<?php



session_start();



$_SESSION['code'] = mt_rand(1111, 9999);



$img = ImageCreate(42, 18);

$font = ImageColorALLocate($img, 255, 255, 255);

ImageFill($img, 0, 0, $font);



ImageString($img, 5, rand(2,3), rand(0,3), substr($_SESSION['code'], 0, 1), ImageColorALLocate($img, rand(0, 204), rand(0, 204), rand(0, 204)));

ImageString($img, 5, rand(11,12), rand(0,3), substr($_SESSION['code'], 1, 1), ImageColorALLocate($img, rand(0, 204), rand(0, 204), rand(0, 204)));

ImageString($img, 5, rand(20,21), rand(0,3), substr($_SESSION['code'], 2, 1), ImageColorALLocate($img, rand(0, 204), rand(0, 204), rand(0, 204)));

ImageString($img, 5, rand(29,30), rand(0,3), substr($_SESSION['code'], 3, 1), ImageColorALLocate($img, rand(0, 204), rand(0, 204), rand(0, 204)));



header('Content-type: image/gif');

ImageGIF($img);

ImageDestroy($img);

?>