Complete example of generating verification code and verification code in PHP_PHP tutorial

This article shares an example of a verification code that I use. From generating image verification codes to using verification code examples, students who need to learn can refer to this article.

hyml page

The code is as follows

Copy code

代码如下	复制代码
验证码：       看不清？换一个

Verification code:


Can’t see clearly? Change

代码如下

复制代码

/* 图片验证码 Powered By KASON */ session_start(); $num=4;//验证码个数 $width=80;//验证码宽度 $height=20;//验证码高度 $code=' '; for($i=0;$i<$num;$i++)//生成验证码 { switch(rand(0,2)) { case 0:$code[$i]=chr(rand(48,57));break;//数字 case 1:$code[$i]=chr(rand(65,90));break;//大写字母 case 2:$code[$i]=chr(rand(97,122));break;//小写字母 } } $_SESSION["VerifyCode"]=$code; $image=imagecreate($width,$height); imagecolorallocate($image,255,255,255); for($i=0;$i<80;$i++)//生成干扰像素 { $dis_color=imagecolorallocate($image,rand(0,2555),rand(0,255),rand(0,255)); imagesetpixel($image,rand(1,$width),rand(1,$height),$dis_color); } for($i=0;$i<$num;$i++)//打印字符到图像 { $char_color=imagecolorallocate($image,rand(0,2555),rand(0,255),rand(0,255)); imagechar($image,60,($width/$num)*$i,rand(0,5),$code[$i],$char_color); } header("Content-type:image/png"); imagepng($image);//输出图像到浏览器 imagedestroy($image);//释放资源 ?>

The verifycode.php file code is as follows

The checkcode.php file is as follows

The code is as follows

代码如下	复制代码
ini_set('display_errors', 'Off'); session_start(); if((strtoupper($_POST["code"])) == strtoupper(($_SESSION["VerifyCode"]))){ print("验证码正确,"); }else{ print("验证码错误,"); } echo "提交的验证码:".strtoupper($_POST["code"]).",正确的验证码：".strtoupper($_SESSION["VerifyCode"]); ?>

Copy code

ini_set('display_errors', 'Off');

session_start(); if((strtoupper($_POST["code"])) == strtoupper(($_SESSION["VerifyCode"]))){ print("Verification code is correct,"); }else{ Print("Verification code error,"); } echo "Submitted verification code:".strtoupper($_POST["code"]).", correct verification code: ".strtoupper($_SESSION["VerifyCode"]); ?>

http://www.bkjia.com/PHPjc/631291.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631291.htmlTechArticleThis article shares an example of a verification code that I use, from generating image verification codes to using verification codes. Students who need to learn can refer to this article. hyml page...

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