PHP和Ajax文件上传-无法通过$ _FILES获得tmp_name [英] PHP and Ajax file upload - Can't get the tmp_name with $_FILES
问题描述
我正在尝试使用Ajax上传文件，但是在处理文件时遇到了麻烦...为了进行测试，我构建了一个简单的代码，如下所示:
I'm trying to upload a file using Ajax, but I'm having troubles handling the file... For test purposes I've build a simple code that looks like this:
JS:
xmlhttp=new XMLHttpRequest();
xmlhttp.open("POST",document.getElementById('upload').action,true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
var cmdStr="q="+str;
xmlhttp.send(cmdStr);
document.getElementById("ResponseDiv").innerHTML=xmlhttp.responseText;
PHP:
$q=$_POST["q"];
echo $q;
它工作正常，并且 xmlhttp.responseText 打印 [目标文件] .
It works fine and xmlhttp.responseText prints [object File].
但是，我的问题是，我需要使用 $ _ FILES ["q"] ['tmp_name'] 获得临时文件名.为此，我将代码更改为以下内容:
My problem, however, is that I need to get the temporary file name with $_FILES["q"]['tmp_name']. To do so I have changed the code to the following:
JS:
xmlhttp=new XMLHttpRequest();
xmlhttp.open("POST",document.getElementById('upload').action,true);
xmlhttp.setRequestHeader("enctype","multipart/form-data");
var cmdStr="q="+str;
xmlhttp.send(cmdStr);
document.getElementById("ResponseDiv").innerHTML=xmlhttp.responseText;
PHP:
$q=$_FILES["q"]["tmp_name"];
echo $q;
问题是，现在使用 xmlhttp.responseText 我什么都没得到.有人知道我在做什么错吗?
Problem is that now with xmlhttp.responseText I don't get anything.
Anyone knows what I'm doing wrong?
推荐答案
查看此答案以使用AJAX上传文件.可能，但并非在所有浏览器中都兼容.
Check out this answer for making file uploads with AJAX. It is possible, but not compatible in all browsers.
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或者，如果您想即时上传，则可以使用一个很酷的库，名为"Uploadify".这是一个Flash/jquery(或现在的HTML5)装备，可让您即时上传文件.在Flash版本中，我上次使用它是...您可以添加回调函数，使其基本上可以执行您想要的任何事情.
Alternatively, if you want on the fly uploads, there is a cool library you can get called 'Uploadify'. It's a flash/jquery (or HTML5 now) rig that allows you to upload files on the fly. In the flash version, last time I used it... you can add in callback functions to make it do essentially anything you want.
一些聪明的javascript可以帮助您完成这项工作.
Some clever javascript could make this work for you.
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