$ch = curl_init("http://domain.com/dosya/xxx.zip");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
$output = curl_exec($ch);

$fh = fopen("xxx.zip", 'w');
fwrite($fh, $output);
fclose($fh);