H5图片压缩与上传

varfileInput = document.getElementById('fileInput');

  fileInput.onchange = function() {    varfile = fileInput.files[0];    // 创建一个压缩对象，该构造函数接收file或者blob。

    varmpImg = newMegaPixImage(file);

    // render方法的maxWith，maxHeight,以及quality都决定了压缩图片的质量

    varresImg = document.getElementById('resultImage');    mpImg.render(resImg, { maxWidth: 300, maxHeight: 300, quality: 0.5 }); 

  };

 fileSelected: function() {                    varfiles = $("#fileImage")[0].files;                    varcount = files.length;

                    console.log("共有"+ count + "个文件");                    for(vari = 0; i < count; i++) {varitem = files[i];

                        console.log("原图片大小", item.size);                        if(item.size > 1024 * 1024 * 2) {

                            console.log("图片大于2M，开始进行压缩...");

                            (function(img) {                                varmpImg = newMegaPixImage(img);                                varresImg = document.createElement("img");

                                resImg.file = img;

                                mpImg.render(resImg, { maxWidth: 500, maxHeight: 500, quality: 1 }, function() {

                                  //do some thing

                                });

                            })(item);

                        } 

                        core.previewImage(item);

                    }

                },

if(!empty($_POST['resultImage'])){

    if(preg_match('/^(data:\s*image\/(\w+);base64,)/', $_POST['resultImage'], $result)) {//正则获取图片格式

        $type= $result[2];

        $upload= newUploadFile();

        //设置权限

        @chmod(BASE_UPLOAD_PATH.DS.$this->default_dir,0755);//修改权限

        $path= BASE_UPLOAD_PATH.DS.'ipi_apply'.DS. $upload->getSysSetPath();//目录地址

        $new_file= md5(uniqid($this->member_info['member_id'])).".{$type}";//用微秒和会员id产生md5唯一字符串

        if(file_put_contents($path.$new_file, base64_decode(str_replace($result[1], '', $_POST['resultImage'])))) {

            $data['img_url'] = $new_file;

        }

    }

}