Example of verification code file class implemented by PHP, _PHP tutorial

An example of the verification code file class implemented by php,

The example in this article describes the verification code file class implemented by php. Share it with everyone for your reference. The details are as follows:

<&#63;php
/**
* @file
* @version 1.0
* @author  网海浪子
* @brief   验证码文件类
*
*/
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();
&#63;>

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