BUG表现：

主机GD库启用，但是验证码显示为一红色叉，这是因为生成图片前缓冲区有数据导致，在生成图片前清理缓冲区数据即可正常

如果没有出现这个问题，则不需要下载此补丁(当然，安装此补丁也没有副作用的的!

^v^ )

把下面两个源码两个文件覆盖phpcms根目录下对应的文件即可

PHPCMS Team , Author :zhangxu@ku6.com

toimg.php源码:

require dirname(__FILE__).'/include/common.inc.php';

ob_clean();

if(isset($gd) && $gd==1

&& $auth)

{

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

$auth = phpcms_auth($auth, 'DECODE', $PHPCMS['authkey']);

$im = @imagecreate (strlen($auth)*9, 16) or die ("Cannot Initialize

new GD image stream");

$background_color = imagecolorallocate ($im, 255, 255, 255);// RGB

Background Color

$text_color = imagecolorallocate ($im, 0, 0, 0);// RGB Text

Color

imagestring ($im, 5, 0, 0,$auth, $text_color);

imagepng ($im);

imagedestroy ($im);

}

else

{

if(!$auth) exit;

if(function_exists("imagepng"))

{

$output='

src="'.PHPCMS_PATH.'toimg.php?gd=1&auth='.$auth.'"

align="absmiddle">';

}

else

{

$output = phpcms_auth($auth,

'DECODE', $PHPCMS['authkey']);;

}

echo "document.write('".$output."');";

}

?>

checkcode.php源码:

require dirname(__FILE__).'/include/common.inc.php';

//error_reporting(E_ALL);

$session = new phpcms_session();

$enablegd = 1;

$funcs =

array('imagecreatetruecolor','imagecolorallocate','imagefill','imagestring','imageline','imagerotate','imagedestroy','imagecolorallocatealpha','imageellipse','imagepng');

foreach($funcs as $func)

{

if(!function_exists($func))

{

$enablegd = 0;

break;

}

}

//echo $enablegd;

ob_clean();

if($enablegd)

{

//create captcha

$consts = 'bcdfghjkmnpqrstwxyz';

$vowels = 'aei23456789';

for ($x = 0; $x < 6; $x++)

{

$const[$x] = substr($consts,

mt_rand(0,strlen($consts)-1),1);

$vow[$x] = substr($vowels,

mt_rand(0,strlen($vowels)-1),1);

}

$radomstring = $const[0] . $vow[0] .$const[2] . $const[1] . $vow[1]

. $const[3] . $vow[3] . $const[4];

$_SESSION['checkcode'] = $string = substr($radomstring,0,4); //only

display 4 str

//set up image, the first number is the width and the second is the

height

$imageX = strlen($radomstring)*5.5; //the image width

$imageY =

20; //the image height

$im = imagecreatetruecolor($imageX,$imageY);

//var_dump($im);exit;

//creates two variables to store color

$background = imagecolorallocate($im, rand(180, 250), rand(180,

250), rand(180, 250));

$foregroundArr = array(imagecolorallocate($im, rand(0, 20), rand(0,

20), rand(0, 20)),

imagecolorallocate($im, rand(0, 20), rand(0, 10), rand(245,

255)),

imagecolorallocate($im, rand(245, 255), rand(0, 20), rand(0,

10)),

imagecolorallocate($im, rand(245, 255), rand(0, 20), rand(245,

255)));

$foreground2 = imagecolorallocatealpha($im, rand(20, 100), rand(20,

100), rand(20, 100),80);

$middleground = imagecolorallocate($im, rand(200, 160), rand(200,

160), rand(200, 160));

$middleground2 = imagecolorallocatealpha($im, rand(180, 140),

rand(180, 140), rand(180, 140),80);

//fill image with bgcolor

imagefill($im, 0, 0, imagecolorallocate($im, 250, 253, 254));

//writes string

imagestring($im, 5, 3, floor(rand(0,5))-1, $string[0],

$foregroundArr[rand(0,3)]);

imagestring($im, 5, 13, floor(rand(0,5))-1, $string[1],

$foregroundArr[rand(0,3)]);

imagestring($im, 5, 23, floor(rand(0,5))-1, $string[2],

$foregroundArr[rand(0,3)]);

imagestring($im, 5, 33, floor(rand(0,5))-1, $string[3],

$foregroundArr[rand(0,3)]);

for($i=0; $i

{

if(mt_rand(0,ord(substr($string,$i,1)))%2 == 0)

{

$string{$i}

= ' ';

}

}

imagestring($im, 2, 2, 0, $string, $foreground2);

//strikethrough

$border = imagecolorallocate($im, 133, 153, 193);

//imagefilledrectangle($aimg, 0, 0, $x_size - 1, $y_size - 1,

$back);

imagerectangle($im, 0, 0, $imageX - 1, $imageY - 1, $border);

$pointcol = imagecolorallocate($im, rand(0,255), rand(0,255),

rand(0,255));

for ($i=0;$i<20;$i++)

{

imagesetpixel($im,rand(2,$imageX-2),rand(2,$imageX-2),$pointcol);

}

//rotate

$middleground = imagecolorallocatealpha($im, rand(160, 200),

rand(160, 200), rand(160, 200), 80);

//random shapes

for ($x=0; $x<15;$x++)

{

if(mt_rand(0,$x)%2==0)

{

imageline($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0,

120), $middleground);

imageellipse($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0,

120), $middleground2);

}

else

{

imageline($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0,

120), $middleground2);

imageellipse($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0,

120), $middleground);

}

}

//output to browser

header("content-type:image/jpeg\r\n");

imagejpeg($im);

imagedestroy($im);

}

else

{

$files = glob(PHPCMS_ROOT.'/images/checkcode/*.jpg');

if(!is_array($files))

exit($LANG['please_check_dir_images_checkcode']);

$checkcodefile = $files[rand(0, count($files)-1)];

$_SESSION['checkcode'] = substr(basename($checkcodefile), 0,

4);

header("content-type:image/jpeg");

include $checkcodefile;

}

?>