PHP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()  {    $this->mCheckCode = strtoupper(substr(md5(rand()),0,$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, 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), rand(0,255), rand(0,255));     imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$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, 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   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();  ?>
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PHP验证码文件类
