问 题

function onSelectPhoto(files) {

file_obj = files[0];

if (use_general_upload) {

return;

}

var filesize = file_obj.size < 5120 || file_obj.size > 5242880;

var allow_type = '|.jpg|jpeg|.png|.gif|';

var ext_name = '|' + file_obj.name.toLowerCase().substr(file_obj.name.length - 4) + '|';

var filetype = (allow_type.indexOf(ext_name) == -1 && file_obj.name.indexOf(".") > 0);

var reader = new FileReader();

reader.onload = function (e) {

if (e.target.result.substr(0, 11) == 'data:base64') {

$("#preview_img").attr('src',

"data:application/octet-stream;"

+ e.target.result.substr(e.target.result.indexOf("base64,")));

} else {

$("#preview_img").attr('src', e.target.result);

}

}

if (filesize) {

file_obj = false;

showTextTime("您选择的文件大于5MB，请选择小于5MB的照片", 3000);

return false;

}

if (filetype) {

file_obj = false;

showTextTime("您选择的文件格式有误，应为JPG、PNG或GIF类型的文件", 3000);

return false;

}

file_name = file_obj.name;

reader.readAsDataURL(file_obj); //

// alert(reader);

}

图片上传处理代码

function upload_photo() {

if (file_obj == false) {

showTextTime("请先从手机中选取要上传的照片", 2000);

return false;

}

if (uploading) {

showTextTime("照片正在上传中，请稍候...", 2000);

return false;

}

uploading = true;

showLoading(loading_src, "照片上传中...", 0);

if (use_general_upload) {

document.forms[0].submit();

} else {

var ui = $("#upload_ifr");

var ui = ui[0];

ui.contentWindow.upload_photo();

}

return false;

}

function upload_photo() {

var xhr = new XMLHttpRequest();

if (xhr.upload) {

xhr.onreadystatechange = function(e) {

window.top.callbackHandler(e, xhr);

};

xhr.upload.οnprοgress=function(e){

if(e.lengthComputable){

var percent =(e.loaded / e.total *100|0)+"%";

}

}

var formData = new FormData();

formData.append('files', window.top.file_obj);

// alert(formData);

xhr.open("POST", 'upload_file.php', true);

xhr.send(formData);

}

}

这里我应该怎么在upload_file.php获取到传递过来的formData

解决方案

`

$smeta = $_POST['smeta'];

if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $smeta, $result)) {//base64上传

$data = base64_decode(str_replace($result[1], '', $smeta));

$dataname = './Uploads/' . uniqid() . '.' . $result[2];

if (file_put_contents($dataname, $data)) {

$this->ajaxoutput($dataname); //返回数据结构自行封装

}else{

$this->ajaxerror('上传出错');

}

}`

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