Crop image in circle (php) - php

Question

The following code works on my laptop but doesn't work on remote server:
<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');
$filename = "../../content/".base64_decode($_GET["file"]);
$ext = pathinfo($filename, PATHINFO_EXTENSION);
if ($ext=="jpg" || $ext=="jpeg") {
$image_s = imagecreatefromjpeg($filename);
} else if ($ext=="png") {
$image_s = imagecreatefrompng($filename);
}
$width = imagesx($image_s);
$height = imagesy($image_s);
$newwidth = 285;
$newheight = 232;
$image = imagecreatetruecolor($newwidth, $newheight);
imagealphablending($image,true);
imagecopyresampled($image,$image_s,0,0,0,0,$newwidth,$newheight,$width,$height);
// create masking
$mask = imagecreatetruecolor($width, $height);
$mask = imagecreatetruecolor($newwidth, $newheight);
$transparent = imagecolorallocate($mask, 255, 0, 0);
imagecolortransparent($mask, $transparent);
imagefilledellipse($mask, $newwidth/2, $newheight/2, $newwidth, $newheight, $transparent);
$red = imagecolorallocate($mask, 0, 0, 0);
imagecopy($image, $mask, 0, 0, 0, 0, $newwidth, $newheight);
imagecolortransparent($image, $red);
imagefill($image,0,0, $red);
// output and free memory
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
imagedestroy($mask);
?>
It shows the following image on my laptop:
http://i.stack.imgur.com/Aai1r.png
And this is how it's shown on remote server:
http://i.stack.imgur.com/77fbV.png
What do you think? What's a problem?

Answer 1

Changed the line:
imagecopy($image, $mask, 0, 0, 0, 0, $newwidth, $newheight);
to:
imagecopymerge($image, $mask, 0, 0, 0, 0, $newwidth, $newheight,100);

Answer 2

I think a basic reading of how to debug http://blog.regehr.org/archives/199 would be useful to you, and help you to solve your problem

Answer 3

I think you might have problems with filepath. Check if pathinfo returns valid extension and add after $filename declaration something to check if it exists and is readable
if(!is_file($file) || !is_readable($file)){ die('Readable file not found');}