# html：
```
<form class="layui-form layui-form-pane" action="" style="margin-top:20px;" enctype="multipart/form-data">
<center>
<div class="layui-upload-drag" id="uploadBanner">
<img class="layui-upload-img" id="upload-photo">
<i class="layui-icon" id="upload-icon"></i>
<p>点击上传，或将文件拖拽到此处</p>
<p>建议尺寸1920*512</p>
</div>
<input type="hidden" id="res" name="banner_photo" value="" lay-verify="required" />
<div class="layui-form-item" style="margin-top:10px;">
<button class="layui-btn" lay-submit="" lay-filter="sub">提交</button>
</div>
<div id="demoText"></div>
</center>
</form>
```
# JS：
```
layui.use('upload', function(){
var $ = layui.jquery
,upload = layui.upload;
//普通图片上传
var uploadInst = upload.render({
elem: '#uploadBanner'
,url: "{:U('Api/doUploadPic')}"
,before: function(obj){
//预读本地文件示例，不支持ie8
obj.preview(function(index, file, result){
$('#upload-photo').attr('src', result); //图片链接（base64）
$('#upload-photo').attr('style', 'height:10rem;');
$('#upload-icon').attr('style','display:none;');
});
}
,done: function(res, index, upload){
//如果上传失败
if(res.code > 0){
return layer.msg('上传失败');
}
//上传成功
console.log("成功啦！" + obj2string(res) + " " + index + " " + upload);
}
,error: function(){
//演示失败状态，并实现重传
var demoText = $('#demoText');
demoText.html('<span style="color: #FF5722;">上传失败</span> <a class="layui-btn layui-btn-xs demo-reload">重试</a>');
demoText.find('.demo-reload').on('click', function(){
uploadInst.upload();
});
}
});
});
```
# PHP接口：
```
public function doUploadPic()//上传模块
{
$upload = new \Think\Upload();
$upload->maxSize = 3145728;
$upload->exts = array('jpg', 'gif', 'png', 'jpeg');
$upload->rootPath = './Public/'; // 设置附件上传根目录
$upload->savePath = 'upload/'; // 设置附件上传子目录
$info = $upload->upload();
if(!$info){
$this->error($upload->getError());
}else{
foreach($info as $file){
$data = '/Public'.$file['savepath'] . $file['savename'];
$file_a=$data;
echo '{"code":0,"msg":"成功上传","data":{"src":"'.$file_a.'"}}';
}
}
}
```
# 图片就上传到/Public/upload文件夹下了：
不需要点击提交，Layui下图片自动上传，回传上传图片的地址，然后提交到数据库，也就是伪提交
---------------------
作者：mencre
来源：CSDN
原文：https://blog.csdn.net/qq_17497931/article/details/81290604
