<?php
// Create two palette images
$palette1 = imagecreatetruecolor(200, 300);

$palette2 = imagecreatetruecolor(100, 100);

$green = imagecolorallocate($palette1, 0, 255, 0);

imageline($palette1, 20, 20, 40, 40, $green);
imageline($palette2, 10, 10, 20, 20, imagecolorallocate($palette2, 255, 0, 0));

imagepalettecopy($palette1, $palette2);
// Output image to the browser
header('Content-type: image/png');

imagepng($palette1);
imagedestroy($palette1);
imagedestroy($palette2);
?>