wazum

<?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);

NTICompass

<?php
/**
 * QR Code + Logo Generator
 *
 * http://labs.nticompassinc.com
 */
$data = isset($_GET['data']) ? $_GET['data'] : 'http://labs.nticompassinc.com';
$size = isset($_GET['size']) ? $_GET['size'] : '200x200';
$logo = isset($_GET['logo']) ? $_GET['logo'] : FALSE;