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PHP达成的封装验证码类详解

2019-09-25 09:25·巴黎人开户

 function __destruct(){
  imagedestroy($this->image);
 }
}

复制代码 代码如下:

应用如下:
测量试验,调用验证码类 code.php

新建yz.php验证码改变文书:

?>

<?php
/************************************************
//FILE:ImageCode
//DONE:生成动态验证码类
//DATE"2010-3-31
//Author:www.5dkx.com 5D欢腾博客
************************************************************************/
class ImageCode{
private $width; //验证码图片宽度
private $height; //验证码图片中度
private $codeNum; //验证码字符个数
private $checkCode; //验证码字符
private $image; //验证码画布
/************************************************************************
// Function:构造函数
// Done:成员属性初叶化
// Author:www.5dkx.com 5D开心博客
************************************************************************/
function __construct($width=60,$height=20,$codeNum=4)
{
$this->width = $width;
$this->height = $height;
$this->codeNum = $codeNum;
$this->checkCode = $this->createCheckCode();
}
function showImage()
{
$this->getcreateImage();
$this->outputText();
$this->setDisturbColor();
$this->outputImage();
}
function getCheckCode()
{
return $this->chekCode;
}
private function getCreateImage()
{
$this->image = imagecreatetruecolor($this->width,$this->height);
$back = imagecolorallocate($this->image,255,255,255);
$border = imagecolorallocate($this->image,255,255,255);
imagefilledrectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
//使用纯嫩黄填充矩形框,这里用的话后边搅扰码失效
/*假如想用困扰码的话使用上面包车型大巴*/
//imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$border);
}
private function createCheckCode()
{
for($i=0;$i<$this->codeNum;$i++)
{
$number = rand(0,2);
switch($number)
{
case 0: $rand_number = rand(48,57); break;//数字
case 1: $rand_number = rand(65,90);break;//大写字母
case 2: $rand_number = rand(97,122);break;//小写字母
}
$asc = sprintf("%c",$rand_number);
$asc_number = $asc_number.$asc;
}
return $asc_number;
}
private function setDisturbColor()//困扰吗设置
{
for($i=0;$i<=100;$i++)
{
//$color = imagecolorallocate($this->image,rand(0,255),rand(0,255),rand(0,255));
$color = imagecolorallocate($this->image,255,255,255);
imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color);
}
//$color = imagecolorallocate($this->image,0,0,0);
//imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color);
}
private function outputText()
{
//随机颜色、随机摆放、随机字符串向图像输出
for($i=0;$i<=$this->codeNum;$i++)
{
$bg_color = imagecolorallocate($this->image,rand(0,255),rand(0,128),rand(0,255));
$x = floor($this->width/$this->codeNum)*$i+3;
$y = rand(0,$this->height-15);
imagechar($this->image,5,$x,$y,$this->checkCode[$i],$bg_color);
}
}
private function outputImage()
{
if(imagetypes()&IMG_GIF)
{
header("Content_type:image/gif");
imagegif($this->image);
}
elseif(imagetypes()&IMG_JPG)
{
header("Content-type:image/jpeg");
imagejpeg($this->image,"",0.5);
}
elseif(imagetypes()&IMG_PNG)
{
header("Content-type:image/png");
imagejpeg($this->image);
}
elseif(imagetypes()&IMG_WBMP)
{
header("Content-type:image/vnd.wap.wbmp");
imagejpeg($this->image);
}
else
{
die("PHP不扶助图像创设");
}
}
function __destruct()
{
imagedestroy($this->image);
}
}
/*显示*/
/*******************************************************************
session_start();
$image = new ImageCode(60,20,4);
$image->showImage();
$_SESSION['ImageCode'] = $image->getCheckCode();
*******************************************************************/
?>

  }
  //通过访谈该措施向浏览器中输出图像
  function showImage($fontFace=""){
   //第一步:创设图像背景
   $this->createImage();
   //第二步:设置干扰因素
   $this->setDisturbColor();
   //第三步:向图像中随机画出文件
   $this->outputText($fontFace);
   //第四步:输出图像
   $this->outputImage();
  }

 代码如下

 private function setDisturbColor(){
  for($i=0;$i<=100;$i++){
   $color=imagecolorallocate($this->image,255,255,255);
   imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color);
  }
 }

上面是职能图,那个成效图是未有张开苦恼码的意义图
图片 1
上边是类代码

用PHP写贰个认证码类,并打开包装。
类名: validationcode.class.php 代码如下:

   private function createCheckCode(){
    $code="23456789abcdefghijkmnpqrstuvwrst";
    $str="";
    for($i=0;$i<$this->codeNum;$i++)
    {
     $char=$code{rand(0,strlen($code)-1)};
     $str.=$char;
    }
    return $str;
   }
   private function outputImage()
    {
    if(imagetypes()&IMG_GIF)
     {
       header("Content-Type:image/gif");
        imagepng($this->image);
     }else if(imagetypes()&IMG_JPG)
     {
        header("Content-Type:image/jpeg");
        imagepng($this->image);
     }else if(imagetypes()&IMG_PNG)
     {
        header("Content-Type:image/png");
      imagepng($this->image);
     }else if(imagetypes()&IMG_WBMP){
                 header("Content-Type:image/vnd.wap.wbmp");
     imagepng($this->image);
     }else
     {
      die("PHP不补助图片验证码");
     }
    }
        //通过该措施向浏览器输出图像
    function  showImage($fontFace="")
    {
     //成立图像背景
            $this->createImage();
     //设置干扰因素
           $this->setDisturbColor();
     //向图像中随机画出文件
     $this->outputText($fontFace);
     //输出图像
     $this->outputImage();
    }