Home >php教程 >php手册 >php生成酷炫的四个字符验证码,php生成酷炫验证码

php生成酷炫的四个字符验证码,php生成酷炫验证码

WBOY
WBOYOriginal
2016-06-13 08:41:171058browse

php生成酷炫的四个字符验证码,php生成酷炫验证码

本文实例为大家分享php生成验证码的实现代码,供大家参考,具体内容如下

<&#63;php
$im=imagecreate(200,100);//生成画布
imagecolorallocate($im,0,0,0);//背景色
$white=imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));//生成随机颜色
for($i=0;$i<9;$i++)
{
 imageline($im,rand(0,200),rand(0,100),rand(0,200),rand(0,100),$white);//生成干扰线条元素
}
for($i=0;$i<150;$i++)
{
 imagesetpixel($im,rand(0,200),rand(0,100),$white);//生成干扰点元素
}
for($i=0,$str='';$i<4;$i++)//通过循环获得四个字符
{
 switch(rand(1,3))
 {
  case'1':
  $ch=rand(0,9);
  break; 
  case'2':
  $ch=sprintf('%c',rand(97,122));
  break;
  case'3':
  $ch=sprintf('%c',rand(65,90));
  break;
 }
  $str.=$ch;

}
imagettftext($im,32,rand(0,15),55,70,$white,'c.ttc',$str);//在画布上输出字符串
header("Content-type:image/jpeg");
imagejpeg($im);
imagedestroy($im);
&#63;>

以上就是本文的全部内容,希望对大家学习PHP程序设计有所帮助。

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