WB 2.08.x

require_once("../config.php");

if(extension_loaded('gd') AND function_exists('imageCreateFromJpeg') AND isset($_SESSION['captcha'])) {

	$image = imagecreate(120, 30);

	$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);

	$gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0);

	$darkgray = imagecolorallocate($image, 0x50, 0x50, 0x50);

	srand((double)microtime()*1000000);

	for($i = 0; $i < 30; $i++) {

		$x1 = rand(0,120);

		$y1 = rand(0,30);

		$x2 = rand(0,120);

		$y2 = rand(0,30);

		imageline($image, $x1, $y1, $x2, $y2 , $gray);  

	}

	for ($i = 0; $i < 5; $i++) {

		$fnt = rand(3,5);

		$x = $x + rand(12 , 20);

		$y = rand(7 , 12); 

		imagestring($image, $fnt, $x, $y, substr($_SESSION['captcha'], $i, 1), $darkgray); 

	}

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

	imagepng($image);

	imagedestroy($image);