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>
<!-- zui -->
<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>
<!-- zui javascript 依赖 jquery -->
<script src="http://zui.sexy/assets/jquery.js"></script>
<!-- zui 标准版压缩后的 javascript 文件 -->
<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);
}
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