Капча не PHP

<?php

class antiscripting
{
var $width = 85; // image height
var $height = 40; // image width

var $transparent = 1; // transparency
var $interlace = false;

var $msg = 'NO BOTS!'; // text to display
var $font = 'times.ttf'; // full path to your font

var $size = 16; // font size
var $rotation = 10; // font rotation.

var $pad_x = 20; // padding x
var $pad_y = 35; // padding y

var $fg_r = 0; // text color RGB - red
var $fg_g = 0; // text color RGB - green
var $fg_b = 0; // text color RGB - blue


var $bg_r = 255; // background color RGB - red
var $bg_g = 255; // background color RGB - green
var $bg_b = 255; // background color RGB - blue

function drawImage()
{

$image = '';

$image = ImageCreate($this->width,$this->height);

// Allocate background color
$bg = ImageColorAllocate($image, $this->bg_r, $this->bg_g, $this->bg_b);

// Allocate text color
$fg = ImageColorAllocate($image, $this->fg_r, $this->fg_g, $this->fg_b);

if ($this->transparent)
ImageColorTransparent($image, $bg);

ImageInterlace($image, $this->interlace);

ImageTTFText($image, $this->size, $this->rotation, $this->pad_x, $this->pad_y, $fg, $this->font, $this->msg);

// Image distortion

// Alocate distortion color
$dc = ImageColorAllocate($image, rand(0,255), rand(0,255), rand(0,255));

// Draw eclipse
ImageArc($image, rand(0, $this->width ), rand(0, $this->height ), rand($this->width / 2, $this->width) ,rand($this->height / 2, $this->height), 0,360, $dc);

// Alocate distortion color
$dc = ImageColorAllocate($image, rand(0,255), rand(0,255), rand(0,255));

// Draw rectangle
ImageRectangle($image, rand(0, $this->width/2 ), rand(0, $this->height/2 ), rand($this->width / 2, $this->width) ,rand($this->height / 2, $this->height), $dc);

// Draw dots at random position
$dots = $this->width * $this->height / 10;
for($i=0;$i<$dots;$i++)
{
// Alocate dot color
$dc = ImageColorAllocate($image, rand(0,255), rand(0,255), rand(0,255));

// Draw dot
ImageSetPixel($image, rand(0,$this->width), rand(0,$this->height), $dc);
}

// Create image
ImagePNG($image);
}
}

$pic = new antiscripting;


$ttl = 30; // expires in 30 seconds
$now = mktime (date("H"),date("i"),date("s"),date("m"),date("d"),date("Y"));
$expires = mktime (date("H"),date("i"),date("s") + $ttl ,date("m"),date("d"),date("Y"));
$expires_gmt = gmdate('D, d M Y H:i:s', $expires).' GMT';
$last_modified_gmt = gmdate('D, d M Y H:i:s', $now).' GMT';

header('Content-type:image/png');
header('Expires: '.$expires_gmt);
header('last-modified: '.$last_modified_gmt);

session_start();
$string = $_SESSION['PROTECT'];
$pic->msg = $string;
$pic->drawImage();
?>