another function which do reverse of the getAspectRatio like it will provide height and width from the getAspectRatio is there way to reverse this logic ?