PHP-input上传图片(JS压缩->上传)后台掉扫二维码插件，扫描二维码获取二维码地址。直接进入二维码网址！

前端：

<style>
div.file{display:inline-block;width:400px;height:400px;line-height:200px;position:relative;overflow:hidden;color:red;font-size:100px;}
div.file input{position:absolute;width:500px;height:500px;left:50px;top:0px;zoom:1;filter:alpha(opacity=0);opacity:0;font-size:100px;}

button:last-chile{width:200px;height:200px;}
.btn{width:200px;height:200px;
font-size:80px;
}
</style>


<!--[if lte IE 7]><style>div.file{display:inline}</style><![endif]-->
<form id="imageForm" class="bs-docs-example form-horizontal" method="post" action="https://www.beefvip.com/index.php?route=account/my/erweima"  enctype="multipart/form-data">  
<div class="file">扫一扫<input  type="file" capture="camera" accept="image/*" id="image" name="image"  multiple/></div>
<input type="hidden" name="base64img" id="base64img"/> 
</form>



<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
</script>
<script>

  $(function(){
    $("input[type=file]").on('change', function(){

      var filePath = $(this).val(),         //获取到input的value，里面是文件的路径
              fileFormat = filePath.substring(filePath.lastIndexOf(".")).toLowerCase(),
              fileObj = document.getElementById($(this).attr('id')).files[0]; //上传文件的对象,要这样写才行，用jquery写法获取不到对象

      var imgBase64str = '';      //存储图片的imgBase64
      // 检查是否是图片
      if( !fileFormat.match(/.png|.jpg|.jpeg/) ) {
        alert('上传错误,文件格式必须为：png/jpg/jpeg');
        return;
      }
      var that = this;
      // 调用函数，对图片进行压缩
      compress(fileObj,function(imgBase64){
        imgBase64str = imgBase64;//存储转换后的base64编码

        var reader  = new FileReader();
        
        file = that.files[0]
        reader.addEventListener("load", function () {
          
          $("#base64img").val(imgBase64str); 
          
          document.forms[0].submit();
        }, false);
        reader.readAsDataURL(file)
      });



    })
 
  })
  // 对图片进行压缩
  function compress(fileObj, callback){
    if ( typeof (FileReader) === 'undefined') {
      console.log("当前浏览器内核不支持base64图标压缩");
      //调用上传方式不压缩
      directTurnIntoBase64(fileObj,callback);
    } else {
      var reader = new FileReader();
      reader.onload = function (e) { //要先确保图片完整获取到，这是个异步事件


        var image = new Image();
        image.src=e.target.result;
        image.onload = function(){
          square = 0.2,   //定义画布的大小，也就是图片压缩之后的像素
                  canvas = document.createElement('canvas'), //创建canvas元素
                  context = canvas.getContext('2d'),
                  imageWidth = Math.round(square*image.width),    //压缩图片的大小
                  imageHeight = Math.round(square*image.height),
                  data = '';

          canvas.width = imageWidth;
          canvas.height = imageHeight;
          context.clearRect(0, 0, imageWidth, imageHeight);  //在给定矩形内清空一个矩形
          context.drawImage(this, 0, 0, imageWidth, imageHeight);
          var data = canvas.toDataURL('image/jpeg',0.6);
          //压缩完成执行回调

          callback(data);
        };
      };
      reader.readAsDataURL(fileObj);

    }
  }
  // 不对图片进行压缩，直接转成base64
  function directTurnIntoBase64(fileObj,callback){
    var r = new FileReader();
    // 转成base64
    r.onload = function(){
      //变成字符串
      imgBase64 = r.result;
      //console.log(imgBase64);
      callback(imgBase64);
    }
    r.readAsDataURL(fileObj);    //转成Base64格式
  }
</script>

php后台代码：

public function erweima(){
// https://www.beefvip.com/index.php?route=account/my/erweima
//https://paystation.top/api/index/editimg


$base64img=$_REQUEST['base64img'];
$infoz_info = $this->base64_image_content($base64img,"/www/wwwroot/www.beefvip.com/upload/saoyisao/");
//echo($infoz_info['filepath']);
$path=$infoz_info['filepath'];
list($kong,$www, $wwwroot, $beefvip, $upload, $saoyisao, $img) = explode("/", $path);
$p = $beefvip.'/'.$saoyisao.'/'.$img;


//存进数据库
$this->load->model('account/allzong');
$info= $this->model_account_allzong->saoyisao($p);
// var_dump($info);

include_once 'lib/QrReader.php';// 引入识别二维码插件

// 读取二维码的缩略图并识别，识别二维码
$qrcode = new \QrReader($path);
$text = $qrcode->text(); //返回识别后的文本
// $uuid = explode("q/", $text)[1]; // 截取最后的参数
// var_dump($qrcode);
// var_dump($text);
if($text){
//header( "Location: $text" );
echo $text;
}else{
echo '0';
}

}

/**
* [将Base64图片转换为本地图片并保存]
* @param $base64_image_content [要保存的Base64]
* @param $path [要保存的路径]
* @return bool|string
*/
public function base64_image_content($base64_image_content,$path){
//匹配出图片的格式
if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){
$type = $result[2];
//生成文件名
$file_name = mt_rand(1,10).".{$type}";
//路径和文件名拼接
$local_file_url = $path.$file_name;
if (file_put_contents($local_file_url, base64_decode(str_replace($result[1], '', $base64_image_content)))){
return array("filename"=>$file_name,"path"=>$path,"filepath"=>$local_file_url);
}else{
return false;
}
}else{
return false;
}
}

lib二维码插件包下载地址:

链接：https://pan.baidu.com/s/1LdnHySv9-kHMbKyXbEcFnA
提取码：th68