如何使用ajax上传文件

问题描述：

我试图将单个文件发送到服务器，而不必更改网页.我决定使用此插件: http://cmlenz.github.com/jquery-iframe-transport / 我对如何继续上传而不更改网页感到非常困惑... uploadimg.php返回:

I was trying to send a single file to the server without having to change the webpage. I decided to use this plugin: http://cmlenz.github.com/jquery-iframe-transport/ I am very confused on how to proceed for an upload without changing the webpage... the uploadimg.php returns:

<br />
<b>Notice</b>:  Undefined index: photo in <b>C:\website\uploadimg.php</b> on line <b>2</b><br />
<br />
<b>Notice</b>:  Undefined index: photo in <b>C:\website\uploadimg.php</b> on line <b>3</b><br />
<img src="userimg/" />

我的文件:

postAd.php

<html>
<head>
<script src="jquery.js"></script>
<script src="jquery-iframe-transport.js"></script>
<script>
$(document).ready(function(){
    $('#photo1').on('change', function(){
        $.ajax({
            url: "uploadimg.php",
            files: $("#photo1:file"),
            iframe: true,
            processData: false
        }).done(function(data){
            console.log(data);
        });
    });
});
</script>
</head>
<body>
<input type='file' name='photo' id='photo1' /></br>
</body>
</html>

uploadimg.php

<?php 
$file_tmp = $_FILES['photo']['tmp_name'][0];
$file = $_FILES['photo']['name'][0];
move_uploaded_file($file_tmp, "userimg/$file");
echo '<img src="userimg/' .$file .'" />';
?>

答

您没有提交表单，因此不会通过AJAX调用发送照片"字段.如果有可用的调试器，请检查$ _FILES数组以查看已填充的内容.从此看来，您可能是寻找用户文件"索引，但我不确定.

You are not submitting a form, so the 'photo' field is not going to be sent with the AJAX call. If you have a debugger available, check the $_FILES array to see what got populated. From this, it appears that you might be looking for a 'userfile' index, but I'm not sure.

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