图片验证码生成应用实例-php手册-php.cn

Home

php教程

php手册

图片验证码生成应用实例

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 13, 2016 am 10:03 AM

phpusegraphicspictureExampleapplicationgenerateofcodeprogramSimpleverify

一款简单的php生成图形验证码程序，实例告诉你了如何去使用这段验证程序，有需要的可以参考一下。

代码如下	复制代码
session_start();//开启session if(isset($_POST['check'])) { if($_POST['check']) { if($_POST['check']==$_SESSION['check_pic']) { echo " 验证码正确".$_SESSION['check_pic']; } else { echo " 验证码错误".$_SESSION['check_pic']; } } } ?>

index.php验证码生成程序

代码如下

复制代码

session_start();

for($i=0;$i {@$rand.=dechex(rand(1,15));//先生成随机数，再将十进制转十六进制，注意"."
}
$_SESSION['check_pic']=$rand;
$im=imagecreatetruecolor(100,30);//创建图片
$bg=imagecolorallocate($im,0,0,0);//设置颜色
$wh=imagecolorallocate($im,255,255,255);

imagestring($im,5,15,8,$rand,$wh);//字体，1-6

header("Content-type: image/jpeg");//输出图片
imagejpeg($im);
?>

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn