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原生JS上传大文件显示进度条 php上传文件代码

2020-11-27 来源:意榕旅游网

JS原生上传大文件显示进度条,php上传文件,供大家参考,具体内容如下

在php.ini修改需要的大小:

upload_max_filesize = 8M   
post_max_size = 10M   
memory_limit = 20M 

<!DOCTYPE html>
<html>
<head>
 <title>原生JS大文件显示进度条</title>
 <meta charset="UTF-8">
 <style type="text/css">
 #parent{position: relative;width: 500px;height:20px;border:1px solid #ccc;display: none;border-radius:20px}
 #child{position: absolute;width:0%;height:20px;background: #5FB878;display: none;line-height: 20px;color: #ffffff;font-size: 12px;border-radius:20px}
 </style>
 <script type="text/javascript">
 function $(id){
 return document.getElementById(id);
 }
 </script>
</head>
<body>
 <form action="" method="post">
 <div id="parent">
 <div id="child"></div>
 </div>
 <p>上传文件:<input type="file" name="file"></p> 
 <p><input type="submit" value="提交" id="submit"></p>
 </form>
 <script type="text/javascript">
 var oForm = document.getElementsByTagName('form')[0];
 var oSubmit = $('submit');
 //如果多个人同时提交这个表单的时候,由于是异步的请求,互不影响
 oSubmit.onclick = function(){
 try{
 var xhr = new XMLHttpRequest();
 }catch(e){
 var xhr = new ActiveXObject("Msxml2.XMLHTTP");
 }
 xhr.upload.onprogress = function(e){
 var ev = e || window.event;
 var percent = Math.floor((ev.loaded / ev.total)*100); 
 // console.log(percent);
 //将百分比显示到进度条
 $('parent').style.display = 'block';
 $('child').style.display = 'block';
 //将上传进度的百分比显示到child里面
 $('child').style.width = percent+'%';
 $('child').style.textAlign = 'center';
 $('child').innerHTML = percent+'%';
 //判断如果百分比到达100%时候,隐藏掉
 if(percent==100){
 $('parent').style.display = 'none';
 $('child').style.display = 'none';
 }
 }
 xhr.open('post','progress.php',true);
 var form = new FormData(oForm);
 xhr.send(form);
 xhr.onreadystatechange = function(){
 if(xhr.readyState==4 && xhr.status==200){
 eval("var obj ="+xhr.responseText);
 if(obj.status){
 alert('上传成功');
 }else{
 alert('上传失败');
 }
 }
 }
 //阻止表单提交
 return false;
 }
 </script>
</body>
</html>
<?php
 //开始上传
 //注意:文件是windows系统的文件,采用的gbk编码,php文件使用的是utf-8编码
 //我们不能直接修改文件的编码,只能临时修改一下php的编码
 $dst_file = $_FILES['file']['name'];
 $dst_file = iconv('utf-8', 'gbk', $dst_file);
 if(move_uploaded_file($_FILES['file']['tmp_name'],$dst_file)){
 $data['status'] = 1;
 }else{
 $data['status'] = 0;
 }
 echo json_encode($data);
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