<?PHP
/**
* @file
* @version 1.0
* @author 网海浪子
* @date 2006-3-30
* @email sxf02615@163.com
* @brief 验证码文件类
*
*/
?>
<?PHP
class CCheckCodeFile
{
//验证码位数
private $mCheckCodeNum = 4;
//产生的验证码
private $mCheckCode = '';
//验证码的图片
private $mCheckImage = '';
//干扰像素
private $mdisturbColor = '';
//验证码的图片宽度
private $mCheckImageWidth = '80';
//验证码的图片宽度
private $mCheckImageHeight = '20';
/**
*
* @brief 输出头
*
*/
private function OutFileHeader()
{
header ("Content-type: image/png");
}
/**
*
* @brief 产生验证码
*
*/
private function CreateCheckCode()
{
$this->mCheckCode = strtoupper(substr(md5(rand()),$this->mCheckCodeNum));
return $this->mCheckCode;
}
/**
*
* @brief 产生验证码图片
*
*/
private function CreateImage()
{
$this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight);
imagecolorallocate ($this->mCheckImage,200,200);
return $this->mCheckImage;
}
/**
*
* @brief 设置图片的干扰像素
*
*/
private function SetdisturbColor()
{
for ($i=0;$i<=128;$i++)
{
$this->mdisturbColor = imagecolorallocate ($this->mCheckImage,rand(0,255),255));
imagesetpixel($this->mCheckImage,rand(2,128),38),$this->mdisturbColor);
}
}
/**
*
* @brief 设置验证码图片的大小
*
* @param $width 宽
*
* @param $height 高
*
*/
public function SetCheckImageWH($width,$height)
{
if($width==''||$height=='')return false;
$this->mCheckImageWidth = $width;
$this->mCheckImageHeight = $height;
return true;
}
/**
*
* @brief 在验证码图片上逐个画上验证码
*
*/
private function WriteCheckCodetoImage()
{
for ($i=0;$i<=$this->mCheckCodeNum;$i++)
{
$bg_color = imagecolorallocate ($this->mCheckImage,255));
$x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
$y = rand(0,$this->mCheckImageHeight-15);
imagechar ($this->mCheckImage,5,$x,$y,$this->mCheckCode[$i],$bg_color);
}
}
/**
*
* @brief 输出验证码图片
*
*/
public function OutCheckImage()
{
$this ->OutFileHeader();
$this ->CreateCheckCode();
$this ->CreateImage();
$this ->SetdisturbColor();
$this ->WriteCheckCodetoImage();
imagepng($this->mCheckImage);
imagedestroy($this->mCheckImage);
}
}
$c_check_code_image = new CCheckCodeFile();
//$c_check_code_image ->SetCheckImageWH(100,50);//设置显示验证码图片的尺寸
$c_check_code_image ->OutCheckImage();
?>
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。