iframe实现Ajax文件上传效果示例
doctype html>
<html>
<head>
<meta charset=utf-8>
<head>
<title>ajax 文件上传~~title>
head>
<script>
window.onload=function(){
var form=document.getElementsByTagName('form')[0];
form.onsubmit=function(){
var iframe=document.createElement('iframe');
iframe.src='do_upload.php';
var iframe_name="iframe"+Math.random();
iframe.name=iframe_name;
document.body.appendChild(iframe);
iframe.style.width='0px';
iframe.style.height='0px';
iframe.frameBorder='0';
form.target=iframe_name;
}
}
script>
<body>
<form enctype='multipart/form-data' method='post' action='do_upload.php'>
请选择文件:<input type='file' name='myFile'/><br/>
<input type='submit'/>
<div id='msg'>div>
form>
body>
html>
PHP部分
<?php $up_file=$_FILES['myFile']; if($up_file['error']===0){ if(!file_exists('./imgs')){ mkdir('./imgs'); } $save_name=rand().$up_file['name']; $bool=move_uploaded_file($up_file['tmp_name'],"./imgs/$save_name"); if($bool){ $msg='上传成功!'; }else{ $msg='上传失败!'; } } echo ""; ?>