PHP大文件分块上传功能实例详解

发布:smiling　来源: PHP粉丝网　添加日期：2021-12-07 10:32:51　浏览: 评论：0　

本文实例讲述了PHP大文件分块上传功能，分享给大家供大家参考，具体如下：

前端代码

使用file.slice将文件进行分割，然后分别进行异步上传。

<!DOCTYPE html>

<html lang="zh-cn">

<head>

  <meta charset="utf-8">

  <meta http-equiv="X-UA-Compatible" content="IE=edge">

  <meta name="viewport" content="width=device-width, initial-scale=1">

  <title><%= title %></title>

  

  <link rel="stylesheet" href="http://zui.sexy/dist/css/zui.min.css" rel="external nofollow" >

</head>

<body>

  <div class="container" style="margin-top: 30px;">

    <form class="form-inline" method="post" enctype="multipart/form-data">

     <div class="form-group">

      <input type="file" id="fileBig" class="form-control">

     </div>

     <button type="submit" class="btn btn-primary">提交</button>

    </form>

  </div>

  

  <script src="http://zui.sexy/assets/jquery.js"></script>

  

  <script src="http://zui.sexy/dist/js/zui.min.js"></script>

  <script type="text/javascript">

    $('form').submit(function() {

      let file = $(":file")[0].files[0];

      let fileName = file.name;

      let fileSize = file.size;

      console.log('fileSize',fileSize);

      let blockSize = 0.9*1024*1024;

      let num = Math.ceil(fileSize/blockSize);

      let start = 0;

      let end = 0;

      for(let i=1;i<=num;i++){

        end = blockSize*i;

        if(end > fileSize){

          end = fileSize;

        }

        let block = file.slice(start,end);

        start = end;

        let fd = new FormData();

        fd.append('block',block);

        fd.append('name',fileName);

        fd.append('total',num);

        fd.append('index',i);

        $.ajax({

          url:"upload.php",

          type:"POST",

          data:fd,

          async:true,

          processData:false,

          contentType:false,

          success:(res)=>{

            console.log('res_'+i+":");

            console.log(res);

          }

        })

      }

      return false;

    });

  </script>

</body>

</html>

后端代码

在所有的文件上传成功之后，合并生成原来的大文件

<?php

$name = $_POST['name'];

$index = $_POST['index'];

$total = $_POST['total'];

echo "name:".$name.PHP_EOL;

echo "index:".$index.PHP_EOL;

echo "total:".$total.PHP_EOL;

move_uploaded_file($_FILES['block']['tmp_name'],'upload/'.$name."_".$index);

$list = scandir('upload');

$num = count($list)-2;

echo "cur_num:".$num.PHP_EOL;

if($num == $total){

  echo "upload done".PHP_EOL;

  echo $cmd = "cat upload/'{$name}_'* > upload/'{$name}'";

  shell_exec($cmd);

}