<?php
$fileName = ('https://alunos.b7web.com.br/media/courses/php.jpg');
list($width, $height) = getimagesize($fileName);
$newwidth = 400;
$newheight = 283;
$thumb = imagecreatetruecolor($newwidth, $newheight);
imagealphablending($thumb, false);
imagesavealpha($thumb, true);
$trans = imagecolorallocatealpha($thumb, 220, 220, 220, 127);
imagefill($thumb, 0, 0, $trans);
$source = imagecreatefrompng($fileName);
imagealphablending($source, true);
imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
header('Content-Type: image/png');
imagepng($thumb, 'test.png');
imagedestroy($thumb);
imagedestroy($source);
