<?php
declare(strict_types=1);

$scale = imageaffinematrixget(IMG_AFFINE_SCALE, ["x" => 2.0, "y" => 2.0]);
$move = imageaffinematrixget(IMG_AFFINE_TRANSLATE, ["x" => 5.0, "y" => 3.0]);
$first = imageaffinematrixconcat($scale, $move);
$second = imageaffinematrixconcat($move, $scale);
$x = 4;
$y = 2;
echo $first[0] * $x + $first[2] * $y + $first[4], ",", $first[1] * $x + $first[3] * $y + $first[5], "\n";
echo $second[0] * $x + $second[2] * $y + $second[4], ",", $second[1] * $x + $second[3] * $y + $second[5], "\n";