javascript html5移动端轻松实现文件上传

<div class="camera-area">
 <form enctype="multipart/form-data" method="post">
 <input type="file" name="fileToUpload" class="fileToUpload" accept="image/*" capture="camera"/>
 <div class="upload-progress"><span></span></div>
 </form>
 <div class="thumb"></div>
 </div>

(function($) {
 $.extend($.fn, {
 fileUpload: function(opts) {
 this.each(function() {
 var $self = $(this);
 var doms = {
 "fileToUpload": $self.find(".fileToUpload"),
 "thumb": $self.find(".thumb"),
 "progress": $self.find(".upload-progress")
 };
 var funs = {
 //选择文件，获取文件大小，也可以在这里获取文件格式，限制用户上传非要求格式的文件
 "fileSelected": function() {
 var files = (doms.fileToUpload)[0].files;
 var count = files.length;
 for (var index = 0; index < count; index++) {
 var file = files[index];
 var fileSize = 0;
 if (file.size > 1024 * 1024)
 fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';
 else
 fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';
 }
 funs.uploadFile();
 },
 //异步上传文件
 uploadFile: function() {
 var fd = new FormData();//创建表单数据对象
 var files = (doms.fileToUpload)[0].files;
 var count = files.length;
 for (var index = 0; index < count; index++) {
 var file = files[index];
 fd.append(opts.file, file);//将文件添加到表单数据中
 funs.previewImage(file);//上传前预览图片，也可以通过其他方法预览txt
 }
 var xhr = new XMLHttpRequest();
 xhr.upload.addEventListener("progress", funs.uploadProgress, false);//监听上传进度
 xhr.addEventListener("load", funs.uploadComplete, false);
 xhr.addEventListener("error", opts.uploadFailed, false);
 xhr.open("POST", opts.url);
 xhr.send(fd);
 },
 //文件预览
 previewImage: function(file) {
 var gallery = doms.thumb;
 var img = document.createElement("img");
 img.file = file;
 doms.thumb.html(img);
 // 使用FileReader方法显示图片内容
 var reader = new FileReader();
 reader.onload = (function(aImg) {
 return function(e) {
 aImg.src = e.target.result;
 };
 })(img);
 reader.readAsDataURL(file);
 },
 uploadProgress: function(evt) {
 if (evt.lengthComputable) {
 var percentComplete = Math.round(evt.loaded * 100 / evt.total);
 doms.progress.html(percentComplete.toString() + '%');
 }
 },
 "uploadComplete": function(evt) {
 alert(evt.target.responseText)
 }
 };
 doms.fileToUpload.on("change", function() {
 doms.progress.find("span").width("0");
 funs.fileSelected();
 });
 });
 }
 });
})(Zepto);

$(".camera-area").fileUpload({
 "url": "savetofile.php",
 "file": "myFile"
 });

<?php
if (isset($_FILES['myFile'])) {
 // Example:
 writeLog($_FILES);
 move_uploaded_file($_FILES['myFile']['tmp_name'], "uploads/" . $_FILES['myFile']['name']);
 echo 'successful';
}
function writeLog($log){
 if(is_array($log) || is_object($log)){
 $log = json_encode($log);
 }
 $log = $log."\r\n";

 file_put_contents('log.log', $log,FILE_APPEND);
}
?>