使用AJAX，PHP和jQuery上传多个图像
我有很多问题使用AJAX上传多个图像。 我写这个代码：
HTML
<form id="upload" method="post" enctype="multipart/form-data"> <div id="drop" class="drop-area"> <div class="drop-area-label"> Drop image here </div> <input type="file" name="file" id="file" multiple/> </div> <ul class="gallery-image-list" id="uploads"> <!-- The file uploads will be shown here --> </ul> </form> <div id="listTable"></div> jQuery的/ AJAX
$(document).on("change", "input[name^='file']", function(e){ e.preventDefault(); var This = this, display = $("#uploads"); // list all file data $.each(This.files, function(i, obj){ // for each image run script asynchronous (function(i) { // get data from input file var file = This.files[i], name = file.name, size = file.size, type = file.type, lastModified = file.lastModified, lastModifiedDate = file.lastModifiedDate, webkitRelativePath = file.webkitRelativePath, slice = file.slice, i = i; // DEBUG /* var acc = [] $.each(file, function(index, value) { acc.push(index + ": " + value); }); alert(JSON.stringify(acc)); */ $.ajax({ url:'/ajax/upload.php', contentType: "multipart/form-data", data:{ "image": { "name":name, "size":size, "type":type, "lastModified":lastModified, "lastModifiedDate":lastModifiedDate, "webkitRelativePath":webkitRelativePath, //"slice":slice, } }, type: "POST", // Custom XMLHttpRequest xhr: function() { var myXhr = $.ajaxSettings.xhr(); // Check if upload property exists if(myXhr.upload) { // For handling the progress of the upload myXhr.upload.addEventListener("progress",progressHandlingFunction, false); } return myXhr; }, cache: false, success : function(data){ // load ajax data $("#listTable").append(data); } }); // display progress function progressHandlingFunction(e){ if(e.lengthComputable){ var perc = Math.round((e.loaded / e.total)*100); perc = ( (perc >= 100) ? 100 : ( (perc <= 0) ? 0 : 0 ) ); $("#progress"+i+" > div") .attr({"aria-valuenow":perc}) .css("width", perc+"%"); } } // display list of files display.append('<li>'+name+'</li><div class="progress" id="progress'+i+'">' +'<div class="progress-bar" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" style="width: 0%;">' +'</div></div>'); })(i); }); });
我已经尝试了各种版本，我从来没有成功通过Ajax发送多个数据。 我已经用这种方式尝试了你上面看到的，现在我只能得到POST信息。 我明白为什么我得到POST，但我需要发送文件的信息，我不知道我错了。
我不是第一次和Ajax一起工作，经常在大多数项目中使用它，但我从来没有用过发送多个文件，现在困扰我。
谢谢！
尝试使用json上传，处理file对象
HTML
<div id="drop" class="drop-area ui-widget-header"> <div class="drop-area-label">Drop image here</div> </div> <br /> <form id="upload"> <input type="file" name="file" id="file" multiple="true" accepts="image/*" /> <ul class="gallery-image-list" id="uploads"> <!-- The file uploads will be shown here --> </ul> </form> <div id="listTable"></div>
CSS
#uploads { display:block; position:relative; } #uploads li { list-style:none; } #drop { width: 90%; height: 100px; padding: 0.5em; float: left; margin: 10px; border: 8px dotted grey; } #drop.hover { border: 8px dotted green; } #drop.err { border: 8px dotted orangered; }
JS
var display = $("#uploads"); // cache `#uploads`, `this` at `$.ajax()` var droppable = $("#drop")[0]; // cache `#drop` selector $.ajaxSetup({ context: display, contentType: "application/json", dataType: "json", beforeSend: function (jqxhr, settings) { // pre-process `file` var file = JSON.parse( decodeURIComponent(settings.data.split(/=/)[1]) ); // add `progress` element for each `file` var progress = $("<progress />", { "class": "file-" + (!!$("progress").length ? $("progress").length : "0"), "min": 0, "max": 0, "value": 0, "data-name": file.name }); this.append(progress, file.name + "<br />"); jqxhr.name = progress.attr("class"); } }); var processFiles = function processFiles(event) { event.preventDefault(); // process `input[type=file]`, `droppable` `file` var files = event.target.files || event.dataTransfer.files; var images = $.map(files, function (file, i) { var reader = new FileReader(); var dfd = new $.Deferred(); reader.onload = function (e) { dfd.resolveWith(file, [e.target.result]) }; reader.readAsDataURL(new Blob([file], { "type": file.type })); return dfd.then(function (data) { return $.ajax({ type: "POST", url: "/echo/json/", data: { "file": JSON.stringify({ "file": data, "name": this.name, "size": this.size, "type": this.type }) }, xhr: function () { // do `progress` event stuff var uploads = this.context; var progress = this.context.find("progress:last"); var xhrUpload = $.ajaxSettings.xhr(); if (xhrUpload.upload) { xhrUpload.upload.onprogress = function (evt) { progress.attr({ "max": evt.total, "value": evt.loaded }) }; xhrUpload.upload.onloadend = function (evt) { var progressData = progress.eq(-1); console.log(progressData.data("name") + " upload complete..."); var img = new Image; $(img).addClass(progressData.eq(-1) .attr("class")); img.onload = function () { if (this.complete) { console.log( progressData.data("name") + " preview loading..." ); }; }; uploads.append("<br /><li>", img, "</li><br />"); }; } return xhrUpload; } }) .then(function (data, textStatus, jqxhr) { console.log(data) this.find("img[class=" + jqxhr.name + "]") .attr("src", data.file) .before("<span>" + data.name + "</span><br />"); return data }, function (jqxhr, textStatus, errorThrown) { console.log(errorThrown); return errorThrown }); }) }); $.when.apply(display, images).then(function () { var result = $.makeArray(arguments); console.log(result.length, "uploads complete"); }, function err(jqxhr, textStatus, errorThrown) { console.log(jqxhr, textStatus, errorThrown) }) }; $(document) .on("change", "input[name^=file]", processFiles); // process `droppable` events droppable.ondragover = function () { $(this).addClass("hover"); return false; }; droppable.ondragend = function () { $(this).removeClass("hover") return false; }; droppable.ondrop = function (e) { $(this).removeClass("hover"); var image = Array.prototype.slice.call(e.dataTransfer.files) .every(function (img, i) { return /^image/.test(img.type) }); e.preventDefault(); // if `file`, file type `image` , process `file` if (!!e.dataTransfer.files.length && image) { $(this).find(".drop-area-label") .css("color", "blue") .html(function (i, html) { $(this).delay(3000, "msg").queue("msg", function () { $(this).css("color", "initial").html(html) }).dequeue("msg"); return "File dropped, processing file upload..."; }); processFiles(e); } else { // if dropped `file` _not_ `image` $(this) .removeClass("hover") .addClass("err") .find(".drop-area-label") .css("color", "darkred") .html(function (i, html) { $(this).delay(3000, "msg").queue("msg", function () { $(this).css("color", "initial").html(html) .parent("#drop").removeClass("err") }).dequeue("msg"); return "Please drop image file..."; }); }; };
PHP
<?php if (isset($_POST["file"])) { // do php stuff // call `json_encode` on `file` object $file = json_encode($_POST["file"]); // return `file` as `json` string echo $file; };
jsfiddle.net/guest271314/0hm09yqo/
我曾经使用这个插件： https ： //blueimp.github.io/jQuery-File-Upload/
这是完美的。
