我正在尝试通过html表单将图像上传到我的服务器，而不刷新页面。我的问题是文件没有上传，我不知道为什么。
Javascript代码：
function uploadFiles(event) {
var fileSelect = document.getElementById('file');
var files = fileSelect.files;
var formData = new FormData();
for (var i = 0; i < files.length; i++) {
var file = files[i];
if (!file.type.match('image.*')) {
alert("File: " + file.name + " is not an image and will not be uploaded.");
continue;
}
formData.append('images[]', file, file.name);
}
var xhr = new XMLHttpRequest();
xhr.open('POST', '../htdocs/Php/upload_file.php', true);
xhr.onload = function () {
if (xhr.status === 200) {
// File(s) uploaded.
alert('files uploaded');
} else {
alert('An error occurred!');
}
};
xhr.send(formData);
}
HTML代码：
<form action="../htdocs/Php/upload_file.php" method="post" enctype="multipart/form-data">
<input type="file" name="images[]" id="file" onchange="uploadFiles()" multiple required />
</form>
PHP代码：
$numberOfFiles = count($_FILES['images']['name']);
for($id = 0; $id < $numberOfFiles; $id++)
{
if (!file_exists("../UploadedImages/" . $_FILES["images"]["name"][$id])) {
move_uploaded_file($_FILES["images"]["name"][$id], "../UploadedImages/" . $_FILES["images"]["name"][$id]);
}
}
看起来您的JavaScript是正确的，但您的PHP需要注意。我修改了你的php，以便它首先检查$_FILES是否通过。然后你有一些不正确的逻辑在你的！file_exists（）语句以及如何移动和检查文件名。
要检查文件是否存在，和要移动文件，需要使用$_FILES['images']['tmp_name']。"name"属性只是上传文件的名称，而不是上传到浏览器的物理文件。
要真正测试您的代码，请使用firebug并查看控制台。它应该返回一行，您可以展开并查看发布的内容和返回的内容。
下面是一个例子，我给你的以下代码返回如下：
C:'filepath'binaries'tmp'phpDB53.tmp Was Succesuflly uploaded
C:'filepath'binaries'tmp'phpDB54.tmp Was Succesuflly uploaded
C:'filepath'binaries'tmp'phpDB55.tmp Was Succesuflly uploaded
C:'filepath'binaries'tmp'phpDB56.tmp Was Succesuflly uploaded
注意：仔细检查文件路径是否绝对正确。当检查firebug控制台时，php文件也会返回文件错误，假设您在.上有php错误报告
//Check if files were passed through to your ajax page
if(isset($_FILES)) {
$numberOfFiles = count($_FILES['images']['name']);
for($id = 0; $id < $numberOfFiles; $id++)
{
if (file_exists($_FILES["images"]["tmp_name"][$id])) {
move_uploaded_file($_FILES["images"]["tmp_name"][$id], $_FILES["images"]["name"][$id]);
echo $_FILES["images"]["tmp_name"][$id] . " Was Succesuflly uploaded 'r'n ";
} else {
echo "file didnt exists " . $_FILES["images"]["tmp_name"][$id] . "'r'n ";
}
}
} else {
//No Files were passed through
echo "no files passed through";
}
exit();
希望这能回答你的问题。