<?

$imagekod = '';

for ($i = 0; $i < 8; $i++) {

$imagekod .= chr(mt_rand(100,120));
$imagekod=strtoupper($imagekod);
}
// set up image
$height = 30;
$width = 100;
$im = ImageCreate($width, $height);
$white = ImageColorAllocate ($im, 255, 255, 255);
$black = ImageColorAllocate ($im, 128, 0, 0);

// draw on image
ImageFill($im, 0, 0, $black);
// ImageLine($im, 0, 0, $width, $height, $white);
ImageString($im, 300, 15, 10, $imagekod, $white);

// output image
Header ("Content-type: image/png");
ImagePng ($im);

// clean up
ImageDestroy($im);

?>