Js+php实现异步拖拽上传文件

时间：2021-05-26

异步拖拽上传文件--小实例

upload.html

<!DOCTYPE html><!--To change this license header, choose License Headers in Project Properties.To change this template file, choose Tools | Templatesand open the template in the editor.--><html> <head> <title>TODO supply a title</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style> #box{ width:150px;height: 150px;border: 1px solid red; } </style> <script type="text/javascript" src="XMLhttpReuest.js"></script> <script> window.onload = function () { var box = document.getElementById('box'); box.ondragenter = function (e) { e.preventDefault(); } box.ondragover = function (e) { e.preventDefault(); } box.ondragleave = function (e) { e.preventDefault(); } box.ondrop = function (e) { e.preventDefault(); var file = e.dataTransfer.files[0]; var formData = new FormData(); formData.append('aa', file); var xml = ajaxFunction(); xml.open("post", './upload.php', true); xml.send(formData); xml.onreadystatechange = function () { if (xml.readyState == 4 && xml.status == 200) { var flag = xml.responseText; console.log(flag); if (flag == 1) {// box.innerHTML="上传成功"; alert('上传成功'); } } } } } </script> </head> <body> <div id="box"> 请拖入上传的文件 </div> </body></html>

upload.php

复制代码 代码如下:
<?php
header("Content-Type:text/html;charset=UTF-8");
if(is_uploaded_file($_FILES['aa']['tmp_name'])){
move_uploaded_file($_FILES['aa']['tmp_name'], "./".iconv("UTF-8", "GBK", $_FILES['aa']['name']));
echo '1';
}

XMLhttpReuest.js

function ajaxFunction() { var xmlHttp; try { // Firefox, Opera 8.0+, Safari xmlHttp=new XMLHttpRequest(); } catch (e) { // Internet Explorer try { xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { alert("您的浏览器不支持AJAX！"); return false; } } } return xmlHttp;}

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