Verification code file class

Verification code file class

/**
* @file
* @version 1.0
* @author Wanglangzi
* @date 2006-3-30
* @email [email]sxf02615@163.com[/email]
* @brief Verification code file class
 *
*/
?>
class CCheckCodeFile
{
//Verification code digits
private $mCheckCodeNum = 4;

//Generate Verification code
private $mCheckCode = '';

//Picture of verification code
private $mCheckImage = '';

//Interference pixel
private $mDisturbColor = '';

//Picture width of verification code
private $mCheckImageWidth = '80';

//Verification code image width
private $mCheckImageHeight = '20';

/**
*
* @brief output header
*
*/
private function OutFileHeader()
{
 header ("Content -type: image/png");
}

/**
*
* @brief generates verification code
*
*/
private function CreateCheckCode()
{
 $this->mCheckCode = strtoupper(substr(md5(rand()),0, $this->mCheckCodeNum));
 return $this->mCheckCode;
}

/**
*
* @brief generates verification code image
*
*/
private function CreateImage()
{
 $this->mCheckImage = @imagecreate ($ this->mCheckImageWidth,$this->mCheckImageHeight);
 imagecolorallocate ($this->mCheckImage, 200, 200, 200);
 return $this->mCheckImage;
}

/**
*
* @brief Set the interference pixels of the image
*
 */
private function SetDisturbColor()
{
 for ($i=0;$i<=128;$i++)
 {
 $this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255) , rand(0,255), rand(0,255));
 imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
 }
}

/* *
*
* @brief Set the size of the verification code image
*
* @param $width width
*
* @param $height height
*
*/
public function SetCheckImageWH($width,$height)
{
 if($width==''||$height=='')return false;
 $this->mCheckImageWidth = $width ;
 $this->mCheckImageHeight = $height;
 return true;
}

/**
*
* @brief Draw the verification codes one by one on the verification code picture
*
*/
private function WriteCheckCodeToImage()
{
 for ($i=0;$i<=$this ->mCheckCodeNum;$i++)
 {
 $bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
 $x = floor($this-> mCheckImageWidth/$this->mCheckCodeNum)*$i;
 $y = rand(0,$this->mCheckImageHeight-15);
 imagechar ($this->mCheckImage, 5, $x, $y, $ this->mCheckCode[$i], $bg_color);
 }
}

/**
*
* @brief Output verification code picture
*
*/
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);//Set the size of the verification code image
$c_check_code_image -> ;OutCheckImage();
?>