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图形数字验证代码_PHP教程

时间:2021-07-01 10:21:17 帮助过:5人阅读

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)<1000);

?>



-------------------------------------------------------------------------------------------------------------

/*

* 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<50;$i++) //加入干扰象素

{

imagesetpixel($im, rand()%70 , rand()%30 , $gray);

}



ImagePNG($im);

ImageDestroy($im);

?>

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/314547.htmlTechArticle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(s...

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