Просмотр файла img.php

<?php
session_start();
$code=$_SESSION['code'];

$x = 40;
$y = 15;

$image = imagecreatetruecolor($x, $y);
$black = imagecolorallocate($image, 0, 0, 0);
$white = imagecolorallocate($image, 0, 50, 150);
imagefill($image, 0, 0, $black);
imageString($image, 5, 3, 2, $code, $white);
header("Content-type: ".image_type_to_mime_type(IMAGETYPE_GIF));
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-cache, must-relative");
imagegif($image);
imagedestroy($image);

?>