PHP solution to the problem of the same name when uploading images or files in batches in TP3.2

The example in this article shares with you how to solve the problem of name conflict when uploading files or pictures in batches in TP3.2 for your reference. The specific content is as follows

1, html

<form action="{:U(&#39;Upload/index&#39;)}" enctype="multipart/form-data" method="post" >
  <p><input type="file" id="file3" name="ID[]" /></p>
  <p><input type="file" id="file4" name="ID[]" /></p>
  <input type="submit" value="上传" />
  <p><img id="img1" alt="" src="/Public/IMAGE/empty_thumb.gif" /></p>
 </form>

2, php

public function index(){
       if(!empty($_FILES)){
        $upload = new \Think\Upload();// 实例化上传类
        $upload->maxSize = 3145728;
        $upload->rootPath = './Uploads/';
        $upload->savePath = 'image/';
        //$upload->saveName = date('YmdHis').'-'.randomkeys(3);//msectime(),毫秒数13位
        $upload->saveName = 'msectime';   //自定义函数，采用13位毫秒和3位随机数
        $upload->exts   = array('jpg', 'gif', 'png', 'jpeg');
        $upload->autoSub = true;
        $upload->subName = array('date','Ymd');
        
        /* 判断$_FILES[$key]是否：一维数组，单张图片上传 -xzz0703 
         * 原理：html的input type = "file" name="IDcard"和name="IDcard[]"的区别：
         *    $_FILES前者到后台php是二维数组，后者是三维数组 
        */
        foreach($_FILES as $key=>$value){
          if(count($_FILES[$key]) == count($_FILES[$key],1)){
            $info = $upload->uploadOne($_FILES[$key]);
            if($info){
              echo json_encode(array('code'=>200,'id'=>$img_id,'name'=>$img_name));exit;
            }else{
              echo json_encode(array('code'=>0,'msg'=>$upload->getError()));exit;
            }
          }
        }
        if(count($_FILES)){
          $info = $upload->upload();//如果是二维数组，使用批量上传文件的方法
          if(!$info){
            $this->error($upload->getError());
            exit;
          }
          $img_url = '/Uploads/'.$info[0]['savepath'].$info[0]['savename'];
          $res = array('imgPath1'=>$img_url,code=>$img_url,'msg'=>$info);
          echo json_encode($res);
        }        
      }   
}

3. Core: Many friends are stuck on the saveName attribute when using the TP3.2 framework. The reason is that the upload server processing level takes millions of microseconds. soon.

Solution: saveName = 13 digits of milliseconds + 3 digits of random number, perfect solution, specific code:

//返回当前的毫秒时间戳和随机数合并的字符串
function msectime() {
  list($msec, $sec) = explode(' ', microtime());
  $msectime = (float)sprintf('%.0f', (floatval($msec) + floatval($sec)) * 1000).randomkeys(3);
  return $msectime;
}

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