php 图片滑动验证 貳

tp6方式：

注意：验证后销毁保存的图片（背景图和滑动图）

generator();
        //生成滑动图
        $huadong = $imageDragAuth->createDragbleImg();
        //生成背景图
        $beijing = $imageDragAuth->createBgImg();

        echo json_encode(array('status' => 0,'huadong' => '/'.$huadong,'biejing'=>'/'.$beijing,'y'=>$_SESSION['imageDragAuthY'].'px'));

    }


    /**
     * 滑动验证
     */
    public function valid(){
        require './../app/sdk/ImageDragAuth.php';

        $imageDragAuth = new \imageDragAuth(imagecreatefromjpeg('static/img/1.jpg'), imagecreatefrompng('static/img/3.png'), imagecreatefrompng('static/img/2.png'), 65280);
        $result = $imageDragAuth->validation($_GET['x'], $_GET['y']);


        echo json_encode(array('status' => $result,'msg' => $result ? '验证成功' : '验证失败','y' => $_SESSION['imageDragAuthY'].'px'));

    }
}

滑动图片验证类：

backgroundImgSrc = $backgroundImgSrc;
        $this->fillImgSrc = $fillImgSrc;
        $this->transparentImgSrc = $transparentImgSrc;
        $this->colorTransparentInt = $colorTransparentInt;
        
        $this->sessionXname = $sessionXname;
        $this->sessionYname = $sessionYname;
    }
    
    /**
    * 生成验证码，其实就是生成x坐标和y坐标，原理是一样的都存在服务器端的session里面
    * @param $stepSession 分步验证时候往session记录的session名
    * @return what return
    * @author Jobs Fan
    * @date: 下午3:25:20
    */
    public function generator($stepSession = 'setpSession')
    {
        $bgX = imagesx($this->backgroundImgSrc);
        $bgY = imagesy($this->backgroundImgSrc);
        $smX = imagesx($this->transparentImgSrc);
        $smY = imagesy($this->transparentImgSrc);
        
        $randX = rand(5,($bgX - $smX -5));
        $randY = rand(5,($bgY - $smY - 5));
        
        $_SESSION[$this->sessionXname] = $randX;
        $_SESSION[$this->sessionYname] = $randY;
        $_SESSION[$stepSession] = false;
    }
    
    /** 
    * 验证码验证
    * @param $x 用户通过ajax提交上来的x坐标值
    * @param $y 用户通过ajax提交上来的y坐标值
    * @param $threshold 容错阈值
    * @param $stepSession 分步验证时候往session记录的session名
    * @return boolean
    * @author Jobs Fan
    * @date: 下午3:39:37
    */
    public function validation($x,$y,$threshold=4,$stepSession = 'setpSession')
    {
        $x = (int) $x;
        $y = (int) $y;
        if (!$x || !$y || !isset($_SESSION[$this->sessionXname]) || !isset($_SESSION[$this->sessionYname]))
        {
            $this->generator();
            return false;
        }
        if ($x >= $_SESSION[$this->sessionXname] - $threshold && $x <= $_SESSION[$this->sessionXname] + $threshold && $y >= $_SESSION[$this->sessionYname] - $threshold && $y <= $_SESSION[$this->sessionYname] + $threshold)
        {
            $this->generator();
            $_SESSION[$stepSession] = true; //用户后面步骤的验证
            return true;
        }
        else 
        {
            $this->generator();
            return false;
        }
    }
    
    /**
    * 生成背景图
    * @param $x generator方法返回的x值
    * @param $y generator方法返回的y值
    * @return 直接输出图片
    * @author Jobs Fan
    * @date: 下午4:08:56
    */
    public function createBgImg()
    {
        header('Content-type: image/png');
        
        $bgX = imagesx($this->backgroundImgSrc);
        $bgY = imagesy($this->backgroundImgSrc);
        $smX = imagesx($this->fillImgSrc);
        $smY = imagesy($this->fillImgSrc);
        
        $background = imagecreatetruecolor($bgX,$bgY);
        imagecopy($background, $this->backgroundImgSrc, 0, 0, 0, 0, 868, 390);
        
        imagecopy($background, $this->fillImgSrc, (int)($_SESSION[$this->sessionXname]), (int)($_SESSION[$this->sessionYname]), 0, 0, $smX, $smY);
//        imagepng($background);
        // 把图片保存到本地
        $path = 'static/img/hua/'.date('YmdHis').rand(10000,99999).'.png';
        imagepng($background,$path);
        //销毁内存中的图片
        imagedestroy($background);

        $path = str_replace("\\", '/', $path);
        return $path;
    }
    
    /**
    * 生成前景图，也就是鼠标拖动的图
    * @param $x generator方法返回的x值
    * @param $y generator方法返回的y值
    * @return 直接输出图片
    * @author Jobs Fan
    * @date: 下午4:15:25
    */
    public function createDragbleImg()
    {
        header('Content-type: image/png');
      
        //imagesx — 取得图像宽度
      //imagesy — 取得图像高度
      //用法  int imagesy ( resource $image )
      
        $bgX = imagesx($this->backgroundImgSrc);   //868  
        $bgY = imagesy($this->backgroundImgSrc);   //390
        $smX = imagesx($this->transparentImgSrc);  //149
        $smY = imagesy($this->transparentImgSrc);  //149
      
        //imagecreatetruecolor — 新建一个真彩色图像
      //用法 resource imagecreatetruecolor ( int $width , int $height )
      
        $background = imagecreatetruecolor($bgX,$bgY);
        
      //
        imagecopy($background, $this->backgroundImgSrc, 0, 0, 0, 0, $bgX, $bgY);
        imagecopy($background, $this->transparentImgSrc, (int)($_SESSION[$this->sessionXname]), (int)($_SESSION[$this->sessionYname]), 0, 0, $smX, $smY);

        
      $imgCrop = imagecrop($background, array('x' => (int)($_SESSION[$this->sessionXname]),'y' => (int)($_SESSION[$this->sessionYname]), 'width' => $smX, 'height' => $smY));

        imagecolortransparent($imgCrop,65280);

        // 把图片保存到本地
        $path = 'static/img/hua/'.date('YmdHis').rand(10000,99999).'.png';
        imagepng($imgCrop,$path);
        //销毁
        imagedestroy($imgCrop);

        $path = str_replace("\\", '/', $path);
        return  $path;


    }

    /**
     * @name 删除 验证码图片
     */
    public function delete_img($path)
    {
        unlink($path);
    }
}