Dannato forum...

​
<?php
$size = 80;
$big = $size * 2;

$imgname = "https://chart.googleapis.com/chart?chs={$big}x{$big}&cht=qr&chl={$text}";
$original = imagecreatefrompng($imgname);
$image = imagecreatetruecolor($size, $size);
imagecopyresized($image, $original, 0, 0, 0, 0, $size, $size, $big, $big);

header('Content-Type: image/png');
imagepng($image);
imagedestroy($image);