1
我正在构建一个多文件上传表单，用户可以使用它来上传图片而不用重定向到另一个页面。用ajax，php和jquery上传多个文件
The pseudo code as follow:
1. prompt user to create new album and redirect them to the addphoto.php page.
2. at the addphoto.php page user can pick their pictures to upload without going further to other pages by using iframe.
2.1. When user put their pictures into the file input, it will be automatically uploaded by using `onchange()` (call $('input[type=file]').change() in jquery)
2.2. First, php code will check the uploaded file for validation (type, max size,..)
2.2. Then, it will add the image to the sql database and return the ID of the picture added.
2.3. Rename the image according to the userid, albumid, photoid and time uploaded.
2.4. Move the picture to photo folder, resize to get the thumbnail and move the thumbnail to the thumb folder
2.5. Update new name in sql database.
3. After calling $('input[type=file]').change() to submit the file, I proceed to get the picure information in sql database by using ajax and then append to the current page.
的问题是因为我调用$之后得到的图片信息（）变化（form.submit（）），所以有时它返回旧名称的图片不改名后一个。 （即使我使用睡眠（）函数在PHP延迟，它在某种程度上仍然发生
这里是JjQuery代码：
$(document).ready
(
function()
{
$("input[type=file]").change
(
function($e)
{
$("form").submit();
$(this).val("");
var user = $('#userID').val();
var albumid = $('#albumid').val();
$.get
(
"ajaxhandle.php",
{ref: "getlastedimg", uid: user, aid: albumid},
function ($xml)
{
$xml = $($xml);
if ($xml.find("success").text() == 1)
{
var imgid = $xml.find("imgid").text();
var imgpath = "photos/album/" + $xml.find("imgname").text();
var user = $xml.find("user").text();
var album = $xml.find("album").text();
var html = "<div class='photoReview'><div class='photoReviewCaption'><table><tr><td>Caption</td><td><textarea style='width:200px; height:50px' class='imgCaption'></textarea></td><tr><td>In this photo</td><td>No one<br/>Click on the picture to tag peopel</td></tr></table></div>";
html += "<div class='photoReviewImg'><img src='" + imgpath +"' /><div><input type='radio' name='albumcover' /><label for='albumcover'>This is the album cover</label><br /><a href=''>Remove this picture</a></div></div></div><div style='clear:both; margin-bottom:15px'></div>";
$("#photoReview").prepend(html);
}
else
{
alert($xml);
}
},
'xml'
);
}
);
没有什么错上传图片PHP代码，它运行平稳： ajaxhand.php代码如下：
if ($_GET["ref"] == "getlastedimg")
{
sleep(2);
$user = $_GET["uid"];
$album = $_GET["aid"];
$img = Image::getLastedImage($user, $album);
if ($img)
{
header("Content-Type: application/xml charset=ISO-8859-1");
echo "<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>";
echo "<image>";
echo "<success>1</success>";
echo "<imgid>" . $img["photoid"] . "</imgid>";
echo "<imgname>" . $img["photoname"] . "</imgname>";
echo "<user>" . $img["userid"] . "</user>";
echo "<album>" . $img["photoalbum"] . "</album>";
echo "<date>" . $img["timeupload"] . "</date>";
echo "</image>";
}
}