function buildInfo(){
  $i = 0;
  foreach ($_FILES as $v){
    //判断是否是单文件
    if(is_string($v['name'])){
      $files[$i] = $v;
      $i++;
    }else{
      //多文件
      foreach ($v['name'] as $key => $value){
        $files[$i]['name'] = $value;
        $files[$i]['size'] = $v['size'][$key];
        $files[$i]['tmp_name'] = $v['tmp_name'][$key];
        $files[$i]['type'] = $v['type'][$key];
        $files[$i]['error'] = $v['error'][$key];
        $i++;
      }
    }
  }
  return $files;
}

if(!file_exists($path)){
    mkdir($path, 0777, true);
  }

$i = 0;
$files = buildInfo();

foreach ($files as $file){
    if($file['error'] == UPLOAD_ERR_OK){
}else{
    switch ($file['error']){
      case 1:
        $mes = "超过配置文件上传文件大小";
        break;
      case 2:
        $mes = "超过了表单设置";
        break;
      case 3:
        $mes = "文件部分被上传";
        break;
      case 4:
        $mes = "没有文件上传";
        break;
      case 6:
        $mes = "没找到临时目录";
        break;
      case 7:
        $mes = "文件不可写";
        break;
      case 8:
        $mes = "由于PHP的扩展程序中断了文件上传";
        break;
    }

if($file['error'] == UPLOAD_ERR_OK){
      $ext = getExt($file['name']);
      if(!in_array($ext, $allowExt)){
        exit("非法文件类型");
      }

if($imgFlag){
        if(!getimagesize($file['tmp_name'])){
          exit("不是真的图片类型");
        }
      }

if($file['size'] > $maxSize){
        exit("文件过大");
      }

if(!is_uploaded_file($file[‘tmp_name'])){ 
exit(“文件不是通过HTTP POST上传”); 
}

$filename = getUniName().".".$ext;
$destination = $path."/".$filename;
if(move_uploaded_file($file['tmp_name'], $destination)){
        $mes = "文件上传成功";
        $file['name'] = $filename;
        unset($file['error'], $file['tmp_name']);
        $uploadedFiles[$i] = $file;
        $i++;
      }