我正在尝试使用 php 上传文件，并且正在从其他实际工作的实例中复制和重命名文件（上传图片）。但是由于某种原因，表单没有传递（POST）任何不是图像的文件：-/因此，在简历中，我得到了这个（Google）图像文件的“请求有效负载”：
------WebKitFormBoundaryrHOYostaC2KnUDlD
Content-Disposition: form-data; name="uploaded_file[]"; filename="image.jpg"
Content-Type: image/jpeg
------WebKitFormBoundaryrHOYostaC2KnUDlD--
但这对于 txt 或 pdf 文件：
------WebKitFormBoundaryc1RJOtSOpYKAZiBz--
这是表单和脚本（功能是避免用户单击“提交”，这些都很好用）：
echo '
<script language="JavaScript" type="text/javascript">
function HandleBrowseClick()
{
var fileinput = document.getElementById("uploaded_file");
fileinput.click();
}
function Handlechange()
{
var fileinput = document.getElementById("uploaded_file");
var textinput = document.getElementById("filename");
textinput.value = fileinput.value;
}
</script>';
echo '
<form enctype="multipart/form-data" target="_blank" name="send_file" id="send_file" method="post" action="file_upload.php">
<input type="file" class="hide button" id="uploaded_file" name="uploaded_file" onChange="Handlechange();"/>
<button type="submit" id="btn">Upload!</button>
</form>';
echo '
<div onclick="HandleBrowseClick();" id="fakeBrowse" >Load a file</div>
<input type="text" id="filename" size="50" readonly="true" />
';
所以，因为它没有传递任何东西，所以file_upload.php我得到了“ ERROR: Please browse for a file before clicking the upload button.”或“ Invalid argument supplied for foreach()”（如果我期望一个数组）错误。
我尝试使用application/x-www-form-urlencoded允许相同的结果。
现在对于那些如果没有问号就会生气的人：为什么该表格适用于图像但不适用于其他类型的文件？我哪里错了？
这是前几行file_upload.php（我认为没有必要，但你永远不知道）：
$target = "../files/temp/";
foreach ($_FILES["uploaded_file"]["error"] as $key => $error) {
if ($error != UPLOAD_ERR_OK) { echo "error"; die;}
$fileName = $target . $_FILES["uploaded_file"]["name"][$key]; // The file name
$fileTmpLoc = $_FILES["uploaded_file"]["tmp_name"][$key]; // File in the PHP tmp folder
$fileType = $_FILES["uploaded_file"]["type"][$key]; // The type of file it is
$fileSize = $_FILES["uploaded_file"]["size"][$key]; // File size in bytes
$fileErrorMsg = $_FILES["uploaded_file"]["error"][$key]; // 0 for false... and 1 for true last $key!!!
$fileName = preg_replace('#[^a-z.0-9]#i', '', $fileName); // filter the $filename
$fileName = strtolower($fileName);
$kaboom = explode(".", $fileName); // Split file name into an array using the dot
$fileExt = end($kaboom); // Now target the last array element to get the file extension
if (!$fileTmpLoc) { // if file not chosen
echo "ERROR: Please browse for a file before clicking the upload button.";
exit();
}
else if ($fileErrorMsg == 1) { // if file upload error key is equal to 1
echo "ERROR: An error occurred while processing the file. Try again.";
exit();
}
最后，还有一些js：
if (window.FormData) {
formdata = new FormData();
document.getElementById("btn").style.display = "none";
}
input.addEventListener("change", function (evt) {
document.getElementById("response").innerHTML = "Loading . . ."
var i = 0, len = this.files.length, img, reader, file;
for ( ; i < len; i++ ) {
file = this.files[i];
if (!!file.type.match(/image.*/)) {
if (formdata) {
formdata.append("uploaded_file[]", file);
}
}
}
if (formdata) {
$.ajax({
url: "file_upload.php",
type: "POST",
data: formdata,
processData: false,
contentType: false
}).done(function (res) {
document.getElementById("response").innerHTML = res;
if ( window.FileReader ) {
reader = new FileReader();
reader.onloadend = function (e) {
showUploadedItem(e.target.result, file.fileName);
};
reader.readAsDataURL(file);
}
});
}
}, false);
更改 contentType 没有任何区别谢谢！！！