我正在尝试实现拖放图像上传。我在网上找到了一个相当简单的脚本并适应了我的使用。在我的本地安装中，文件上传非常好，但不是在服务器上。从我的调试尝试中，$_SERVER['HTTP_X_FILENAME'] 甚至没有被 php 设置。
我尝试了以下方法： - 确保上传文件夹设置为 755 - 更改 php 临时上传路径并增加允许的最大文件大小
不会发生任何类型的 php 或 js 错误。因为我有 die(print_r($_SERVER)); 在 php 中，我使用 chrome 检查器获得了 $_SERVER 转储，它不包含 HTTP_X_FILENAME 索引。
我的PHP是：
<?php
$fn = (isset($_SERVER['HTTP_X_FILENAME']) ? $_SERVER['HTTP_X_FILENAME'] : false);
if ($fn) {
// AJAX call
file_put_contents(
'../usr/photos/' . $fn,
file_get_contents('php://input')
);
echo "$fn uploaded";
exit();
}
else {
// form submit
if(!$_FILES['fileselect']) die(print_r($_SERVER));
else $files = $_FILES['fileselect'];
foreach ($files['error'] as $id => $err) {
if ($err == UPLOAD_ERR_OK) {
$fn = $files['name'][$id];
move_uploaded_file(
$files['tmp_name'][$id],
'../usr/photos/' . $fn
);
echo "<p>File $fn uploaded.</p>";
}
}
}
js如下：
//拖放照片上传(function() {
// getElementById
function $id(id) {
return document.getElementById(id);
}
// output information
function Output(msg) {
var m = $id("messages");
m.innerHTML = msg + m.innerHTML;
}
// file drag hover
function FileDragHover(e) {
e.stopPropagation();
e.preventDefault();
e.target.className = (e.type == "dragover" ? "hover" : "");
}
// file selection
function FileSelectHandler(e) {
// cancel event and hover styling
FileDragHover(e);
// fetch FileList object
var files = e.target.files || e.dataTransfer.files;
// process all File objects
for (var i = 0, f; f = files[i]; i++) {
ParseFile(f);
UploadFile(f);
}
}
// output file information
function ParseFile(file) {
/*Debug*/
Output(
"<p>File information: <strong>" + file.name +
"</strong> type: <strong>" + file.type +
"</strong> size: <strong>" + file.size +
"</strong> bytes</p>"
);
// display an image
if (file.type.indexOf("image") == 0) {
var reader = new FileReader();
reader.onload = function(e) {
Output(
"<p>" +
//"<strong>" + file.name + ":</strong><br />" +
'<img width="130" height="100" src="' + e.target.result + '" />' +
'<br />' +
'<input type="text" name="photo_name" value="'+ file.name +'" />' +
'<br />' +
'<input type="text" name="photo_caption" value="Caption" /></p>'
);
}
reader.readAsDataURL(file);
}
// display text
if (file.type.indexOf("text") == 0) {
var reader = new FileReader();
reader.onload = function(e) {
Output(
"<p><strong>" + file.name + ":</strong></p><pre>" +
e.target.result.replace(/</g, "<").replace(/>/g, ">") +
"</pre>"
);
}
reader.readAsText(file);
}
}
// upload JPEG files
function UploadFile(file) {
// following line is not necessary: prevents running on SitePoint servers
if (location.host.indexOf("sitepointstatic") >= 0) return
var xhr = new XMLHttpRequest();
if (xhr.upload && (file.type == "image/jpeg" || file.type == "image/png") && file.size <= $id("MAX_FILE_SIZE").value) {
// create progress bar
var o = $id("progress");
var progress = o.appendChild(document.createElement("p"));
progress.appendChild(document.createTextNode("upload " + file.name));
// progress bar
xhr.upload.addEventListener("progress", function(e) {
var pc = parseInt(100 - (e.loaded / e.total * 100));
progress.style.backgroundPosition = pc + "% 0";
}, false);
// file received/failed
xhr.onreadystatechange = function(e) {
if (xhr.readyState == 4) {
progress.className = (xhr.status == 200 ? "success" : "failure");
}
};
// start upload
xhr.open("POST", $id("upload").action, true);
xhr.setRequestHeader("X_FILENAME", file.name);
xhr.send(file);
}
}
// initialize
function Init() {
var fileselect = $id("fileselect"),
filedrag = $id("filedrag"),
submitbutton = $id("submitbutton");
// file select
fileselect.addEventListener("change", FileSelectHandler, false);
// is XHR2 available?
var xhr = new XMLHttpRequest();
if (xhr.upload) {
// file drop
filedrag.addEventListener("dragover", FileDragHover, false);
filedrag.addEventListener("dragleave", FileDragHover, false);
filedrag.addEventListener("drop", FileSelectHandler, false);
filedrag.style.display = "block";
// remove submit button
submitbutton.style.display = "none";
}
}
// call initialization file
if (window.File && window.FileList && window.FileReader) {
Init();
}
})();
先感谢您。