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| <?php
/**
* Class TnCode
* tncode 1.2 author:weiyingbin email:277612909@qq.com
* @ object webiste: http://www.39gs.com/archive/259.html
* @ https://github.com/binwind8/tncode
*/
namespace Common\Model;
class VerificationCodeModel extends \Think\Model
{
protected $autoCheckFields = false;
protected $tableName = "tw_job";
var $im = null;
var $im_fullbg = null;
var $im_bg = null;
var $im_slide = null;
var $bg_width = 240;
var $bg_height = 150;
var $mark_width = 50;
var $mark_height = 50;
var $bg_num = 6;
var $_x = 0;
var $_y = 0;
//容错象素 越大体验越好，越小破解难道越高
var $_fault = 3;
/**
* @var 验证码缓存键
*/
private $cacheCode = 'verify_code_key';
/**
* 错误次数
* @var int
*/
private $cacheCodeErr = 0;
function __construct(){
error_reporting(0);
}
public function make(){
$this->_init();
$this->_createSlide();
$this->_createBg();
$this->_merge();
$this->_imgout();
$this->_destroy();
}
public function verification($offset=''){
$right = $this->cacheInfo($this->cacheCode);
if(!$right || !$offset){
return false;
}
$ret = abs($right - $offset) <= $this->_fault;
if(!$ret){
//错误次数
$errorNum = $this->cacheInfo($this->cacheCodeErr);
$this->cacheInfo($this->cacheCodeErr, $errorNum + 1);
//错误10次必须刷新
if($errorNum > 9){
$this->cacheInfo($this->cacheCode, null);
}
return false;
}
return true;
}
private function cacheInfo($key, $val = null, $expire = 180){
//可以使用多种方式缓存，session，数据库，redis等
return D('Cache')->cache($key,$val,$expire);
}
private function _init(){
$bg = mt_rand(1,$this->bg_num);
$file_bg = './Public/images/verification/bg/'.$bg.'.png';
$this->im_fullbg = imagecreatefrompng($file_bg);
$this->im_bg = imagecreatetruecolor($this->bg_width, $this->bg_height);
imagecopy($this->im_bg,$this->im_fullbg,0,0,0,0,$this->bg_width, $this->bg_height);
$this->im_slide = imagecreatetruecolor($this->mark_width, $this->bg_height);
$value = $this->_x = mt_rand(50,$this->bg_width-$this->mark_width-1);
$this->_y = mt_rand(0,$this->bg_height-$this->mark_height-1);
$this->cacheInfo($this->cacheCode, $value);
$this->cacheInfo($this->cacheCodeErr, 0);
}
private function _imgout(){
if(function_exists('imagewebp')){//优先webp格式，超高压缩率
$type = 'webp';
$quality = 40;//图片质量 0-100
}else{
$type = 'png';
$quality = 7;//图片质量 0-9
}
header('Content-Type: image/'.$type);
$func = "image".$type;
$func($this->im,null,$quality);
}
private function _merge(){
$this->im = imagecreatetruecolor($this->bg_width, $this->bg_height*3);
imagecopy($this->im, $this->im_bg,0, 0 , 0, 0, $this->bg_width, $this->bg_height);
imagecopy($this->im, $this->im_slide,0, $this->bg_height , 0, 0, $this->mark_width, $this->bg_height);
imagecopy($this->im, $this->im_fullbg,0, $this->bg_height*2 , 0, 0, $this->bg_width, $this->bg_height);
imagecolortransparent($this->im,0);//16777215
}
private function _createBg(){
$file_mark = './Public/images/verification/img/mark.png';
$im = imagecreatefrompng($file_mark);
header('Content-Type: image/png');
//imagealphablending( $im, true);
imagecolortransparent($im,0);//16777215
//imagepng($im);exit;
imagecopy($this->im_bg, $im, $this->_x, $this->_y , 0 , 0 , $this->mark_width, $this->mark_height);
imagedestroy($im);
}
private function _createSlide(){
$file_mark = './Public/images/verification/img/mark2.png';
$img_mark = imagecreatefrompng($file_mark);
imagecopy($this->im_slide, $this->im_fullbg,0, $this->_y , $this->_x, $this->_y, $this->mark_width, $this->mark_height);
imagecopy($this->im_slide, $img_mark,0, $this->_y , 0, 0, $this->mark_width, $this->mark_height);
imagecolortransparent($this->im_slide,0);//16777215
//header('Content-Type: image/png');
//imagepng($this->im_slide);exit;
imagedestroy($img_mark);
}
private function _destroy(){
imagedestroy($this->im);
imagedestroy($this->im_fullbg);
imagedestroy($this->im_bg);
imagedestroy($this->im_slide);
}
}
|
