图形数字验证代码code:
/*
* filename: authpage.php
*/
srand((double)microtime()*1000000);
//验证用户输入是否和验证码一致
if(isset($_post['authinput']))
{
if(strcmp($_post['authnum'],$_post['authinput'])==0)
echo 验证成功！;
else
echo 验证失败！;
}
//生成新的四位整数验证码
while(($authnum=rand()%10000)
?>
请输入验证码：
>
-------------------------------------------------------------------------------------------------------------
/*
* filename: authimg.php
*/
//生成验证码图片
header(content-type: image/png);
srand((double)microtime()*1000000);
$im = imagecreate(58,28);
$black = imagecolorallocate($im, 0,0,0);
$white = imagecolorallocate($im, 255,255,255);
$gray = imagecolorallocate($im, 200,200,200);
imagefill($im,68,30,$gray);
//将四位整数验证码绘入图片
imagestring($im, 5, 10, 8, $http_get_vars['authnum'], $white);
for($i=0;$i
{
imagesetpixel($im, rand()%70 , rand()%30 , $gray);
}
imagepng($im);
imagedestroy($im);
?>
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