PHP generates verification code and verification code verification complete example

WBOY
Release: 2016-07-25 08:46:24
Original
963 people have browsed it
  1. 无标题文档
  2. 验证码
  3. 看不清?换一个
复制代码

verifycode.php文件代码如下
  1. /*
  2. 图片验证码 Powered By KASON test http://www.hzhuti.com/nokia/c6/ */
  3. session_start();
  4. $num=4;//验证码个数
  5. $width=80;//验证码宽度
  6. $height=20;//验证码高度
  7. $code=' ';
  8. for($i=0;$i<$num;$i++)//生成验证码
  9. {
  10. switch(rand(0,2))
  11. {
  12. case 0:$code[$i]=chr(rand(48,57));break;//数字
  13. case 1:$code[$i]=chr(rand(65,90));break;//大写字母
  14. case 2:$code[$i]=chr(rand(97,122));break;//小写字母
  15. }
  16. }
  17. $_SESSION["VerifyCode"]=$code;
  18. $image=imagecreate($width,$height);
  19. imagecolorallocate($image,255,255,255);
  20. for($i=0;$i<80;$i++)//生成干扰像素
  21. {
  22. $dis_color=imagecolorallocate($image,rand(0,2555),rand(0,255),rand(0,255));
  23. imagesetpixel($image,rand(1,$width),rand(1,$height),$dis_color);
  24. }
  25. for($i=0;$i<$num;$i++)//打印字符到图像
  26. {
  27. $char_color=imagecolorallocate($image,rand(0,2555),rand(0,255),rand(0,255));
  28. imagechar($image,60,($width/$num)*$i,rand(0,5),$code[$i],$char_color);
  29. }
  30. header("Content-type:image/png");
  31. imagepng($image);//输出图像到浏览器
  32. imagedestroy($image);//释放资源
  33. ?>
复制代码

checkcode.php文件如下
  1. ini_set('display_errors','Off');
  2. session_start();
  3. if((strtoupper($_POST["code"])) ==strtoupper(($_SESSION["VerifyCode"]))){
  4. print("验证码正确,");
  5. }else{
  6. print("验证码错误,");
  7. }
  8. echo "提交的验证码:".strtoupper($_POST["code"]).",正确的验证码:".strtoupper($_SESSION["VerifyCode"]);
  9. ?>
复制代码

验证码, php
本主题由 小贝 于 2015-11-18 08:23 移动


source:php.cn
Statement of this Website
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
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!