php实现的验证码文件类实例

本文实例讲述了PHP实现的验证码文件类。分享给大家供大家参考。具体如下：

rush:PHP;"> 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。