Why is the image green?

Question

PHP

$pic = imagecreatefromwebp('https://lh4.ggpht.com/XDX7NhI4PEE-4ygOxqZt6wy90kb9b6GY07Rg4-VnohpHzgRS8C8GdaLZAl_GfsyCkaA=h310-rw');
imagejpeg($pic, './example.jpg', 100);
imagedestroy($pic);