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本篇章节讲解php实现的验证码文件类。分享给大家供大家参考。具体如下：
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();
?>
希望本文所述对大家的php程序设计有所帮助。 （编辑：李大同）
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