<?php
declare(strict_types=1);

$image = imagecreatetruecolor(2, 2);
$white = imagecolorallocate($image, 255, 255, 255);
imagefill($image, 0, 0, $white);
imagelayereffect($image, IMG_EFFECT_MULTIPLY);
$red = imagecolorallocate($image, 255, 0, 0);
imagesetpixel($image, 0, 0, $red);
$pixel = imagecolorsforindex($image, imagecolorat($image, 0, 0));
echo $pixel["red"], ",", $pixel["green"], ",", $pixel["blue"], "\n";
