// 获取文件夹中图片的数量和名称    public function show_tmp_file() {        $handler = opendir('./tmp/');//当前目录中的文件夹下的文件夹        $count = 0;        $filesize = 0;        $imgArr = [];        while( ($filename = readdir($handler)) !== false ) {            if($filename != "." && $filename != ".." && $filename != "qrcode.png"){                $imgArr[$count] = $filename;                $filesize += filesize('./tmp/'.$filename);                ++$count;            }        }        $outData['count'] = $count;        $outData['filesize'] = round($filesize / 1000 /1000,2) ."M";        $outData['data']  = $imgArr;        dump($outData);        closedir($handler);    }    // 清理无用的图片    public function clear_tmp_file() {        $handler = opendir('./tmp/');//当前目录中的文件夹下的文件夹        $count = 0;        $imgArr = [];        while( ($filename = readdir($handler)) !== false ) {            if($filename != "." && $filename != ".." && $filename != "qrcode.png"){                $imgArr[$count] = $filename;                ++$count;            }        }        // 获取所有已经分享的图片        $share_model = M('activity_img_share');        $result =   $share_model->field('imgurl')->select();        $n_r = [];        foreach ($result as $k => $v) {            $n_r[$k] = substr($v['imgurl'],5);        }        $count = 0;        foreach ($imgArr as $v) {            if (!in_array($v,$n_r)) {                // 删除                unlink('./tmp/'.$v);                $count ++ ;            }        }        dump("本次共清理了".$count."个临时图片");    }